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/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:43:46,280 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:43:46,282 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:43:46,294 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:43:46,294 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:43:46,295 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:43:46,296 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:43:46,298 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:43:46,300 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:43:46,300 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:43:46,301 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:43:46,332 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 [2018-09-30 23:43:46,350 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:43:46,350 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:43:46,351 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:43:46,351 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:43:46,352 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:43:46,352 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:43:46,352 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:43:46,353 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:43:46,353 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:43:46,353 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:43:46,353 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:43:46,353 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:43:46,353 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:43:46,354 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:43:46,354 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:43:46,354 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:43:46,354 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:43:46,354 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:43:46,355 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:43:46,355 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:43:46,355 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:43:46,355 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:43:46,355 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:43:46,356 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:43:46,356 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:43:46,356 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:43:46,356 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:43:46,356 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:43:46,357 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:43:46,357 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:43:46,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:43:46,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:43:46,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:43:46,426 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:43:46,427 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:43:46,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-09-30 23:43:46,428 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-09-30 23:43:46,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:43:46,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:43:46,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:43:46,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:43:46,489 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:43:46,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:43:46,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:43:46,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:43:46,530 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:43:46,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/1) ... [2018-09-30 23:43:46,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:43:46,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:43:46,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:43:46,556 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:43:46,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (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 [2018-09-30 23:43:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:43:46,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:43:46,814 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:43:46,814 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:43:46 BoogieIcfgContainer [2018-09-30 23:43:46,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:43:46,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:43:46,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:43:46,819 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:43:46,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:46" (1/2) ... [2018-09-30 23:43:46,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535c96d7 and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:43:46, skipping insertion in model container [2018-09-30 23:43:46,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:43:46" (2/2) ... [2018-09-30 23:43:46,823 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-09-30 23:43:46,833 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:43:46,842 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:43:46,893 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:43:46,893 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:43:46,894 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:43:46,894 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:43:46,894 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:43:46,894 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:43:46,894 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:43:46,895 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:43:46,895 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:43:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 23:43:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:43:46,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:46,931 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:43:46,933 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:46,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-09-30 23:43:46,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:46,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:46,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:46,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:46,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:47,203 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:43:47,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:43:47,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:43:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:43:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:43:47,234 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-30 23:43:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:47,381 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-30 23:43:47,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:43:47,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:43:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:47,393 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:43:47,393 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:43:47,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:43:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:43:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:43:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:43:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 23:43:47,432 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-30 23:43:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:47,433 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 23:43:47,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:43:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 23:43:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:43:47,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:47,434 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:43:47,434 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:47,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-09-30 23:43:47,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:47,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:47,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:47,543 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:43:47,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:43:47,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:43:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:43:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:43:47,547 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-30 23:43:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:47,662 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 23:43:47,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:43:47,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:43:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:47,664 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:43:47,664 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:43:47,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:43:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:43:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-30 23:43:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:43:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 23:43:47,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 23:43:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:47,670 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 23:43:47,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:43:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 23:43:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:43:47,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:47,671 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:43:47,672 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:47,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-09-30 23:43:47,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:47,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:47,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:47,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:47,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:47,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:47,862 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 [2018-09-30 23:43:47,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:47,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:48,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:48,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-30 23:43:48,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:43:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:43:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:43:48,245 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-09-30 23:43:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:48,479 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-30 23:43:48,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:43:48,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 23:43:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:48,484 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:43:48,484 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:43:48,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:43:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:43:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:43:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:43:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-30 23:43:48,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-30 23:43:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:48,491 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-30 23:43:48,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:43:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-30 23:43:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:43:48,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:48,492 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:43:48,493 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:48,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-09-30 23:43:48,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:48,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:48,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:48,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:48,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:48,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:48,644 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 [2018-09-30 23:43:48,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:48,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:48,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:48,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:48,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:48,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-30 23:43:48,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:43:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:43:48,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:43:48,733 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-30 23:43:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:48,898 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 23:43:48,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:43:48,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-30 23:43:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:48,901 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:43:48,901 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:43:48,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:43:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:43:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-30 23:43:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:43:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 23:43:48,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-30 23:43:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:48,908 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 23:43:48,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:43:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 23:43:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:43:48,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:48,909 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 23:43:48,909 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:48,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-09-30 23:43:48,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:48,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:48,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:48,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:48,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:49,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:49,317 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 [2018-09-30 23:43:49,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:49,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:43:49,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:49,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:49,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:49,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:43:49,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:43:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:43:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:43:49,577 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-09-30 23:43:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:49,794 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-30 23:43:49,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:43:49,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:43:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:49,796 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:43:49,796 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:43:49,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:43:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:43:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:43:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:43:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-30 23:43:49,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-30 23:43:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:49,802 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-30 23:43:49,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:43:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-30 23:43:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:43:49,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:49,803 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-30 23:43:49,803 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:49,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:49,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-09-30 23:43:49,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:49,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:49,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:49,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:49,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:49,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:49,954 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 [2018-09-30 23:43:49,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:49,981 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:49,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:49,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:50,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:50,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-30 23:43:50,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:43:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:43:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:43:50,039 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-30 23:43:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:50,215 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 23:43:50,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:43:50,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:43:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:50,217 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:43:50,217 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:43:50,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:43:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:43:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-30 23:43:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:43:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 23:43:50,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-30 23:43:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:50,223 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 23:43:50,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:43:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 23:43:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:43:50,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:50,224 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-30 23:43:50,224 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:50,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-09-30 23:43:50,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:50,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:50,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:50,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:50,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:50,514 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 [2018-09-30 23:43:50,529 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:50,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:43:50,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:50,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:50,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:50,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-30 23:43:50,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:43:50,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:43:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:43:50,772 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-09-30 23:43:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:50,935 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-30 23:43:50,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:43:50,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:43:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:50,936 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:43:50,936 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:43:50,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:43:50,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:43:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:43:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:43:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 23:43:50,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-30 23:43:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:50,942 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 23:43:50,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:43:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 23:43:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:43:50,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:50,943 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-30 23:43:50,943 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:50,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-09-30 23:43:50,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:50,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:50,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:50,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:51,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:43:51,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:43:51,110 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 23:43:51,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:51,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:51,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-30 23:43:51,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:43:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:43:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:43:51,172 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-30 23:43:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:51,295 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 23:43:51,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:43:51,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-30 23:43:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:51,296 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:43:51,297 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:43:51,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:43:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:43:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-30 23:43:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:43:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-30 23:43:51,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-30 23:43:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:51,303 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-30 23:43:51,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:43:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-30 23:43:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:43:51,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:51,304 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-30 23:43:51,304 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:51,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:51,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-09-30 23:43:51,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:51,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:51,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:51,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:51,484 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 [2018-09-30 23:43:51,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:51,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:51,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-30 23:43:51,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:43:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:43:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:43:51,790 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-09-30 23:43:52,159 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-30 23:43:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:52,162 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-30 23:43:52,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:43:52,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 23:43:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:52,164 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:43:52,164 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:43:52,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:43:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:43:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:43:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:43:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 23:43:52,174 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-30 23:43:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:52,174 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 23:43:52,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:43:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 23:43:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:43:52,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:52,180 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-30 23:43:52,180 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:52,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-09-30 23:43:52,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:52,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:52,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:52,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:52,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:43:52,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:52,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:52,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:52,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:52,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-30 23:43:52,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:43:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:43:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:43:52,474 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-30 23:43:52,802 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-09-30 23:43:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:52,889 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 23:43:52,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:43:52,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-30 23:43:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:52,891 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:43:52,891 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:43:52,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:43:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:43:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-30 23:43:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:43:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 23:43:52,898 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-30 23:43:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:52,898 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 23:43:52,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:43:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 23:43:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:43:52,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:52,899 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-30 23:43:52,899 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:52,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-09-30 23:43:52,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:52,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:52,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:52,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:53,338 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 [2018-09-30 23:43:53,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:53,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:43:53,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:53,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:53,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-30 23:43:53,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:43:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:43:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:43:53,741 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-09-30 23:43:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:54,174 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 23:43:54,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:43:54,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 23:43:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:54,174 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:43:54,175 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:43:54,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:43:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:43:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:43:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:43:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 23:43:54,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-30 23:43:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:54,181 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 23:43:54,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:43:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 23:43:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:43:54,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:54,182 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-30 23:43:54,182 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:54,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-09-30 23:43:54,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:54,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:54,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:54,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:54,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:43:54,387 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:54,413 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:54,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:54,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:54,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-30 23:43:54,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:43:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:43:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:43:54,461 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-30 23:43:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:54,716 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 23:43:54,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:43:54,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-30 23:43:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:54,719 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:43:54,719 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:43:54,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:43:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:43:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-30 23:43:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:43:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-30 23:43:54,726 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-30 23:43:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:54,726 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-30 23:43:54,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:43:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-30 23:43:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:43:54,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:54,728 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-30 23:43:54,728 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:54,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-09-30 23:43:54,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:54,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:54,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:54,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:54,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:43:54,917 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:54,959 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:43:54,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:54,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:55,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-30 23:43:55,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:43:55,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:43:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:43:55,410 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-09-30 23:43:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:55,695 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-30 23:43:55,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:43:55,695 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 23:43:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:55,696 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:43:55,696 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:43:55,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:43:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:43:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:43:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:43:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 23:43:55,703 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-30 23:43:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:55,703 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 23:43:55,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:43:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 23:43:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:43:55,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:55,704 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-30 23:43:55,704 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:55,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-09-30 23:43:55,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:55,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:55,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:55,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:55,993 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 [2018-09-30 23:43:56,002 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:43:56,033 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:43:56,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:56,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:56,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-30 23:43:56,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:43:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:43:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:43:56,086 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-30 23:43:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:56,388 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 23:43:56,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:43:56,389 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-30 23:43:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:56,391 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:43:56,392 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:43:56,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:43:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:43:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-30 23:43:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:43:56,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 23:43:56,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-30 23:43:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:56,399 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 23:43:56,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:43:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 23:43:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:43:56,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:56,400 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-30 23:43:56,400 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:56,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-09-30 23:43:56,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:56,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:56,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:56,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:56,630 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 [2018-09-30 23:43:56,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:56,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:57,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:57,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-30 23:43:57,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:43:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:43:57,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:43:57,012 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-09-30 23:43:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:57,326 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-30 23:43:57,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:43:57,326 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 23:43:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:57,327 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:43:57,327 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:43:57,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:43:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:43:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:43:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:43:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 23:43:57,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-30 23:43:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:57,336 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 23:43:57,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:43:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 23:43:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:43:57,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:57,337 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-30 23:43:57,337 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:57,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-09-30 23:43:57,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:57,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:57,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:57,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:57,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:57,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:57,544 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 [2018-09-30 23:43:57,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:57,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:57,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:57,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:57,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:57,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-30 23:43:57,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:43:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:43:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:43:57,646 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-30 23:43:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:58,200 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 23:43:58,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:43:58,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-30 23:43:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:58,203 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:43:58,203 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:43:58,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:43:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:43:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-30 23:43:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:43:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-30 23:43:58,212 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-30 23:43:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:58,212 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-30 23:43:58,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:43:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-30 23:43:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:43:58,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:58,213 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-30 23:43:58,214 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:58,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-09-30 23:43:58,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:58,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:58,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:58,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:58,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:58,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:58,523 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 [2018-09-30 23:43:58,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:58,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:43:58,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:58,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:58,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:58,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-30 23:43:58,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:43:58,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:43:58,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:43:58,996 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-09-30 23:43:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:59,654 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-30 23:43:59,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:43:59,654 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 23:43:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:59,655 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:43:59,655 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:43:59,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=1693, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:43:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:43:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:43:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:43:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 23:43:59,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-30 23:43:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:59,662 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 23:43:59,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:43:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 23:43:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:43:59,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:59,663 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-30 23:43:59,663 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:59,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-09-30 23:43:59,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:59,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:59,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:59,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:59,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:00,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:00,154 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 [2018-09-30 23:44:00,169 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:00,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:00,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:00,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:00,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:00,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-30 23:44:00,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:44:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:44:00,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:44:00,239 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-30 23:44:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:00,517 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 23:44:00,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:44:00,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-30 23:44:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:00,518 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:44:00,519 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:44:00,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:44:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:44:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-30 23:44:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:44:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 23:44:00,527 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-30 23:44:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:00,527 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 23:44:00,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:44:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 23:44:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:44:00,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:00,529 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-30 23:44:00,529 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:00,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-09-30 23:44:00,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:00,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:00,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:00,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:00,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:02,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:02,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:02,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:02,500 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:44:02,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:02,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:03,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:03,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-30 23:44:03,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:44:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:44:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:44:03,114 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-09-30 23:44:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:03,431 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 23:44:03,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:44:03,431 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 23:44:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:03,432 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:44:03,432 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:44:03,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:44:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:44:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:44:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:44:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 23:44:03,442 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-30 23:44:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:03,442 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 23:44:03,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:44:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 23:44:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:44:03,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:03,443 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-30 23:44:03,443 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:03,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-09-30 23:44:03,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:03,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:03,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:03,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:03,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:03,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:03,626 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 [2018-09-30 23:44:03,639 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:44:03,670 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-30 23:44:03,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:03,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:03,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:03,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-30 23:44:03,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:44:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:44:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:44:03,743 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-30 23:44:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:03,947 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 23:44:03,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:44:03,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 23:44:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:03,952 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:44:03,952 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:44:03,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:44:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:44:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-30 23:44:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:44:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-30 23:44:03,959 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-30 23:44:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:03,959 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-30 23:44:03,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:44:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-30 23:44:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:44:03,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:03,960 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-30 23:44:03,960 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:03,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-09-30 23:44:03,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:03,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:03,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:03,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:03,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:04,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:04,490 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 [2018-09-30 23:44:04,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:04,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:05,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:05,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-30 23:44:05,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:44:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:44:05,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:44:05,200 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-09-30 23:44:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:05,773 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-30 23:44:05,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:44:05,773 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 23:44:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:05,774 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:44:05,774 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:44:05,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=672, Invalid=2520, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:44:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:44:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:44:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:44:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 23:44:05,790 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-30 23:44:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:05,791 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 23:44:05,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:44:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 23:44:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:44:05,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:05,792 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-30 23:44:05,792 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:05,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:05,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-09-30 23:44:05,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:05,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:05,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:05,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:05,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:06,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:06,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:06,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:44:06,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:44:06,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:06,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:06,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:06,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-30 23:44:06,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:44:06,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:44:06,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:44:06,129 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-30 23:44:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:06,400 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 23:44:06,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:44:06,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-30 23:44:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:06,403 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:44:06,403 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:44:06,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:44:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:44:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-30 23:44:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:44:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 23:44:06,414 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-30 23:44:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:06,414 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 23:44:06,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:44:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 23:44:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:44:06,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:06,415 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-30 23:44:06,415 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:06,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:06,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-09-30 23:44:06,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:06,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:06,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:06,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:06,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:06,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:06,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:06,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:44:06,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:06,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:07,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:07,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-30 23:44:07,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:44:07,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:44:07,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1933, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:44:07,546 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-09-30 23:44:08,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:08,007 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-30 23:44:08,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:44:08,007 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 23:44:08,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:08,007 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:44:08,008 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:44:08,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=787, Invalid=2995, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:44:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:44:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:44:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:44:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 23:44:08,017 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-30 23:44:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:08,017 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 23:44:08,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:44:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 23:44:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:44:08,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:08,018 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-30 23:44:08,019 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:08,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-09-30 23:44:08,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:08,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:08,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:08,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:08,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:08,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:08,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:08,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:08,346 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:08,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:08,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:08,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:08,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-30 23:44:08,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:44:08,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:44:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:44:08,399 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-30 23:44:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:08,727 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 23:44:08,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:44:08,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-30 23:44:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:08,727 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:44:08,728 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:44:08,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:44:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:44:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-30 23:44:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:44:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-30 23:44:08,735 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-30 23:44:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:08,736 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-30 23:44:08,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:44:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-30 23:44:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:44:08,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:08,737 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-30 23:44:08,737 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:08,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-09-30 23:44:08,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:08,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:08,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:08,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:08,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:09,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:09,094 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 [2018-09-30 23:44:09,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:09,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:44:09,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:09,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:09,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:09,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-30 23:44:09,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:44:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:44:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:44:09,723 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-09-30 23:44:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:10,221 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-30 23:44:10,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:44:10,221 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 23:44:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:10,222 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:44:10,222 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:44:10,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:44:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:44:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:44:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:44:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 23:44:10,230 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-30 23:44:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:10,230 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 23:44:10,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:44:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 23:44:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:44:10,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:10,231 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-30 23:44:10,231 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:10,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-09-30 23:44:10,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:10,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:10,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:10,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:10,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:10,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:10,477 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 [2018-09-30 23:44:10,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:44:10,534 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 23:44:10,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:10,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:10,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:10,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-30 23:44:10,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:44:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:44:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:44:10,615 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-30 23:44:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:10,983 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 23:44:10,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:44:10,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-30 23:44:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:10,985 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:44:10,985 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:44:10,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:44:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:44:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-30 23:44:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:44:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 23:44:10,996 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-30 23:44:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:10,996 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 23:44:10,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:44:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 23:44:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:44:10,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:10,997 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-30 23:44:10,997 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:10,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:10,998 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-09-30 23:44:10,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:10,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:10,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:10,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:12,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:12,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:12,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:12,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:13,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:13,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-30 23:44:13,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:44:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:44:13,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=2619, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:44:13,367 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-09-30 23:44:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:14,116 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 23:44:14,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:44:14,116 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 23:44:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:14,117 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:44:14,117 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:44:14,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1044, Invalid=4068, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:44:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:44:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:44:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:44:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 23:44:14,126 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-30 23:44:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:14,126 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 23:44:14,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:44:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 23:44:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:44:14,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:14,127 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-30 23:44:14,128 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:14,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-09-30 23:44:14,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:14,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:14,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:14,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:14,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:14,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:14,341 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 [2018-09-30 23:44:14,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:44:14,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:44:14,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:14,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:14,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:14,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-30 23:44:14,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:44:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:44:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:44:14,447 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-30 23:44:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:14,729 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 23:44:14,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:44:14,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-30 23:44:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:14,730 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:44:14,730 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:44:14,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:44:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:44:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-30 23:44:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:44:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-30 23:44:14,739 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-30 23:44:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:14,740 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-30 23:44:14,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:44:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-30 23:44:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:44:14,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:14,740 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-30 23:44:14,741 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:14,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-09-30 23:44:14,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:14,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:14,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:15,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:15,128 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 [2018-09-30 23:44:15,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:15,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:44:15,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:15,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:16,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:16,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-30 23:44:16,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:44:16,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:44:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:44:16,808 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-09-30 23:44:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:17,928 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-30 23:44:17,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:44:17,928 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 23:44:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:17,929 INFO L225 Difference]: With dead ends: 98 [2018-09-30 23:44:17,929 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:44:17,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1186, Invalid=4666, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:44:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:44:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:44:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:44:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 23:44:17,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-30 23:44:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:17,940 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 23:44:17,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:44:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 23:44:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:44:17,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:17,941 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-30 23:44:17,942 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:17,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:17,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-09-30 23:44:17,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:17,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:17,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:17,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:17,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:18,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:18,243 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 [2018-09-30 23:44:18,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:18,296 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:18,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:18,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:18,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:18,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-30 23:44:18,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:44:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:44:18,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:44:18,436 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-30 23:44:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:18,735 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 23:44:18,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:44:18,736 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-30 23:44:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:18,737 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:44:18,737 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:44:18,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:44:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:44:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-30 23:44:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:44:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 23:44:18,748 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-30 23:44:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:18,748 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 23:44:18,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:44:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 23:44:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:44:18,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:18,749 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-30 23:44:18,749 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:18,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-09-30 23:44:18,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:18,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:18,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:18,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:18,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:19,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:19,360 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 [2018-09-30 23:44:19,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:19,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:44:19,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:19,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:20,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:20,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-30 23:44:20,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:44:20,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:44:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:44:20,234 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-09-30 23:44:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:21,332 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-30 23:44:21,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:44:21,332 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 23:44:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:21,333 INFO L225 Difference]: With dead ends: 104 [2018-09-30 23:44:21,333 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:44:21,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1337, Invalid=5305, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:44:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:44:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:44:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:44:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 23:44:21,345 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-30 23:44:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:21,345 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 23:44:21,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:44:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 23:44:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:44:21,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:21,346 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-30 23:44:21,346 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:21,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:21,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-09-30 23:44:21,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:21,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:21,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:21,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:21,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:21,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:21,620 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 [2018-09-30 23:44:21,627 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:44:21,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-30 23:44:21,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:21,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:21,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:21,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-30 23:44:21,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:44:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:44:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:44:21,844 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-30 23:44:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:22,136 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 23:44:22,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:44:22,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-30 23:44:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:22,137 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:44:22,138 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:44:22,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:44:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:44:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-30 23:44:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:44:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-30 23:44:22,151 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-30 23:44:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:22,152 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-30 23:44:22,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:44:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-30 23:44:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:44:22,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:22,153 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-30 23:44:22,153 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:22,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-09-30 23:44:22,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:22,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:22,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:22,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:22,768 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 [2018-09-30 23:44:22,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:22,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:23,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:23,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-30 23:44:23,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:44:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:44:23,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3843, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:44:23,854 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-09-30 23:44:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:24,981 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-30 23:44:24,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:44:24,981 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 23:44:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:24,982 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:44:24,982 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:44:24,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1497, Invalid=5985, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:44:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:44:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:44:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:44:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 23:44:24,991 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-30 23:44:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:24,992 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 23:44:24,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:44:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 23:44:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:44:24,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:24,992 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-30 23:44:24,992 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:24,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-09-30 23:44:24,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:24,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:24,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:24,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:24,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:25,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:25,456 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 [2018-09-30 23:44:25,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:44:25,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:44:25,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:25,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:25,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:25,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-30 23:44:25,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:44:25,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:44:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:44:25,567 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-30 23:44:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:26,074 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 23:44:26,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:44:26,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-30 23:44:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:26,075 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:44:26,075 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:44:26,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:44:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:44:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-30 23:44:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:44:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 23:44:26,085 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-30 23:44:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:26,085 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 23:44:26,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:44:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 23:44:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:44:26,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:26,086 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-30 23:44:26,086 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:26,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-09-30 23:44:26,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:26,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:26,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:26,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:26,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:26,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:26,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:26,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:26,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:44:26,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:26,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:27,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:27,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-30 23:44:27,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:44:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:44:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=4303, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:44:27,768 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-09-30 23:44:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:28,939 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 23:44:28,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:44:28,940 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 23:44:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:28,940 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:44:28,940 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:44:28,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1666, Invalid=6706, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:44:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:44:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:44:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:44:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 23:44:28,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-30 23:44:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:28,955 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 23:44:28,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:44:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 23:44:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:44:28,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:28,956 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-30 23:44:28,956 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:28,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-09-30 23:44:28,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:28,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:28,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:28,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:29,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:29,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:29,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:29,372 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:29,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:29,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:29,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:29,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-30 23:44:29,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:44:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:44:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:44:29,428 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-30 23:44:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:29,785 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 23:44:29,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:44:29,785 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-30 23:44:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:29,786 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:44:29,786 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:44:29,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:44:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:44:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-30 23:44:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:44:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-30 23:44:29,798 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-30 23:44:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:29,799 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-30 23:44:29,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:44:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-30 23:44:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:44:29,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:29,799 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-30 23:44:29,800 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:29,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-09-30 23:44:29,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:29,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:29,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:29,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:29,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:30,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:30,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:30,476 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:30,533 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:44:30,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:30,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:31,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:31,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-30 23:44:31,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:44:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:44:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=4789, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:44:31,872 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-09-30 23:44:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:32,930 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-30 23:44:32,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:44:32,930 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 23:44:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:32,930 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:44:32,931 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:44:32,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1844, Invalid=7468, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:44:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:44:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:44:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:44:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 23:44:32,942 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-30 23:44:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:32,943 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 23:44:32,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:44:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 23:44:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:44:32,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:32,943 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-30 23:44:32,944 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:32,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-09-30 23:44:32,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:32,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:32,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:32,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:32,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:33,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:33,255 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 [2018-09-30 23:44:33,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:44:33,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 23:44:33,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:33,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:33,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:33,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-30 23:44:33,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:44:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:44:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:44:33,368 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-30 23:44:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:33,917 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 23:44:33,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:44:33,917 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-30 23:44:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:33,918 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:44:33,918 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:44:33,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:44:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:44:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-30 23:44:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:44:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 23:44:33,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-30 23:44:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:33,935 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 23:44:33,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:44:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 23:44:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:44:33,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:33,935 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-30 23:44:33,936 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:33,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-09-30 23:44:33,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:33,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:33,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:33,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:33,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:34,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:34,679 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 [2018-09-30 23:44:34,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:34,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:35,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:35,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-30 23:44:35,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:44:35,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:44:35,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1341, Invalid=5301, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:44:35,977 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-09-30 23:44:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:37,632 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-30 23:44:37,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:44:37,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 23:44:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:37,634 INFO L225 Difference]: With dead ends: 128 [2018-09-30 23:44:37,634 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:44:37,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2031, Invalid=8271, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:44:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:44:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:44:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:44:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 23:44:37,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-30 23:44:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:37,646 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 23:44:37,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:44:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 23:44:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:44:37,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:37,647 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-30 23:44:37,647 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:37,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-09-30 23:44:37,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:37,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:37,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:37,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:37,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:38,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:38,058 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 [2018-09-30 23:44:38,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:44:38,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:44:38,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:38,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:38,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:38,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-30 23:44:38,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:44:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:44:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:44:38,179 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-30 23:44:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:38,562 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 23:44:38,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:44:38,562 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-30 23:44:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:38,564 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:44:38,564 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:44:38,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:44:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:44:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-30 23:44:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:44:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-30 23:44:38,579 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-30 23:44:38,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:38,579 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-30 23:44:38,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:44:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-30 23:44:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:44:38,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:38,580 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-30 23:44:38,580 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:38,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-09-30 23:44:38,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:38,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:38,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:38,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:38,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:39,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:39,822 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 [2018-09-30 23:44:39,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:39,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:44:39,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:39,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:41,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:41,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-30 23:44:41,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:44:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:44:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1471, Invalid=5839, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:44:41,300 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-09-30 23:44:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:42,658 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-30 23:44:42,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:44:42,658 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 23:44:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:42,658 INFO L225 Difference]: With dead ends: 134 [2018-09-30 23:44:42,659 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:44:42,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2227, Invalid=9115, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:44:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:44:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:44:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:44:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 23:44:42,672 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-30 23:44:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:42,672 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 23:44:42,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:44:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 23:44:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:44:42,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:42,672 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-30 23:44:42,673 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:42,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:42,673 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-09-30 23:44:42,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:42,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:42,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:42,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:42,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:43,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:43,064 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 [2018-09-30 23:44:43,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:43,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:43,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:43,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:43,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:43,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-30 23:44:43,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:44:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:44:43,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:44:43,187 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-30 23:44:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:43,595 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 23:44:43,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:44:43,596 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-30 23:44:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:43,597 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:44:43,597 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:44:43,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:44:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:44:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-30 23:44:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:44:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 23:44:43,612 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-30 23:44:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:43,612 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 23:44:43,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:44:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 23:44:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:44:43,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:43,613 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-30 23:44:43,613 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:43,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:43,613 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-09-30 23:44:43,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:43,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:43,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:43,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:43,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:44,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:44,450 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 [2018-09-30 23:44:44,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:44,530 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:44:44,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:44,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:46,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:46,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-09-30 23:44:46,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:44:46,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:44:46,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=6403, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:44:46,060 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-09-30 23:44:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:47,584 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 23:44:47,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:44:47,584 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 23:44:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:47,584 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:44:47,585 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:44:47,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2432, Invalid=10000, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:44:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:44:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:44:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:44:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 23:44:47,599 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-30 23:44:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:47,599 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 23:44:47,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:44:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 23:44:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:44:47,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:47,600 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-30 23:44:47,600 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:47,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-09-30 23:44:47,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:47,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:47,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:47,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:47,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:47,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:47,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:47,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:44:48,052 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-30 23:44:48,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:48,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:48,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:48,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-30 23:44:48,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:44:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:44:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:44:48,423 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-30 23:44:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:49,848 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 23:44:49,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:44:49,849 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-30 23:44:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:49,850 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:44:49,850 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:44:49,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:44:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:44:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-30 23:44:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:44:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-30 23:44:49,871 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-30 23:44:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:49,871 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-30 23:44:49,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:44:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-30 23:44:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:44:49,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:49,872 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-30 23:44:49,872 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:49,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-09-30 23:44:49,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:49,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:49,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:49,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:49,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:50,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:50,766 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 [2018-09-30 23:44:50,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:50,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:52,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:52,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-09-30 23:44:52,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:44:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:44:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=6993, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:44:52,663 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-09-30 23:44:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:54,452 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-30 23:44:54,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:44:54,452 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 23:44:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:54,453 INFO L225 Difference]: With dead ends: 146 [2018-09-30 23:44:54,453 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:44:54,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4786 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2646, Invalid=10926, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:44:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:44:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:44:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:44:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 23:44:54,466 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-30 23:44:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:54,467 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 23:44:54,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:44:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 23:44:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:44:54,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:54,468 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-30 23:44:54,468 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:54,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-09-30 23:44:54,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:54,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:54,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:54,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:44:54,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:55,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:55,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:44:55,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:44:55,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:44:55,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:55,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:55,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:55,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-30 23:44:55,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:44:55,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:44:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:44:55,164 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-30 23:44:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:55,630 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 23:44:55,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:44:55,631 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-30 23:44:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:55,631 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:44:55,631 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:44:55,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:44:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:44:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-30 23:44:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:44:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 23:44:55,648 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-30 23:44:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:55,648 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 23:44:55,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:44:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 23:44:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:44:55,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:55,649 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-30 23:44:55,649 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:55,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-09-30 23:44:55,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:55,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:55,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:55,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:55,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:56,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:56,984 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 [2018-09-30 23:44:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:57,068 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:44:57,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:57,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:58,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:58,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-09-30 23:44:58,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:44:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:44:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=7609, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:44:58,773 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-09-30 23:45:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:00,321 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-30 23:45:00,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:45:00,321 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 23:45:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:00,322 INFO L225 Difference]: With dead ends: 152 [2018-09-30 23:45:00,322 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:45:00,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2869, Invalid=11893, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:45:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:45:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:45:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:45:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 23:45:00,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-30 23:45:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:00,339 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 23:45:00,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:45:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 23:45:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:45:00,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:00,340 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-30 23:45:00,340 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:00,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:00,340 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-09-30 23:45:00,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:00,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:00,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:00,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:00,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:01,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:01,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:45:01,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:45:01,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:45:01,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:01,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:01,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:01,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-30 23:45:01,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:45:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:45:01,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:45:01,316 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-30 23:45:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:02,406 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 23:45:02,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:45:02,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-30 23:45:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:02,408 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:45:02,408 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:45:02,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:45:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:45:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-30 23:45:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:45:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-30 23:45:02,426 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-30 23:45:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:02,427 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-30 23:45:02,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:45:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-30 23:45:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:45:02,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:02,428 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-30 23:45:02,428 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:02,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-09-30 23:45:02,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:02,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:02,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:02,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:02,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:03,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:03,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:45:03,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:45:03,472 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:45:03,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:03,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:05,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:05,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-09-30 23:45:05,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:45:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:45:05,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=8251, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:45:05,297 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-09-30 23:45:06,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:06,727 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-30 23:45:06,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:45:06,727 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 23:45:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:06,728 INFO L225 Difference]: With dead ends: 158 [2018-09-30 23:45:06,728 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:45:06,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3101, Invalid=12901, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:45:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:45:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:45:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:45:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 23:45:06,751 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-30 23:45:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:06,751 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 23:45:06,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:45:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 23:45:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:45:06,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:06,752 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-30 23:45:06,752 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:06,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-09-30 23:45:06,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:06,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:06,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:06,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:06,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:07,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:07,595 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 [2018-09-30 23:45:07,602 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:07,678 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 23:45:07,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:07,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:07,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:07,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-30 23:45:07,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:45:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:45:07,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:45:07,958 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-30 23:45:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:08,521 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 23:45:08,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:45:08,521 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-30 23:45:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:08,522 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:45:08,522 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:45:08,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:45:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:45:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-30 23:45:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:45:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 23:45:08,542 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-30 23:45:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:08,543 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 23:45:08,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:45:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 23:45:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:45:08,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:08,544 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-30 23:45:08,544 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:08,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-09-30 23:45:08,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:08,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:08,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:08,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:08,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:09,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:09,655 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 [2018-09-30 23:45:09,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:09,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:11,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:11,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-09-30 23:45:11,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:45:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:45:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=8919, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:45:11,707 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-09-30 23:45:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:13,512 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 23:45:13,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:45:13,513 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 23:45:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:13,513 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:45:13,514 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:45:13,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6151 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3342, Invalid=13950, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:45:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:45:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:45:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:45:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 23:45:13,535 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-30 23:45:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:13,535 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 23:45:13,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:45:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 23:45:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:45:13,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:13,536 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-30 23:45:13,536 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:13,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-09-30 23:45:13,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:13,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:13,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:13,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:13,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:14,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:14,263 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 [2018-09-30 23:45:14,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:45:14,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:45:14,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:14,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:14,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:14,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-30 23:45:14,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:45:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:45:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:45:14,402 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-30 23:45:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:14,935 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-30 23:45:14,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:45:14,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-30 23:45:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:14,937 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:45:14,937 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:45:14,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:45:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:45:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-30 23:45:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:45:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-30 23:45:14,960 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-30 23:45:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:14,961 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-30 23:45:14,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:45:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-30 23:45:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:45:14,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:14,962 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-30 23:45:14,962 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:14,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:14,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-09-30 23:45:14,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:14,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:14,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:14,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:14,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:16,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:16,061 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 [2018-09-30 23:45:16,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:45:16,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:45:16,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:16,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:18,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:18,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-09-30 23:45:18,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:45:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:45:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2377, Invalid=9613, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:45:18,545 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-09-30 23:45:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:20,699 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-30 23:45:20,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:45:20,699 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 23:45:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:20,700 INFO L225 Difference]: With dead ends: 170 [2018-09-30 23:45:20,700 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:45:20,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6644 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3592, Invalid=15040, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:45:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:45:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:45:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:45:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 23:45:20,720 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-30 23:45:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:20,720 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 23:45:20,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:45:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 23:45:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:45:20,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:20,721 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-30 23:45:20,721 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:20,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-09-30 23:45:20,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:20,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:20,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:20,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:20,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:21,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:21,175 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 [2018-09-30 23:45:21,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:45:21,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:45:21,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:21,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:21,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:21,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-30 23:45:21,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:45:21,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:45:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:45:21,420 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-30 23:45:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:22,066 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-30 23:45:22,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:45:22,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-30 23:45:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:22,067 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:45:22,068 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:45:22,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:45:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:45:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-30 23:45:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:45:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 23:45:22,088 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-30 23:45:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:22,088 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 23:45:22,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:45:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 23:45:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:45:22,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:22,089 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-30 23:45:22,089 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:22,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-09-30 23:45:22,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:22,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:22,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:22,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:22,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:23,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:23,814 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 [2018-09-30 23:45:23,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:45:23,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:45:23,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:23,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:26,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:26,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-09-30 23:45:26,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:45:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:45:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=10333, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:45:26,133 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-09-30 23:45:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:27,239 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-30 23:45:27,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:45:27,239 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 23:45:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:27,240 INFO L225 Difference]: With dead ends: 176 [2018-09-30 23:45:27,240 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:45:27,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7156 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3851, Invalid=16171, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:45:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:45:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:45:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:45:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 23:45:27,261 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-30 23:45:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:27,261 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 23:45:27,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:45:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 23:45:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:45:27,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:27,261 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-30 23:45:27,262 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:27,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-09-30 23:45:27,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:27,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:27,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:27,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:27,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:27,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:27,954 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 [2018-09-30 23:45:27,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:28,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-30 23:45:28,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:28,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:28,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:28,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-30 23:45:28,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:45:28,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:45:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:45:28,217 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-30 23:45:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:28,817 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-30 23:45:28,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:45:28,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-30 23:45:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:28,818 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:45:28,818 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:45:28,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:45:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:45:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-30 23:45:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:45:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-30 23:45:28,839 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-30 23:45:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:28,840 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-30 23:45:28,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:45:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-30 23:45:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:45:28,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:28,840 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-30 23:45:28,840 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:28,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-09-30 23:45:28,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:28,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:28,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:28,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:28,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:30,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:30,350 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 [2018-09-30 23:45:30,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:30,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:33,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:33,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-09-30 23:45:33,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:45:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:45:33,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=11079, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:45:33,700 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-09-30 23:45:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:36,739 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-30 23:45:36,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:45:36,739 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 23:45:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:36,740 INFO L225 Difference]: With dead ends: 182 [2018-09-30 23:45:36,740 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:45:36,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4119, Invalid=17343, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:45:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:45:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:45:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:45:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-30 23:45:36,767 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-30 23:45:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:36,767 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-30 23:45:36,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:45:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-30 23:45:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:45:36,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:36,768 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-30 23:45:36,768 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:36,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-09-30 23:45:36,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:36,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:36,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:36,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:36,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:38,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:38,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:45:38,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:45:38,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:45:38,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:38,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:38,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:38,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-30 23:45:38,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:45:38,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:45:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:45:38,171 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-30 23:45:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:38,784 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-30 23:45:38,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:45:38,784 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-30 23:45:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:38,785 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:45:38,785 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:45:38,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:45:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:45:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-30 23:45:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:45:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-30 23:45:38,808 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-30 23:45:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:38,808 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-30 23:45:38,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:45:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-30 23:45:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:45:38,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:38,809 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-30 23:45:38,809 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:38,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-09-30 23:45:38,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:38,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:38,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:40,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:40,085 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 [2018-09-30 23:45:40,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:45:40,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:45:40,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:40,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:43,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:43,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-09-30 23:45:43,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:45:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:45:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=11851, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:45:43,064 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-09-30 23:45:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:46,309 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-30 23:45:46,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:45:46,309 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 23:45:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:46,309 INFO L225 Difference]: With dead ends: 188 [2018-09-30 23:45:46,310 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:45:46,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8237 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4396, Invalid=18556, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:45:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:45:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:45:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:45:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-30 23:45:46,330 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-30 23:45:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:46,331 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-30 23:45:46,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:45:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-30 23:45:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:45:46,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:46,331 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-30 23:45:46,331 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:46,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-09-30 23:45:46,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:46,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:46,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:46,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:46,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:47,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:47,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:45:47,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:45:47,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:45:47,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:47,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:47,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:47,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-30 23:45:47,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:45:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:45:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:45:47,583 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-30 23:45:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:48,396 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-30 23:45:48,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:45:48,396 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-30 23:45:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:48,397 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:45:48,398 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:45:48,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:45:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:45:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-30 23:45:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:45:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-30 23:45:48,425 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-30 23:45:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:48,425 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-30 23:45:48,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:45:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-30 23:45:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:45:48,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:48,426 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-30 23:45:48,426 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:48,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-09-30 23:45:48,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:48,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:48,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:48,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:48,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:49,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:49,856 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 [2018-09-30 23:45:49,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:45:49,966 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:45:49,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:49,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:52,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:52,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-09-30 23:45:52,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:45:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:45:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3101, Invalid=12649, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:45:52,641 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-09-30 23:45:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:55,628 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-30 23:45:55,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:45:55,628 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 23:45:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:55,629 INFO L225 Difference]: With dead ends: 194 [2018-09-30 23:45:55,629 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:45:55,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8806 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4682, Invalid=19810, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:45:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:45:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:45:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:45:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-30 23:45:55,653 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-30 23:45:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:55,653 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-30 23:45:55,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:45:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-30 23:45:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:45:55,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:55,654 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-30 23:45:55,654 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:55,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-09-30 23:45:55,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:55,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:55,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:55,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:55,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:56,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:56,163 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 [2018-09-30 23:45:56,170 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:56,275 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 23:45:56,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:56,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:56,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:56,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-30 23:45:56,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:45:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:45:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:45:56,356 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-30 23:45:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:57,044 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-30 23:45:57,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:45:57,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-30 23:45:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:57,045 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:45:57,045 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:45:57,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:45:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:45:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-30 23:45:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:45:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-30 23:45:57,070 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-30 23:45:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:57,071 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-30 23:45:57,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:45:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-30 23:45:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:45:57,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:57,071 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-30 23:45:57,071 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:57,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-09-30 23:45:57,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:57,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:57,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:57,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:57,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:58,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:58,679 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 [2018-09-30 23:45:58,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:58,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:01,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:01,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-09-30 23:46:01,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:46:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:46:01,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3297, Invalid=13473, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:46:01,547 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-09-30 23:46:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:03,288 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-30 23:46:03,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:46:03,288 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 23:46:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:03,289 INFO L225 Difference]: With dead ends: 200 [2018-09-30 23:46:03,289 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:46:03,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9394 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4977, Invalid=21105, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:46:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:46:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:46:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:46:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-30 23:46:03,313 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-30 23:46:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:03,314 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-30 23:46:03,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:46:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-30 23:46:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:46:03,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:03,314 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-30 23:46:03,315 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:03,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:03,315 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-09-30 23:46:03,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:03,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:03,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:03,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:03,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:03,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:03,905 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 [2018-09-30 23:46:03,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:46:03,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:46:03,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:03,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:04,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:04,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-30 23:46:04,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:46:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:46:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:46:04,202 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-30 23:46:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:04,967 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-30 23:46:04,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:46:04,967 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-30 23:46:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:04,968 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:46:04,968 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:46:04,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:46:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:46:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-30 23:46:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:46:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-30 23:46:04,995 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-30 23:46:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:04,995 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-30 23:46:04,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:46:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-30 23:46:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:46:04,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:04,996 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-30 23:46:04,996 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:04,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-09-30 23:46:04,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:04,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:04,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:04,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:04,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:06,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:06,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:46:06,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:46:06,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:46:06,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:06,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:09,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:09,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-09-30 23:46:09,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:46:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:46:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3499, Invalid=14323, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:46:09,864 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-09-30 23:46:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:13,923 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-30 23:46:13,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:46:13,923 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 23:46:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:13,924 INFO L225 Difference]: With dead ends: 206 [2018-09-30 23:46:13,924 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:46:13,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10001 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5281, Invalid=22441, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:46:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:46:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:46:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:46:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-30 23:46:13,951 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-30 23:46:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:13,951 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-30 23:46:13,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:46:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-30 23:46:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:46:13,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:13,952 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-30 23:46:13,952 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:13,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-09-30 23:46:13,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:13,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:13,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:13,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:13,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:14,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:14,517 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 [2018-09-30 23:46:14,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:46:14,611 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:46:14,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:14,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:14,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:14,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-30 23:46:14,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:46:14,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:46:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:46:14,700 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-30 23:46:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:15,442 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-30 23:46:15,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:46:15,442 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-30 23:46:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:15,443 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:46:15,443 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:46:15,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:46:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:46:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-30 23:46:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:46:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-30 23:46:15,475 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-30 23:46:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:15,475 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-30 23:46:15,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:46:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-30 23:46:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:46:15,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:15,476 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-30 23:46:15,476 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:15,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-09-30 23:46:15,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:15,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:15,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:15,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:15,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:17,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:17,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:46:17,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:46:17,166 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:46:17,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:17,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:20,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:20,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-09-30 23:46:20,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:46:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:46:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3707, Invalid=15199, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:46:20,516 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-09-30 23:46:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:23,570 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-30 23:46:23,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:46:23,570 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 23:46:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:23,571 INFO L225 Difference]: With dead ends: 212 [2018-09-30 23:46:23,571 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:46:23,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10627 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5594, Invalid=23818, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:46:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:46:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:46:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:46:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-30 23:46:23,599 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-30 23:46:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:23,599 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-30 23:46:23,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:46:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-30 23:46:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:46:23,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:23,600 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-30 23:46:23,600 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:23,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-09-30 23:46:23,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:23,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:23,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:23,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:23,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:24,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:24,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:46:24,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:46:24,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-30 23:46:24,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:24,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:24,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:24,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-30 23:46:24,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:46:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:46:24,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:46:24,564 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-30 23:46:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:25,341 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-30 23:46:25,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:46:25,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-30 23:46:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:25,343 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:46:25,343 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:46:25,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:46:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:46:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-30 23:46:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:46:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-30 23:46:25,372 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-30 23:46:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:25,372 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-30 23:46:25,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:46:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-30 23:46:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:46:25,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:25,373 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-30 23:46:25,373 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:25,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-09-30 23:46:25,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:25,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:25,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:25,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:25,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:26,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:26,987 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 [2018-09-30 23:46:27,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:27,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:30,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:30,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-09-30 23:46:30,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:46:30,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:46:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=16101, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:46:30,635 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-09-30 23:46:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:34,831 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-30 23:46:34,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:46:34,831 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 23:46:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:34,832 INFO L225 Difference]: With dead ends: 218 [2018-09-30 23:46:34,832 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:46:34,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11272 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5916, Invalid=25236, Unknown=0, NotChecked=0, Total=31152 [2018-09-30 23:46:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:46:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:46:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:46:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-30 23:46:34,864 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-30 23:46:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:34,865 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-30 23:46:34,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:46:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-30 23:46:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:46:34,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:34,866 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-30 23:46:34,866 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:34,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-09-30 23:46:34,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:34,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:34,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:34,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:34,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:35,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:35,516 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 [2018-09-30 23:46:35,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:46:35,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:46:35,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:35,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:35,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:35,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-30 23:46:35,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:46:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:46:35,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:46:35,683 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-30 23:46:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:36,501 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-30 23:46:36,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:46:36,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-30 23:46:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:36,502 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:46:36,503 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:46:36,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:46:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:46:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-30 23:46:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:46:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-30 23:46:36,543 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-30 23:46:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:36,543 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-30 23:46:36,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:46:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-30 23:46:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:46:36,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:36,544 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-30 23:46:36,545 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:36,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-09-30 23:46:36,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:36,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:36,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:36,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:36,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:38,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:38,275 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 [2018-09-30 23:46:38,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:46:38,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:46:38,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:38,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:42,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:42,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-09-30 23:46:42,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:46:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:46:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=17029, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:46:42,055 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-09-30 23:46:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:46,055 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-30 23:46:46,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:46:46,055 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 23:46:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:46,056 INFO L225 Difference]: With dead ends: 224 [2018-09-30 23:46:46,056 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:46:46,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11936 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6247, Invalid=26695, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:46:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:46:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:46:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:46:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-30 23:46:46,093 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-30 23:46:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:46,093 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-30 23:46:46,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:46:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-30 23:46:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:46:46,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:46,094 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-30 23:46:46,095 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:46,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-09-30 23:46:46,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:46,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:46,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:46,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:46,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:46,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:46,816 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 [2018-09-30 23:46:46,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:46:46,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:46:46,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:46,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:47,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:47,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-30 23:46:47,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:46:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:46:47,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:46:47,034 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-30 23:46:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:47,896 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-30 23:46:47,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:46:47,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-30 23:46:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:47,897 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:46:47,897 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:46:47,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:46:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:46:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-30 23:46:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:46:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-30 23:46:47,935 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-30 23:46:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:47,935 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-30 23:46:47,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:46:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-30 23:46:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:46:47,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:47,936 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-30 23:46:47,936 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:47,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-09-30 23:46:47,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:47,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:47,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:47,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:49,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:49,996 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 [2018-09-30 23:46:50,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:46:50,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:46:50,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:50,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:53,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:53,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-09-30 23:46:53,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:46:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:46:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4367, Invalid=17983, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:46:53,831 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-09-30 23:46:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:57,867 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-30 23:46:57,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:46:57,867 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-30 23:46:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:57,868 INFO L225 Difference]: With dead ends: 230 [2018-09-30 23:46:57,868 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:46:57,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12619 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6587, Invalid=28195, Unknown=0, NotChecked=0, Total=34782 [2018-09-30 23:46:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:46:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:46:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:46:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-30 23:46:57,907 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-30 23:46:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:57,907 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-30 23:46:57,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:46:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-30 23:46:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:46:57,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:57,908 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-30 23:46:57,908 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:57,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-09-30 23:46:57,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:57,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:57,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:57,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:57,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:58,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:58,593 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 [2018-09-30 23:46:58,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:46:58,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 23:46:58,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:58,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:58,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:58,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-30 23:46:58,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:46:58,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:46:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:46:58,814 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-30 23:46:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:59,845 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-30 23:46:59,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:46:59,846 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-30 23:46:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:59,847 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:46:59,847 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:46:59,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:46:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:46:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-30 23:46:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:46:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-30 23:46:59,879 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-30 23:46:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:59,879 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-30 23:46:59,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:46:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-30 23:46:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:46:59,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:59,880 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-30 23:46:59,880 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:59,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-09-30 23:46:59,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:59,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:59,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:59,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:59,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:01,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:01,860 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 [2018-09-30 23:47:01,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:01,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:05,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:05,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-09-30 23:47:05,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:47:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:47:05,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4599, Invalid=18963, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:47:05,934 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-09-30 23:47:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:10,757 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-30 23:47:10,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:47:10,757 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-30 23:47:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:10,758 INFO L225 Difference]: With dead ends: 236 [2018-09-30 23:47:10,758 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:47:10,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13321 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6936, Invalid=29736, Unknown=0, NotChecked=0, Total=36672 [2018-09-30 23:47:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:47:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:47:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:47:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-30 23:47:10,793 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-30 23:47:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:10,793 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-30 23:47:10,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:47:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-30 23:47:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:47:10,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:10,794 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-30 23:47:10,794 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:10,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-09-30 23:47:10,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:10,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:10,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:10,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:10,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:11,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:11,522 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 [2018-09-30 23:47:11,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:11,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:11,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:11,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:11,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:11,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-30 23:47:11,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:47:11,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:47:11,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:47:11,725 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-30 23:47:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:12,644 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-30 23:47:12,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:47:12,644 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-30 23:47:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:12,645 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:47:12,645 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:47:12,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:47:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:47:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-30 23:47:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:47:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-30 23:47:12,688 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-30 23:47:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:12,688 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-30 23:47:12,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:47:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-30 23:47:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:47:12,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:12,689 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-30 23:47:12,689 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:12,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-09-30 23:47:12,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:12,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:12,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:12,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:14,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:14,709 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 [2018-09-30 23:47:14,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:14,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:47:14,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:14,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:19,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:19,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-09-30 23:47:19,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:47:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:47:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4837, Invalid=19969, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:47:19,127 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-09-30 23:47:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:23,346 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-30 23:47:23,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:47:23,346 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-09-30 23:47:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:23,347 INFO L225 Difference]: With dead ends: 242 [2018-09-30 23:47:23,347 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:47:23,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7294, Invalid=31318, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 23:47:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:47:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:47:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:47:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-30 23:47:23,385 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-30 23:47:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:23,386 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-30 23:47:23,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:47:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-30 23:47:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:47:23,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:23,387 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-30 23:47:23,387 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:23,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-09-30 23:47:23,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:23,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:23,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:23,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:23,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:24,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:24,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:47:24,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:47:24,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:47:24,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:24,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:24,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:24,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-30 23:47:24,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:47:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:47:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:47:24,420 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-30 23:47:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:25,495 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-30 23:47:25,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:47:25,496 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-30 23:47:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:25,497 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:47:25,497 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:47:25,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:47:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:47:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-30 23:47:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:47:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-30 23:47:25,534 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-30 23:47:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:25,535 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-30 23:47:25,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:47:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-30 23:47:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:47:25,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:25,536 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-30 23:47:25,536 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:25,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-09-30 23:47:25,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:25,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:25,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:25,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:25,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:27,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:27,700 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 [2018-09-30 23:47:27,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:47:27,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:47:27,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:27,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:32,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:32,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-09-30 23:47:32,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:47:32,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:47:32,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5081, Invalid=21001, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:47:32,407 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-09-30 23:47:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:34,587 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-30 23:47:34,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:47:34,587 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-09-30 23:47:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:34,588 INFO L225 Difference]: With dead ends: 248 [2018-09-30 23:47:34,588 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:47:34,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14782 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7661, Invalid=32941, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:47:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:47:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:47:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:47:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-30 23:47:34,628 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-30 23:47:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:34,628 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-30 23:47:34,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:47:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-30 23:47:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:47:34,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:34,629 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-30 23:47:34,629 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:34,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-09-30 23:47:34,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:34,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:34,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:34,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:34,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:35,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:35,761 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 [2018-09-30 23:47:35,768 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:47:35,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-30 23:47:35,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:35,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:36,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:36,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-30 23:47:36,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:47:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:47:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:47:36,079 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-30 23:47:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:37,104 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-30 23:47:37,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:47:37,104 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-30 23:47:37,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:37,106 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:47:37,106 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:47:37,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:47:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:47:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-30 23:47:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:47:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-30 23:47:37,145 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-30 23:47:37,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:37,145 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-30 23:47:37,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:47:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-30 23:47:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:47:37,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:37,146 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-30 23:47:37,146 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:37,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:37,146 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-09-30 23:47:37,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:37,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:37,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:37,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:37,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:39,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:39,364 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 [2018-09-30 23:47:39,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:39,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:44,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:44,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 165 [2018-09-30 23:47:44,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:47:44,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:47:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5331, Invalid=22059, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:47:44,243 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 166 states. [2018-09-30 23:47:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:47,972 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-09-30 23:47:47,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:47:47,972 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-09-30 23:47:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:47,973 INFO L225 Difference]: With dead ends: 254 [2018-09-30 23:47:47,973 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:47:47,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15541 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8037, Invalid=34605, Unknown=0, NotChecked=0, Total=42642 [2018-09-30 23:47:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:47:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:47:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:47:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-30 23:47:48,013 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-09-30 23:47:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:48,013 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-30 23:47:48,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:47:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-30 23:47:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:47:48,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:48,014 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-30 23:47:48,014 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:48,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash -436388571, now seen corresponding path program 80 times [2018-09-30 23:47:48,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:48,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:48,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:48,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:48,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:48,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:48,851 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 [2018-09-30 23:47:48,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:48,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:48,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:48,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:49,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:49,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-09-30 23:47:49,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:47:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:47:49,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:47:49,066 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-09-30 23:47:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:50,113 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-30 23:47:50,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:47:50,113 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-09-30 23:47:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:50,114 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:47:50,114 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:47:50,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:47:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:47:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-09-30 23:47:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:47:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-30 23:47:50,154 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-30 23:47:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:50,154 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-30 23:47:50,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:47:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-30 23:47:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:47:50,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:50,155 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-30 23:47:50,155 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:50,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 81 times [2018-09-30 23:47:50,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:50,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:50,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:50,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:50,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:52,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:52,691 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 [2018-09-30 23:47:52,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:52,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:47:52,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:52,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:57,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:57,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 169 [2018-09-30 23:47:57,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:47:57,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:47:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5587, Invalid=23143, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:47:57,870 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 170 states. [2018-09-30 23:48:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:03,208 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-30 23:48:03,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:48:03,208 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-09-30 23:48:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:03,209 INFO L225 Difference]: With dead ends: 260 [2018-09-30 23:48:03,209 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:48:03,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16319 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=8422, Invalid=36310, Unknown=0, NotChecked=0, Total=44732 [2018-09-30 23:48:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:48:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:48:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:48:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-30 23:48:03,250 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-30 23:48:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:03,250 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-30 23:48:03,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:48:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-30 23:48:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:48:03,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:03,251 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-30 23:48:03,251 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:03,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1739485543, now seen corresponding path program 82 times [2018-09-30 23:48:03,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:03,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:03,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:03,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:04,167 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 [2018-09-30 23:48:04,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:04,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:04,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:04,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:04,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-30 23:48:04,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:48:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:48:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:48:04,380 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-30 23:48:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:05,454 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-30 23:48:05,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:48:05,455 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-30 23:48:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:05,456 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:48:05,456 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:48:05,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:48:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:48:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-30 23:48:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:48:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-30 23:48:05,506 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-09-30 23:48:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:05,506 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-30 23:48:05,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:48:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-30 23:48:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:48:05,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:05,508 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-30 23:48:05,508 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:05,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 83 times [2018-09-30 23:48:05,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:05,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:05,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:05,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:08,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:08,171 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 [2018-09-30 23:48:08,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:08,343 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:48:08,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:08,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:13,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:13,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 173 [2018-09-30 23:48:13,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-09-30 23:48:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-09-30 23:48:13,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5849, Invalid=24253, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:48:13,563 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 174 states. [2018-09-30 23:48:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:16,654 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-09-30 23:48:16,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:48:16,654 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-09-30 23:48:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:16,655 INFO L225 Difference]: With dead ends: 266 [2018-09-30 23:48:16,655 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:48:16,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17116 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=8816, Invalid=38056, Unknown=0, NotChecked=0, Total=46872 [2018-09-30 23:48:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:48:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:48:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:48:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-30 23:48:16,698 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-09-30 23:48:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:16,699 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-30 23:48:16,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-09-30 23:48:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-30 23:48:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:48:16,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:16,700 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-30 23:48:16,700 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:16,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:16,700 INFO L82 PathProgramCache]: Analyzing trace with hash 878421517, now seen corresponding path program 84 times [2018-09-30 23:48:16,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:16,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:16,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:17,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:17,590 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 [2018-09-30 23:48:17,613 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:17,777 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 23:48:17,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:17,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:17,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:17,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-09-30 23:48:17,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:48:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:48:17,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:48:17,881 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-09-30 23:48:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:19,011 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-30 23:48:19,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:48:19,011 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-09-30 23:48:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:19,013 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:48:19,013 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:48:19,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:48:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:48:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-30 23:48:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:48:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-30 23:48:19,058 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-30 23:48:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:19,058 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-30 23:48:19,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:48:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-30 23:48:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:48:19,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:19,059 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-30 23:48:19,060 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:19,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 85 times [2018-09-30 23:48:19,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:19,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:19,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:19,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:19,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:21,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:21,832 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 [2018-09-30 23:48:21,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:21,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:27,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:27,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 177 [2018-09-30 23:48:27,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-09-30 23:48:27,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-09-30 23:48:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=25389, Unknown=0, NotChecked=0, Total=31506 [2018-09-30 23:48:27,385 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 178 states. [2018-09-30 23:48:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:31,774 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-09-30 23:48:31,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:48:31,775 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 178 [2018-09-30 23:48:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:31,775 INFO L225 Difference]: With dead ends: 272 [2018-09-30 23:48:31,775 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:48:31,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17932 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=9219, Invalid=39843, Unknown=0, NotChecked=0, Total=49062 [2018-09-30 23:48:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:48:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:48:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:48:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-30 23:48:31,820 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-30 23:48:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:31,821 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-30 23:48:31,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-09-30 23:48:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-30 23:48:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:48:31,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:31,821 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-30 23:48:31,822 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:31,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:31,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1398834049, now seen corresponding path program 86 times [2018-09-30 23:48:31,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:31,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:31,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:31,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:31,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:32,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:32,840 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 [2018-09-30 23:48:32,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:32,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:32,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:32,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:33,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:33,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-30 23:48:33,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:48:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:48:33,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:48:33,078 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-30 23:48:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:34,249 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-09-30 23:48:34,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:48:34,249 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-30 23:48:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:34,250 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:48:34,250 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:48:34,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:48:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:48:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-09-30 23:48:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:48:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-30 23:48:34,297 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-09-30 23:48:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:34,298 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-30 23:48:34,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:48:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-30 23:48:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:48:34,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:34,299 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-30 23:48:34,299 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:34,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 87 times [2018-09-30 23:48:34,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:34,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:34,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:34,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:34,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:37,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:37,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:48:37,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:37,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 23:48:37,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:37,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:43,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:43,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 181 [2018-09-30 23:48:43,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-09-30 23:48:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-09-30 23:48:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6391, Invalid=26551, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:48:43,135 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 182 states. [2018-09-30 23:48:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:46,611 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-09-30 23:48:46,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:48:46,611 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 182 [2018-09-30 23:48:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:46,612 INFO L225 Difference]: With dead ends: 278 [2018-09-30 23:48:46,612 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:48:46,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18767 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=9631, Invalid=41671, Unknown=0, NotChecked=0, Total=51302 [2018-09-30 23:48:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:48:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:48:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:48:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-30 23:48:46,662 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-09-30 23:48:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:46,662 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-30 23:48:46,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-09-30 23:48:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-30 23:48:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:48:46,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:46,663 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-30 23:48:46,663 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:46,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1579493109, now seen corresponding path program 88 times [2018-09-30 23:48:46,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:46,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:46,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:46,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:46,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:48,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:48,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:48:48,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:48,265 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:48,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:48,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:48,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:48,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-09-30 23:48:48,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:48:48,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:48:48,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:48:48,372 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-09-30 23:48:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:49,566 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-09-30 23:48:49,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:48:49,567 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-09-30 23:48:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:49,568 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:48:49,568 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:48:49,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:48:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:48:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-09-30 23:48:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:48:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-30 23:48:49,618 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-30 23:48:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:49,618 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-30 23:48:49,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:48:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-30 23:48:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:48:49,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:49,619 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-30 23:48:49,619 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:49,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:49,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 89 times [2018-09-30 23:48:49,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:49,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:49,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:49,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:49,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:52,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:52,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:52,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:52,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:48:52,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:52,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:58,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:58,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 185 [2018-09-30 23:48:58,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-09-30 23:48:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-09-30 23:48:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6671, Invalid=27739, Unknown=0, NotChecked=0, Total=34410 [2018-09-30 23:48:58,808 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 186 states. [2018-09-30 23:49:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:03,912 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-09-30 23:49:03,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:49:03,912 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 186 [2018-09-30 23:49:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:03,913 INFO L225 Difference]: With dead ends: 284 [2018-09-30 23:49:03,913 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:49:03,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19621 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=10052, Invalid=43540, Unknown=0, NotChecked=0, Total=53592 [2018-09-30 23:49:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:49:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:49:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:49:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-30 23:49:03,962 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-30 23:49:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:03,962 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-30 23:49:03,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-09-30 23:49:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-30 23:49:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:49:03,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:03,963 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-30 23:49:03,963 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:03,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1290702953, now seen corresponding path program 90 times [2018-09-30 23:49:03,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:03,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:03,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:03,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:03,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:05,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:05,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:05,017 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:05,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-30 23:49:05,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:05,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:05,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:05,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-30 23:49:05,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:49:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:49:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:49:05,315 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-30 23:49:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:06,589 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-09-30 23:49:06,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:49:06,589 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-30 23:49:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:06,590 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:49:06,591 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:49:06,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:49:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:49:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-09-30 23:49:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:49:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-30 23:49:06,640 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-09-30 23:49:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:06,641 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-30 23:49:06,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:49:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-30 23:49:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:49:06,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:06,641 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-30 23:49:06,642 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:06,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:06,642 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 91 times [2018-09-30 23:49:06,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:06,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:06,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:06,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:06,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:09,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:09,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:09,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:09,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:15,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:15,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 189 [2018-09-30 23:49:15,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-09-30 23:49:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-09-30 23:49:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6957, Invalid=28953, Unknown=0, NotChecked=0, Total=35910 [2018-09-30 23:49:15,928 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 190 states. [2018-09-30 23:49:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:20,578 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-09-30 23:49:20,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:49:20,578 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 190 [2018-09-30 23:49:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:20,579 INFO L225 Difference]: With dead ends: 290 [2018-09-30 23:49:20,579 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:49:20,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20494 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=10482, Invalid=45450, Unknown=0, NotChecked=0, Total=55932 [2018-09-30 23:49:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:49:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:49:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:49:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-30 23:49:20,631 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-09-30 23:49:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:20,631 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-30 23:49:20,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-09-30 23:49:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-30 23:49:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:49:20,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:20,632 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-30 23:49:20,632 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:20,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1736556509, now seen corresponding path program 92 times [2018-09-30 23:49:20,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:20,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:20,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:20,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:20,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:21,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:21,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:21,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:21,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:21,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:21,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:21,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:21,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-09-30 23:49:21,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:49:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:49:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:49:21,951 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-09-30 23:49:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:23,402 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-09-30 23:49:23,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:49:23,403 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-09-30 23:49:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:23,404 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:49:23,404 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:49:23,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:49:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:49:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-30 23:49:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:49:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-30 23:49:23,456 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-30 23:49:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:23,456 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-30 23:49:23,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:49:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-30 23:49:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:49:23,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:23,457 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-30 23:49:23,457 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:23,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 93 times [2018-09-30 23:49:23,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:23,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:23,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:23,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:23,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:26,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:26,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:26,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:26,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:49:26,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:26,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:32,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:32,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2018-09-30 23:49:32,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-09-30 23:49:32,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-09-30 23:49:32,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7249, Invalid=30193, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:49:32,995 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 194 states. [2018-09-30 23:49:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:37,694 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-09-30 23:49:37,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:49:37,694 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 194 [2018-09-30 23:49:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:37,694 INFO L225 Difference]: With dead ends: 296 [2018-09-30 23:49:37,695 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:49:37,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21386 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=10921, Invalid=47401, Unknown=0, NotChecked=0, Total=58322 [2018-09-30 23:49:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:49:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:49:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:49:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-30 23:49:37,747 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-30 23:49:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:37,747 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-30 23:49:37,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-09-30 23:49:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-30 23:49:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:49:37,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:37,748 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-30 23:49:37,748 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:37,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash 86226257, now seen corresponding path program 94 times [2018-09-30 23:49:37,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:37,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:37,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:39,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:39,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:39,034 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:39,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:39,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:39,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:39,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:39,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-30 23:49:39,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:49:39,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:49:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:49:39,301 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-30 23:49:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:40,629 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-09-30 23:49:40,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:49:40,629 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-30 23:49:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:40,630 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:49:40,631 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:49:40,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:49:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:49:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-30 23:49:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:49:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-30 23:49:40,685 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-09-30 23:49:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:40,685 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-30 23:49:40,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:49:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-30 23:49:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:49:40,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:40,686 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-30 23:49:40,686 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:40,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 95 times [2018-09-30 23:49:40,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:40,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:40,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:40,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:40,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:44,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:44,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:44,130 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:44,332 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:49:44,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:44,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:50,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:50,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 197 [2018-09-30 23:49:50,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-09-30 23:49:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-09-30 23:49:50,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7547, Invalid=31459, Unknown=0, NotChecked=0, Total=39006 [2018-09-30 23:49:50,805 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 198 states. [2018-09-30 23:49:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:57,518 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-09-30 23:49:57,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:49:57,518 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 198 [2018-09-30 23:49:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:57,519 INFO L225 Difference]: With dead ends: 302 [2018-09-30 23:49:57,519 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:49:57,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22297 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=11369, Invalid=49393, Unknown=0, NotChecked=0, Total=60762 [2018-09-30 23:49:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:49:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:49:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:49:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-30 23:49:57,573 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-09-30 23:49:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:57,574 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-30 23:49:57,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-09-30 23:49:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-30 23:49:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:49:57,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:57,574 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-30 23:49:57,575 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:57,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1285124293, now seen corresponding path program 96 times [2018-09-30 23:49:57,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:57,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:57,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:57,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:57,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:58,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:58,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:58,812 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:59,021 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 23:49:59,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:59,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:59,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:59,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-09-30 23:49:59,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:49:59,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:49:59,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:49:59,164 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-09-30 23:50:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:00,474 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-09-30 23:50:00,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:50:00,475 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-09-30 23:50:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:00,476 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:50:00,476 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:50:00,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:50:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:50:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-09-30 23:50:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:50:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-30 23:50:00,548 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-30 23:50:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:00,549 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-30 23:50:00,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:50:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-30 23:50:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:50:00,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:00,550 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-30 23:50:00,550 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:00,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 97 times [2018-09-30 23:50:00,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:00,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:00,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:00,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:00,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:03,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:03,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:03,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:03,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:10,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:10,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 201 [2018-09-30 23:50:10,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-09-30 23:50:10,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-09-30 23:50:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7851, Invalid=32751, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:50:10,913 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 202 states. [2018-09-30 23:50:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:16,808 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-09-30 23:50:16,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:50:16,808 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 202 [2018-09-30 23:50:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:16,809 INFO L225 Difference]: With dead ends: 308 [2018-09-30 23:50:16,809 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:50:16,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23227 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=11826, Invalid=51426, Unknown=0, NotChecked=0, Total=63252 [2018-09-30 23:50:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:50:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:50:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:50:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-09-30 23:50:16,866 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-09-30 23:50:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:16,867 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-09-30 23:50:16,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-09-30 23:50:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-09-30 23:50:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:50:16,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:16,868 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-09-30 23:50:16,868 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:16,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash -198708679, now seen corresponding path program 98 times [2018-09-30 23:50:16,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:16,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:16,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:16,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:16,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:18,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:18,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:18,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:18,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:18,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:18,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:18,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:18,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-09-30 23:50:18,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:50:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:50:18,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:50:18,315 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-09-30 23:50:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:19,886 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-09-30 23:50:19,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:50:19,887 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-09-30 23:50:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:19,888 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:50:19,888 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:50:19,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:50:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:50:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-09-30 23:50:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:50:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-30 23:50:19,947 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-09-30 23:50:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:19,947 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-30 23:50:19,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:50:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-30 23:50:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:50:19,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:19,948 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-30 23:50:19,948 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:19,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 99 times [2018-09-30 23:50:19,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:19,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:19,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:19,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:19,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:23,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:23,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:23,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:23,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 23:50:23,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:23,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:30,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:30,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 205 [2018-09-30 23:50:30,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-09-30 23:50:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-09-30 23:50:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8161, Invalid=34069, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:50:30,978 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 206 states. [2018-09-30 23:50:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:36,647 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2018-09-30 23:50:36,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:50:36,647 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 206 [2018-09-30 23:50:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:36,648 INFO L225 Difference]: With dead ends: 314 [2018-09-30 23:50:36,648 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:50:36,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24176 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=12292, Invalid=53500, Unknown=0, NotChecked=0, Total=65792 [2018-09-30 23:50:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:50:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 23:50:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:50:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-09-30 23:50:36,710 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2018-09-30 23:50:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:36,710 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-09-30 23:50:36,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-09-30 23:50:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-09-30 23:50:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:50:36,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:36,711 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-09-30 23:50:36,711 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:36,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash 26491309, now seen corresponding path program 100 times [2018-09-30 23:50:36,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:36,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:36,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:36,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:36,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:37,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:37,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:37,974 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:38,115 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:38,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:38,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:38,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:38,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2018-09-30 23:50:38,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:50:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:50:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=1702, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:50:38,269 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 57 states. [2018-09-30 23:50:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:39,626 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-09-30 23:50:39,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:50:39,626 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 208 [2018-09-30 23:50:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:39,627 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:50:39,627 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:50:39,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4403, Invalid=7369, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:50:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:50:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2018-09-30 23:50:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:50:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-09-30 23:50:39,688 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-09-30 23:50:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:39,688 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-09-30 23:50:39,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:50:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-09-30 23:50:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:50:39,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:39,689 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-09-30 23:50:39,689 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:39,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:39,690 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 101 times [2018-09-30 23:50:39,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:39,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:39,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:39,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:39,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:43,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:43,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:43,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:43,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 23:50:43,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:43,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:51,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:51,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 209 [2018-09-30 23:50:51,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-09-30 23:50:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-09-30 23:50:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8477, Invalid=35413, Unknown=0, NotChecked=0, Total=43890 [2018-09-30 23:50:51,188 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 210 states. [2018-09-30 23:50:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:57,303 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2018-09-30 23:50:57,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:50:57,303 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 210 [2018-09-30 23:50:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:57,304 INFO L225 Difference]: With dead ends: 320 [2018-09-30 23:50:57,304 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 23:50:57,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25144 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=12767, Invalid=55615, Unknown=0, NotChecked=0, Total=68382 [2018-09-30 23:50:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 23:50:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 23:50:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:50:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-09-30 23:50:57,375 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-09-30 23:50:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:57,375 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-09-30 23:50:57,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-09-30 23:50:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-09-30 23:50:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:50:57,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:57,376 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-09-30 23:50:57,376 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:57,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:57,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1977399519, now seen corresponding path program 102 times [2018-09-30 23:50:57,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:57,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:57,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:57,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:57,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:58,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:58,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:58,720 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:58,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-09-30 23:50:58,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:58,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:59,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2018-09-30 23:50:59,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:50:59,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:50:59,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:50:59,097 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 58 states. [2018-09-30 23:51:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:00,786 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2018-09-30 23:51:00,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:51:00,786 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 212 [2018-09-30 23:51:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:00,787 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:51:00,787 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:51:00,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:51:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:51:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-09-30 23:51:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:51:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-09-30 23:51:00,854 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2018-09-30 23:51:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:00,854 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-09-30 23:51:00,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:51:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-09-30 23:51:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:51:00,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:00,855 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-09-30 23:51:00,855 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:00,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 103 times [2018-09-30 23:51:00,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:00,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:00,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:00,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:00,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2756 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:04,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:04,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:04,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:04,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2756 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:12,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:12,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 213 [2018-09-30 23:51:12,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-09-30 23:51:12,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-09-30 23:51:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8799, Invalid=36783, Unknown=0, NotChecked=0, Total=45582 [2018-09-30 23:51:12,537 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 214 states. [2018-09-30 23:51:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:19,737 INFO L93 Difference]: Finished difference Result 326 states and 328 transitions. [2018-09-30 23:51:19,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:51:19,737 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 214 [2018-09-30 23:51:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:19,737 INFO L225 Difference]: With dead ends: 326 [2018-09-30 23:51:19,737 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 23:51:19,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26131 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=13251, Invalid=57771, Unknown=0, NotChecked=0, Total=71022 [2018-09-30 23:51:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 23:51:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 23:51:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:51:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-09-30 23:51:19,811 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2018-09-30 23:51:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:19,811 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-09-30 23:51:19,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-09-30 23:51:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-09-30 23:51:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:51:19,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:19,812 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-09-30 23:51:19,812 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:19,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1922701973, now seen corresponding path program 104 times [2018-09-30 23:51:19,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:19,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:19,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:19,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:19,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:21,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:21,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:21,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:21,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:21,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:21,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2018-09-30 23:51:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:51:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:51:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=1821, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:51:21,744 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 59 states. [2018-09-30 23:51:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:23,228 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2018-09-30 23:51:23,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:51:23,229 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 216 [2018-09-30 23:51:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:23,230 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:51:23,230 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:51:23,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4734, Invalid=7922, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:51:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:51:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-09-30 23:51:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:51:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-09-30 23:51:23,304 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-09-30 23:51:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:23,304 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-09-30 23:51:23,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:51:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-09-30 23:51:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:51:23,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:23,305 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-09-30 23:51:23,306 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:23,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:23,306 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 105 times [2018-09-30 23:51:23,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:23,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:23,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:23,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:23,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:27,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:27,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:27,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:27,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:51:27,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:27,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:35,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:35,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 217 [2018-09-30 23:51:35,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-09-30 23:51:35,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-09-30 23:51:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9127, Invalid=38179, Unknown=0, NotChecked=0, Total=47306 [2018-09-30 23:51:35,618 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 218 states. [2018-09-30 23:51:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:44,793 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2018-09-30 23:51:44,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:51:44,793 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 218 [2018-09-30 23:51:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:44,794 INFO L225 Difference]: With dead ends: 332 [2018-09-30 23:51:44,794 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:51:44,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27137 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=13744, Invalid=59968, Unknown=0, NotChecked=0, Total=73712 [2018-09-30 23:51:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:51:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:51:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:51:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-09-30 23:51:44,863 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-09-30 23:51:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:44,863 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-09-30 23:51:44,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-09-30 23:51:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-09-30 23:51:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 23:51:44,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:44,864 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-09-30 23:51:44,864 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:44,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash 792572937, now seen corresponding path program 106 times [2018-09-30 23:51:44,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:44,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:44,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:44,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:44,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:46,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:46,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:46,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:46,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:46,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:46,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:46,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:46,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2018-09-30 23:51:46,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:51:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:51:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:51:46,584 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 60 states. [2018-09-30 23:51:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:48,150 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-09-30 23:51:48,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:51:48,150 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 220 [2018-09-30 23:51:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:48,151 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:51:48,151 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:51:48,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:51:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:51:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2018-09-30 23:51:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:51:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-09-30 23:51:48,244 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2018-09-30 23:51:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:48,244 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-09-30 23:51:48,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:51:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-09-30 23:51:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:51:48,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:48,245 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-09-30 23:51:48,246 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:48,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 107 times [2018-09-30 23:51:48,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:48,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:48,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:48,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:48,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2970 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:52,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:52,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:52,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:52,762 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:51:52,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:52,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2970 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:00,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:00,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 221 [2018-09-30 23:52:00,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-09-30 23:52:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-09-30 23:52:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9461, Invalid=39601, Unknown=0, NotChecked=0, Total=49062 [2018-09-30 23:52:00,924 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 222 states. [2018-09-30 23:52:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:07,361 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2018-09-30 23:52:07,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:52:07,361 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 222 [2018-09-30 23:52:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:07,362 INFO L225 Difference]: With dead ends: 338 [2018-09-30 23:52:07,362 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 23:52:07,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28162 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=14246, Invalid=62206, Unknown=0, NotChecked=0, Total=76452 [2018-09-30 23:52:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 23:52:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 23:52:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:52:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-09-30 23:52:07,436 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2018-09-30 23:52:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:07,437 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-09-30 23:52:07,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-09-30 23:52:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-09-30 23:52:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:52:07,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:07,438 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 54, 1, 1, 1, 1] [2018-09-30 23:52:07,438 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:07,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2083318915, now seen corresponding path program 108 times [2018-09-30 23:52:07,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:07,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:07,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:07,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:07,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:08,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:08,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:08,971 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:09,212 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 23:52:09,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:09,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:09,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:09,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2018-09-30 23:52:09,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:52:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:52:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:52:09,341 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 61 states. [2018-09-30 23:52:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:10,946 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2018-09-30 23:52:10,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:52:10,946 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 224 [2018-09-30 23:52:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:10,947 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:52:10,947 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:52:10,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5077, Invalid=8495, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:52:10,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:52:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2018-09-30 23:52:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:52:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-09-30 23:52:11,016 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2018-09-30 23:52:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:11,017 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-09-30 23:52:11,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:52:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-09-30 23:52:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:52:11,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:11,017 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-09-30 23:52:11,018 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:11,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 109 times [2018-09-30 23:52:11,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:11,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:11,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:11,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:11,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:15,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:15,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:15,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:15,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:24,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:24,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 225 [2018-09-30 23:52:24,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-09-30 23:52:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-09-30 23:52:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9801, Invalid=41049, Unknown=0, NotChecked=0, Total=50850 [2018-09-30 23:52:24,374 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 226 states. [2018-09-30 23:52:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:34,328 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2018-09-30 23:52:34,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:52:34,328 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 226 [2018-09-30 23:52:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:34,329 INFO L225 Difference]: With dead ends: 344 [2018-09-30 23:52:34,329 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:52:34,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29206 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=14757, Invalid=64485, Unknown=0, NotChecked=0, Total=79242 [2018-09-30 23:52:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:52:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:52:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:52:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-09-30 23:52:34,399 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2018-09-30 23:52:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:34,400 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-09-30 23:52:34,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-09-30 23:52:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-09-30 23:52:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:52:34,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:34,400 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 1, 1, 1, 1] [2018-09-30 23:52:34,401 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:34,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1134508273, now seen corresponding path program 110 times [2018-09-30 23:52:34,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:34,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:34,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:34,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:35,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:35,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:35,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:36,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:36,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:36,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:36,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:36,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2018-09-30 23:52:36,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:52:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:52:36,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:52:36,215 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 62 states. [2018-09-30 23:52:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:38,161 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2018-09-30 23:52:38,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:52:38,162 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 228 [2018-09-30 23:52:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:38,162 INFO L225 Difference]: With dead ends: 237 [2018-09-30 23:52:38,162 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:52:38,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:52:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:52:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2018-09-30 23:52:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:52:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-09-30 23:52:38,235 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2018-09-30 23:52:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:38,235 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-09-30 23:52:38,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:52:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-09-30 23:52:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:52:38,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:38,236 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-09-30 23:52:38,236 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:38,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 111 times [2018-09-30 23:52:38,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:38,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:38,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:38,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3192 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:42,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:42,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:42,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 23:52:42,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:42,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3192 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:51,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:51,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 229 [2018-09-30 23:52:51,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-09-30 23:52:51,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-09-30 23:52:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10147, Invalid=42523, Unknown=0, NotChecked=0, Total=52670 [2018-09-30 23:52:51,629 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 230 states. [2018-09-30 23:53:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:00,332 INFO L93 Difference]: Finished difference Result 350 states and 352 transitions. [2018-09-30 23:53:00,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:53:00,332 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 230 [2018-09-30 23:53:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:00,332 INFO L225 Difference]: With dead ends: 350 [2018-09-30 23:53:00,333 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 23:53:00,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30269 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=15277, Invalid=66805, Unknown=0, NotChecked=0, Total=82082 [2018-09-30 23:53:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 23:53:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 23:53:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 23:53:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-09-30 23:53:00,411 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 230 [2018-09-30 23:53:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:00,411 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-09-30 23:53:00,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-09-30 23:53:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-09-30 23:53:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:53:00,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:00,412 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 56, 1, 1, 1, 1] [2018-09-30 23:53:00,412 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:00,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:00,412 INFO L82 PathProgramCache]: Analyzing trace with hash 291972197, now seen corresponding path program 112 times [2018-09-30 23:53:00,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:00,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:00,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:00,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:01,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:01,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:01,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:02,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:02,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:02,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:02,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:02,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2018-09-30 23:53:02,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:53:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:53:02,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:53:02,219 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 63 states. [2018-09-30 23:53:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:04,118 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-09-30 23:53:04,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:53:04,119 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 232 [2018-09-30 23:53:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:04,119 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:53:04,120 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:53:04,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5432, Invalid=9088, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:53:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:53:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-09-30 23:53:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:53:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-09-30 23:53:04,194 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2018-09-30 23:53:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:04,194 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-09-30 23:53:04,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:53:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-09-30 23:53:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:53:04,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:04,195 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-09-30 23:53:04,195 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:04,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 113 times [2018-09-30 23:53:04,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:04,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:04,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:04,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:04,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:08,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:08,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:08,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:09,168 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:53:09,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:09,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:18,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:18,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 233 [2018-09-30 23:53:18,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-09-30 23:53:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-09-30 23:53:18,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10499, Invalid=44023, Unknown=0, NotChecked=0, Total=54522 [2018-09-30 23:53:18,247 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 234 states. [2018-09-30 23:53:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:26,331 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2018-09-30 23:53:26,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:53:26,331 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 234 [2018-09-30 23:53:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:26,332 INFO L225 Difference]: With dead ends: 356 [2018-09-30 23:53:26,332 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 23:53:26,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31351 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=15806, Invalid=69166, Unknown=0, NotChecked=0, Total=84972 [2018-09-30 23:53:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 23:53:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 23:53:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 23:53:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-09-30 23:53:26,408 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2018-09-30 23:53:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:26,409 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-09-30 23:53:26,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-09-30 23:53:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-09-30 23:53:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:53:26,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:26,410 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 1, 1, 1, 1] [2018-09-30 23:53:26,410 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:26,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash 527422937, now seen corresponding path program 114 times [2018-09-30 23:53:26,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:26,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:26,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:26,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:26,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:27,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:27,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:27,962 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:28,222 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2018-09-30 23:53:28,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:28,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:28,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:28,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2018-09-30 23:53:28,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:53:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:53:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:28,395 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 64 states. [2018-09-30 23:53:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:30,328 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2018-09-30 23:53:30,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:53:30,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 236 [2018-09-30 23:53:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:30,329 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:53:30,329 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:53:30,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5614, Invalid=9392, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:53:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:53:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-09-30 23:53:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:53:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-09-30 23:53:30,408 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2018-09-30 23:53:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:30,409 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-09-30 23:53:30,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:53:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-09-30 23:53:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:53:30,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:30,410 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-09-30 23:53:30,410 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:30,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 115 times [2018-09-30 23:53:30,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:30,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:30,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3422 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:35,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:35,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:35,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:35,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3422 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:44,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:44,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 237 [2018-09-30 23:53:44,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-09-30 23:53:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-09-30 23:53:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10857, Invalid=45549, Unknown=0, NotChecked=0, Total=56406 [2018-09-30 23:53:44,968 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 238 states. [2018-09-30 23:53:53,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:53,144 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2018-09-30 23:53:53,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:53:53,145 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 238 [2018-09-30 23:53:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:53,145 INFO L225 Difference]: With dead ends: 362 [2018-09-30 23:53:53,145 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:53:53,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32452 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=16344, Invalid=71568, Unknown=0, NotChecked=0, Total=87912 [2018-09-30 23:53:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:53:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:53:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:53:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-09-30 23:53:53,255 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 238 [2018-09-30 23:53:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:53,255 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-09-30 23:53:53,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-09-30 23:53:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-09-30 23:53:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:53:53,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:53,256 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 58, 1, 1, 1, 1] [2018-09-30 23:53:53,256 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:53,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -276935347, now seen corresponding path program 116 times [2018-09-30 23:53:53,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:53,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:53,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:53,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:53,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3540 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:55,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:55,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:55,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:55,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:55,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:55,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3540 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:55,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:55,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2018-09-30 23:53:55,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:53:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:53:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=2202, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:55,471 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 65 states. [2018-09-30 23:53:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:57,276 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2018-09-30 23:53:57,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:53:57,276 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 240 [2018-09-30 23:53:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:57,278 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:53:57,278 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:53:57,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5799, Invalid=9701, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:53:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:53:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2018-09-30 23:53:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:53:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-09-30 23:53:57,356 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2018-09-30 23:53:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:57,356 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-09-30 23:53:57,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:53:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-09-30 23:53:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:53:57,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:57,357 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-09-30 23:53:57,357 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:57,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 117 times [2018-09-30 23:53:57,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:57,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:57,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:57,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:57,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:02,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:02,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:02,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:02,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:54:02,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:02,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:12,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:12,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 241 [2018-09-30 23:54:12,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 242 states [2018-09-30 23:54:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2018-09-30 23:54:12,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11221, Invalid=47101, Unknown=0, NotChecked=0, Total=58322 [2018-09-30 23:54:12,277 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 242 states. [2018-09-30 23:54:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:21,512 INFO L93 Difference]: Finished difference Result 368 states and 370 transitions. [2018-09-30 23:54:21,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:54:21,513 INFO L78 Accepts]: Start accepts. Automaton has 242 states. Word has length 242 [2018-09-30 23:54:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:21,513 INFO L225 Difference]: With dead ends: 368 [2018-09-30 23:54:21,513 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:54:21,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33572 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=16891, Invalid=74011, Unknown=0, NotChecked=0, Total=90902 [2018-09-30 23:54:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:54:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:54:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:54:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2018-09-30 23:54:21,594 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2018-09-30 23:54:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:21,595 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2018-09-30 23:54:21,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 242 states. [2018-09-30 23:54:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2018-09-30 23:54:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 23:54:21,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:21,595 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 1, 1, 1, 1] [2018-09-30 23:54:21,596 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:21,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash 316115649, now seen corresponding path program 118 times [2018-09-30 23:54:21,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:21,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:21,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:21,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:21,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:23,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:23,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:23,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:23,430 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:23,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:23,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:23,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:23,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2018-09-30 23:54:23,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:54:23,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:54:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:54:23,565 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand 66 states. [2018-09-30 23:54:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:25,617 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-09-30 23:54:25,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:54:25,617 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 244 [2018-09-30 23:54:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:25,618 INFO L225 Difference]: With dead ends: 253 [2018-09-30 23:54:25,618 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:54:25,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5987, Invalid=10015, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:54:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:54:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2018-09-30 23:54:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:54:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-09-30 23:54:25,701 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2018-09-30 23:54:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:25,701 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-09-30 23:54:25,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:54:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-09-30 23:54:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:54:25,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:25,702 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-09-30 23:54:25,702 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:25,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:25,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 119 times [2018-09-30 23:54:25,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:25,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:25,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:25,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:25,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3660 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:30,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:30,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:30,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:31,040 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:54:31,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:31,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3660 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:41,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:41,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 245 [2018-09-30 23:54:41,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 246 states [2018-09-30 23:54:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2018-09-30 23:54:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11591, Invalid=48679, Unknown=0, NotChecked=0, Total=60270 [2018-09-30 23:54:41,178 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 246 states. [2018-09-30 23:54:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:52,111 INFO L93 Difference]: Finished difference Result 374 states and 376 transitions. [2018-09-30 23:54:52,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:54:52,111 INFO L78 Accepts]: Start accepts. Automaton has 246 states. Word has length 246 [2018-09-30 23:54:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:52,111 INFO L225 Difference]: With dead ends: 374 [2018-09-30 23:54:52,111 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 23:54:52,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34711 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=17447, Invalid=76495, Unknown=0, NotChecked=0, Total=93942 [2018-09-30 23:54:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 23:54:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 23:54:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 23:54:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2018-09-30 23:54:52,222 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2018-09-30 23:54:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:52,222 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2018-09-30 23:54:52,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 246 states. [2018-09-30 23:54:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2018-09-30 23:54:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:54:52,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:52,223 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 60, 1, 1, 1, 1] [2018-09-30 23:54:52,223 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:52,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -364868043, now seen corresponding path program 120 times [2018-09-30 23:54:52,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:52,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:52,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:52,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:52,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:53,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:53,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:53,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:54,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 23:54:54,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:54,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:54,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:54,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 66 [2018-09-30 23:54:54,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:54:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:54:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:54:54,375 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 67 states. [2018-09-30 23:54:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:56,597 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2018-09-30 23:54:56,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:54:56,598 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 248 [2018-09-30 23:54:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:56,599 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:54:56,599 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:54:56,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6178, Invalid=10334, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:54:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:54:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2018-09-30 23:54:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:54:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-09-30 23:54:56,689 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2018-09-30 23:54:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:56,690 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-09-30 23:54:56,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:54:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-09-30 23:54:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:54:56,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:56,691 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-09-30 23:54:56,691 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:56,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:56,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 121 times [2018-09-30 23:54:56,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:56,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:56,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:56,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:56,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:01,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:01,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:01,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:02,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:12,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:12,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 249 [2018-09-30 23:55:12,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 250 states [2018-09-30 23:55:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2018-09-30 23:55:12,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11967, Invalid=50283, Unknown=0, NotChecked=0, Total=62250 [2018-09-30 23:55:12,470 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 250 states. [2018-09-30 23:55:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:19,304 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2018-09-30 23:55:19,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:55:19,304 INFO L78 Accepts]: Start accepts. Automaton has 250 states. Word has length 250 [2018-09-30 23:55:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:19,304 INFO L225 Difference]: With dead ends: 380 [2018-09-30 23:55:19,304 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:55:19,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35869 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=18012, Invalid=79020, Unknown=0, NotChecked=0, Total=97032 [2018-09-30 23:55:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:55:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:55:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:55:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2018-09-30 23:55:19,382 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2018-09-30 23:55:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:19,382 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2018-09-30 23:55:19,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 250 states. [2018-09-30 23:55:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2018-09-30 23:55:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:55:19,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:19,383 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 1, 1, 1, 1] [2018-09-30 23:55:19,383 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:19,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1711167401, now seen corresponding path program 122 times [2018-09-30 23:55:19,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:19,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:19,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:19,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:19,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:21,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:21,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:21,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:21,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:21,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:21,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:21,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:21,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2018-09-30 23:55:21,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:55:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:55:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:55:21,463 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 68 states. [2018-09-30 23:55:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:23,347 INFO L93 Difference]: Finished difference Result 261 states and 262 transitions. [2018-09-30 23:55:23,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:55:23,347 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 252 [2018-09-30 23:55:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:23,348 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:55:23,348 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:55:23,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6372, Invalid=10658, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:55:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:55:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-09-30 23:55:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:55:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-09-30 23:55:23,434 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2018-09-30 23:55:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:23,434 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-09-30 23:55:23,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:55:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-09-30 23:55:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:55:23,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:23,435 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-09-30 23:55:23,436 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:23,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 123 times [2018-09-30 23:55:23,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:23,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:23,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:23,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:23,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3906 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:28,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:28,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:28,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:29,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 23:55:29,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:29,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3906 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:39,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:39,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 253 [2018-09-30 23:55:39,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 254 states [2018-09-30 23:55:39,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2018-09-30 23:55:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12349, Invalid=51913, Unknown=0, NotChecked=0, Total=64262 [2018-09-30 23:55:39,919 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 254 states. [2018-09-30 23:55:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:51,174 INFO L93 Difference]: Finished difference Result 386 states and 388 transitions. [2018-09-30 23:55:51,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:55:51,174 INFO L78 Accepts]: Start accepts. Automaton has 254 states. Word has length 254 [2018-09-30 23:55:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:51,175 INFO L225 Difference]: With dead ends: 386 [2018-09-30 23:55:51,175 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 23:55:51,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37046 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=18586, Invalid=81586, Unknown=0, NotChecked=0, Total=100172 [2018-09-30 23:55:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 23:55:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 23:55:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:55:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-09-30 23:55:51,266 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 254 [2018-09-30 23:55:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:51,266 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-09-30 23:55:51,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 254 states. [2018-09-30 23:55:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-09-30 23:55:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 23:55:51,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:51,268 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 62, 1, 1, 1, 1] [2018-09-30 23:55:51,268 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:51,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash -975837411, now seen corresponding path program 124 times [2018-09-30 23:55:51,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:51,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:51,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:51,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:51,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4032 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:53,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:53,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:53,335 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:53,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:53,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:53,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4032 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:53,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:53,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2018-09-30 23:55:53,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:55:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:55:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=2476, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:55:53,648 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 69 states. [2018-09-30 23:55:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:55,636 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-09-30 23:55:55,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:55:55,637 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 256 [2018-09-30 23:55:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:55,638 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:55:55,638 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:55:55,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6569, Invalid=10987, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:55:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:55:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-09-30 23:55:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:55:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-09-30 23:55:55,728 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2018-09-30 23:55:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:55,728 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-09-30 23:55:55,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:55:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-09-30 23:55:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:55:55,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:55,729 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-09-30 23:55:55,730 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:55,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 125 times [2018-09-30 23:55:55,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:55,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:55,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:55,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:55,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:01,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:01,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:01,446 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:01,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 23:56:01,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:01,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:13,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:13,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 257 [2018-09-30 23:56:13,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 258 states [2018-09-30 23:56:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 258 interpolants. [2018-09-30 23:56:13,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12737, Invalid=53569, Unknown=0, NotChecked=0, Total=66306 [2018-09-30 23:56:13,161 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 258 states. [2018-09-30 23:56:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:22,346 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2018-09-30 23:56:22,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:56:22,346 INFO L78 Accepts]: Start accepts. Automaton has 258 states. Word has length 258 [2018-09-30 23:56:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:22,346 INFO L225 Difference]: With dead ends: 392 [2018-09-30 23:56:22,346 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:56:22,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38242 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=19169, Invalid=84193, Unknown=0, NotChecked=0, Total=103362 [2018-09-30 23:56:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:56:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:56:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:56:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-09-30 23:56:22,438 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2018-09-30 23:56:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:22,438 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-09-30 23:56:22,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 258 states. [2018-09-30 23:56:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-09-30 23:56:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:56:22,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:22,439 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 1, 1, 1, 1] [2018-09-30 23:56:22,440 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:22,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1493974161, now seen corresponding path program 126 times [2018-09-30 23:56:22,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:22,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:22,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:22,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:22,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:24,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:24,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:24,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:25,019 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 65 check-sat command(s) [2018-09-30 23:56:25,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:25,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:25,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:25,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-09-30 23:56:25,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:56:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:56:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=2617, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:56:25,251 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 71 states. [2018-09-30 23:56:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:27,267 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2018-09-30 23:56:27,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:56:27,267 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 260 [2018-09-30 23:56:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:27,268 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:56:27,269 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:56:27,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6769, Invalid=11321, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:56:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:56:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 263. [2018-09-30 23:56:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:56:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-09-30 23:56:27,398 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 260 [2018-09-30 23:56:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:27,399 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-09-30 23:56:27,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:56:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-09-30 23:56:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:56:27,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:27,402 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-09-30 23:56:27,402 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:27,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:27,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 127 times [2018-09-30 23:56:27,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:27,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:27,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:27,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:27,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4160 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:33,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:33,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:33,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:33,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-30 23:56:37,087 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 23:56:37,288 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:37,288 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:56:37,295 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:56:37,295 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:56:37 BoogieIcfgContainer [2018-09-30 23:56:37,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:56:37,299 INFO L168 Benchmark]: Toolchain (without parser) took 770811.40 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 132.6 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 268.6 MB). Peak memory consumption was 401.2 MB. Max. memory is 7.1 GB. [2018-09-30 23:56:37,300 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-30 23:56:37,300 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.06 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. [2018-09-30 23:56:37,301 INFO L168 Benchmark]: Boogie Preprocessor took 25.09 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. [2018-09-30 23:56:37,301 INFO L168 Benchmark]: RCFGBuilder took 259.11 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. [2018-09-30 23:56:37,301 INFO L168 Benchmark]: TraceAbstraction took 770480.07 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 132.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 247.4 MB). Peak memory consumption was 380.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:56:37,303 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.06 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 25.09 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 259.11 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 770480.07 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 132.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 247.4 MB). Peak memory consumption was 380.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was analyzing trace of length 263 with TraceHistMax 65, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 190 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 770.4s OverallTime, 129 OverallIterations, 65 TraceHistogramMax, 291.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2658 SDtfs, 1500 SDslu, 15607 SDs, 0 SdLazy, 205808 SolverSat, 9449 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 112.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29682 GetRequests, 14806 SyntacticMatches, 0 SemanticMatches, 14876 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923772 ImplicationChecksByTransitivity, 551.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=263occurred in iteration=128, 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: 4.5s AutomataMinimizationTime, 128 MinimizatonAttempts, 256 StatesRemovedByMinimization, 64 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.4s SsaConstructionTime, 15.1s SatisfiabilityAnalysisTime, 438.9s InterpolantComputationTime, 34034 NumberOfCodeBlocks, 34034 NumberOfCodeBlocksAsserted, 2375 NumberOfCheckSat, 33780 ConstructedInterpolants, 0 QuantifiedInterpolants, 29677446 SizeOfPredicates, 506 NumberOfNonLiveVariables, 68544 ConjunctsInSsa, 8951 ConjunctsInUnsatCore, 254 InterpolantComputations, 2 PerfectInterpolantSequences, 357758/707198 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-56-37-310.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-56-37-310.csv Completed graceful shutdown