java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:31:05,781 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:31:05,783 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:31:05,800 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:31:05,800 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:31:05,801 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:31:05,803 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:31:05,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:31:05,807 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:31:05,808 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:31:05,809 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:31:05,833 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:31:05,849 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:31:05,850 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:31:05,850 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:31:05,851 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:31:05,851 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:31:05,851 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:31:05,851 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:31:05,852 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:31:05,852 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:31:05,852 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:31:05,852 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:31:05,853 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:31:05,853 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:31:05,854 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:31:05,854 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:31:05,854 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:31:05,854 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:31:05,854 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:31:05,855 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:31:05,855 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:31:05,855 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:31:05,855 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:31:05,856 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:31:05,857 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:31:05,857 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:31:05,857 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:31:05,857 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:31:05,858 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:31:05,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:31:05,858 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:31:05,858 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:31:05,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:31:05,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:31:05,940 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:31:05,941 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:31:05,942 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:31:05,943 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl [2018-09-28 10:31:05,943 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl' [2018-09-28 10:31:05,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:31:06,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:31:06,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:31:06,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:31:06,001 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:31:06,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:31:06,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:31:06,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:31:06,045 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:31:06,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/1) ... [2018-09-28 10:31:06,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:31:06,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:31:06,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:31:06,069 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:31:06,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (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 [2018-09-28 10:31:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:31:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:31:06,354 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:31:06,354 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:31:06 BoogieIcfgContainer [2018-09-28 10:31:06,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:31:06,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:31:06,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:31:06,359 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:31:06,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:31:05" (1/2) ... [2018-09-28 10:31:06,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d97719 and model type count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:31:06, skipping insertion in model container [2018-09-28 10:31:06,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:31:06" (2/2) ... [2018-09-28 10:31:06,362 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bpl [2018-09-28 10:31:06,371 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:31:06,379 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:31:06,428 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:31:06,429 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:31:06,429 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:31:06,429 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:31:06,429 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:31:06,429 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:31:06,429 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:31:06,430 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:31:06,430 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:31:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-28 10:31:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:31:06,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:06,451 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:31:06,452 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:06,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-28 10:31:06,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:06,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:06,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:06,619 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:31:06,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:31:06,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:31:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:31:06,637 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:06,640 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-28 10:31:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:06,778 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-28 10:31:06,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:31:06,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-28 10:31:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:06,793 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:31:06,793 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:31:06,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:31:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:31:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:31:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:31:06,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-28 10:31:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:06,847 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:31:06,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:31:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:31:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:31:06,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:06,848 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-28 10:31:06,848 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:06,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-28 10:31:06,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:06,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:06,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:06,945 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 [2018-09-28 10:31:06,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:06,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:07,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:31:07,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:31:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:31:07,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:07,065 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-28 10:31:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:07,148 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:31:07,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:31:07,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-28 10:31:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:07,150 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:31:07,150 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:31:07,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:31:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:31:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:31:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:31:07,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-28 10:31:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:07,155 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:31:07,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:31:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:31:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:31:07,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:07,156 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-28 10:31:07,157 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:07,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-28 10:31:07,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:07,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:07,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:07,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:07,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:07,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:07,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:07,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:07,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:07,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:07,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:31:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:31:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:31:07,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:07,381 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-28 10:31:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:07,638 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:31:07,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:31:07,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:31:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:07,639 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:31:07,639 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:31:07,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:31:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:31:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:31:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:31:07,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-28 10:31:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:07,646 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:31:07,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:31:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:31:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:31:07,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:07,647 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-28 10:31:07,648 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:07,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-28 10:31:07,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:07,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:07,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:07,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:07,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:07,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:31:07,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:07,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:31:07,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:07,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:07,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:31:07,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:31:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:31:07,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:07,937 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-28 10:31:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:08,026 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:31:08,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:31:08,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-28 10:31:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:08,028 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:31:08,028 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:31:08,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:31:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:31:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:31:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:31:08,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-28 10:31:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:08,033 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:31:08,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:31:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:31:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:31:08,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:08,034 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-28 10:31:08,035 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:08,035 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-28 10:31:08,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:08,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:08,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:08,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:08,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:08,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:08,231 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 [2018-09-28 10:31:08,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:08,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:08,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:08,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:08,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:08,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:31:08,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:31:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:31:08,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:08,308 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-28 10:31:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:08,413 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:31:08,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:31:08,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-28 10:31:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:08,414 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:31:08,415 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:31:08,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:31:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:31:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:31:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:31:08,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-28 10:31:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:08,420 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:31:08,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:31:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:31:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:31:08,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:08,421 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-28 10:31:08,421 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:08,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-28 10:31:08,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:08,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:08,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:08,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:08,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:08,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:08,562 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 [2018-09-28 10:31:08,575 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:08,596 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:31:08,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:08,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:09,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:09,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:31:09,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:31:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:31:09,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:09,059 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-28 10:31:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:09,256 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:31:09,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:31:09,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-28 10:31:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:09,260 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:31:09,260 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:31:09,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:31:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:31:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:31:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:31:09,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-28 10:31:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:09,265 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:31:09,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:31:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:31:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:31:09,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:09,266 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-28 10:31:09,267 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:09,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-28 10:31:09,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:09,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:09,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:09,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:09,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:09,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:09,401 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 [2018-09-28 10:31:09,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:09,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:31:09,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:09,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:09,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:09,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:31:09,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:31:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:31:09,551 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:09,551 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-28 10:31:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:09,744 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:31:09,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:31:09,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-28 10:31:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:09,747 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:31:09,747 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:31:09,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:31:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:31:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:31:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:31:09,752 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-28 10:31:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:09,752 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:31:09,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:31:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:31:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:31:09,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:09,753 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-28 10:31:09,754 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:09,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-28 10:31:09,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:09,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:09,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:09,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:09,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:09,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:09,896 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 [2018-09-28 10:31:09,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:09,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:10,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:10,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:31:10,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:31:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:31:10,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:10,067 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-28 10:31:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:10,152 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:31:10,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:31:10,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-28 10:31:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:10,156 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:31:10,156 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:31:10,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:31:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:31:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:31:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:31:10,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-28 10:31:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:10,161 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:31:10,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:31:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:31:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:31:10,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:10,163 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-28 10:31:10,163 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:10,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-28 10:31:10,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:10,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:10,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:10,297 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 [2018-09-28 10:31:10,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:10,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:10,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:10,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:10,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:10,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:31:10,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:31:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:31:10,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:10,425 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-28 10:31:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:10,588 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:31:10,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:31:10,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-28 10:31:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:10,591 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:31:10,591 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:31:10,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:31:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:31:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:31:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:31:10,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-28 10:31:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:10,597 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:31:10,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:31:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:31:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:31:10,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:10,598 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-28 10:31:10,598 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:10,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-28 10:31:10,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:10,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:10,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:10,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:10,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:10,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:10,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:10,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:31:10,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:10,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:10,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:10,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:31:10,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:31:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:31:10,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:10,862 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-28 10:31:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:10,944 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:31:10,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:31:10,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-28 10:31:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:10,946 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:31:10,946 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:31:10,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:31:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:31:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:31:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:31:10,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-28 10:31:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:10,951 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:31:10,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:31:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:31:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:31:10,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:10,953 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-28 10:31:10,953 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:10,953 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:10,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-28 10:31:10,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:10,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:10,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:10,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:11,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:11,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:11,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:11,129 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:11,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:11,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:11,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:11,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:31:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:31:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:31:11,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:11,238 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-28 10:31:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:11,330 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:31:11,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:31:11,330 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-28 10:31:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:11,331 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:31:11,331 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:31:11,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:31:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:31:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:31:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:31:11,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-28 10:31:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:11,338 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:31:11,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:31:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:31:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:31:11,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:11,340 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-28 10:31:11,340 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:11,340 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-28 10:31:11,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:11,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:11,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:11,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:11,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:11,737 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 [2018-09-28 10:31:11,745 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:11,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:31:11,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:11,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:11,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:11,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:31:11,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:31:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:31:11,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:11,876 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-28 10:31:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:12,147 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:31:12,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:31:12,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-28 10:31:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:12,149 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:31:12,149 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:31:12,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:31:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:31:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:31:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:31:12,155 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-28 10:31:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:12,155 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:31:12,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:31:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:31:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:31:12,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:12,156 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-28 10:31:12,156 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:12,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-28 10:31:12,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:12,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:12,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:12,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:12,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:12,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:12,307 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 [2018-09-28 10:31:12,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:12,348 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:31:12,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:12,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:12,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:12,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:31:12,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:31:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:31:12,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:12,498 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-28 10:31:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:12,635 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:31:12,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:31:12,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-28 10:31:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:12,636 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:31:12,637 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:31:12,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:31:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:31:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:31:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:31:12,641 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-28 10:31:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:12,642 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:31:12,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:31:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:31:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:31:12,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:12,643 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-28 10:31:12,643 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:12,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-28 10:31:12,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:12,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:12,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:12,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:12,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:12,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:12,848 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 [2018-09-28 10:31:12,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:12,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:13,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:13,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:31:13,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:31:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:31:13,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:13,120 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-28 10:31:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:13,340 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:31:13,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:31:13,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-28 10:31:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:13,343 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:31:13,343 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:31:13,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:31:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:31:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:31:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:31:13,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-28 10:31:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:13,349 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:31:13,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:31:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:31:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:31:13,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:13,350 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-28 10:31:13,351 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:13,351 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-28 10:31:13,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:13,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:13,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:13,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:13,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:13,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:13,530 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 [2018-09-28 10:31:13,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:13,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:13,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:13,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:13,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:13,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:31:13,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:31:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:31:13,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:13,909 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-28 10:31:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:14,206 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:31:14,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:31:14,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-28 10:31:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:14,207 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:31:14,207 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:31:14,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:31:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:31:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:31:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:31:14,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-28 10:31:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:14,213 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:31:14,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:31:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:31:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:31:14,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:14,214 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-28 10:31:14,215 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:14,215 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-28 10:31:14,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:14,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:14,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:14,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:14,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:14,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:14,372 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 [2018-09-28 10:31:14,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:14,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:31:14,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:14,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:14,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:14,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:31:14,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:31:14,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:31:14,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:14,527 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-28 10:31:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:14,672 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:31:14,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:31:14,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-28 10:31:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:14,676 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:31:14,676 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:31:14,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:31:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:31:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:31:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:31:14,681 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-28 10:31:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:14,681 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:31:14,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:31:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:31:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:31:14,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:14,682 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-28 10:31:14,682 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:14,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-28 10:31:14,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:14,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:14,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:14,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:14,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:15,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:15,195 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 [2018-09-28 10:31:15,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:15,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:15,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:15,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:15,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:15,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:31:15,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:31:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:31:15,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:15,671 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-28 10:31:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:15,815 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:31:15,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:31:15,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-28 10:31:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:15,816 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:31:15,817 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:31:15,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:31:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:31:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:31:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:31:15,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-28 10:31:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:15,822 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:31:15,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:31:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:31:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:31:15,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:15,823 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-28 10:31:15,824 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:15,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-28 10:31:15,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:15,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:15,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:15,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:15,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:16,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:16,807 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 [2018-09-28 10:31:16,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:16,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:31:16,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:16,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:16,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:16,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:31:16,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:31:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:31:16,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:16,944 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-28 10:31:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:17,075 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:31:17,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:31:17,076 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-28 10:31:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:17,076 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:31:17,076 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:31:17,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:31:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:31:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:31:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:31:17,082 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-28 10:31:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:17,083 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:31:17,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:31:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:31:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:31:17,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:17,084 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-28 10:31:17,084 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:17,084 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-28 10:31:17,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:17,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:17,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:17,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:17,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:17,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:17,365 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 [2018-09-28 10:31:17,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:17,410 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:31:17,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:17,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:18,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:18,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:31:18,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:31:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:31:18,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:18,029 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-28 10:31:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:18,187 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:31:18,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:31:18,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-28 10:31:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:18,188 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:31:18,189 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:31:18,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:31:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:31:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:31:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:31:18,193 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-28 10:31:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:18,193 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:31:18,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:31:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:31:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:31:18,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:18,194 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-28 10:31:18,194 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:18,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-28 10:31:18,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:18,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:18,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:18,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:19,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:19,042 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 [2018-09-28 10:31:19,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:19,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:19,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:19,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:31:19,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:31:19,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:31:19,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:19,315 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-28 10:31:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:19,514 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:31:19,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:31:19,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-28 10:31:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:19,515 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:31:19,515 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:31:19,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:31:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:31:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:31:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:31:19,521 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-28 10:31:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:19,522 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:31:19,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:31:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:31:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:31:19,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:19,523 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-28 10:31:19,523 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:19,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-28 10:31:19,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:19,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:19,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:19,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:19,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:19,757 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 [2018-09-28 10:31:19,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:19,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:19,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:19,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:19,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:19,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:31:19,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:31:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:31:19,947 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:19,948 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-28 10:31:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:20,152 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:31:20,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:31:20,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-28 10:31:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:20,153 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:31:20,153 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:31:20,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:31:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:31:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:31:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:31:20,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-28 10:31:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:20,159 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:31:20,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:31:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:31:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:31:20,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:20,161 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-28 10:31:20,161 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:20,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-28 10:31:20,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:20,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:20,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:20,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:20,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:20,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:20,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-28 10:31:20,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:20,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:20,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:20,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:31:20,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:31:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:31:20,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:20,701 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-28 10:31:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:20,893 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:31:20,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:31:20,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-28 10:31:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:20,896 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:31:20,896 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:31:20,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:31:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:31:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:31:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:31:20,901 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-28 10:31:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:20,902 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:31:20,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:31:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:31:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:31:20,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:20,903 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-28 10:31:20,903 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:20,903 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-28 10:31:20,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:20,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:20,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:20,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:20,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:21,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:21,354 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 [2018-09-28 10:31:21,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:21,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:21,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:21,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:21,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:21,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:31:21,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:31:21,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:31:21,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:21,792 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-28 10:31:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:22,185 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:31:22,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:31:22,185 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-28 10:31:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:22,186 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:31:22,186 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:31:22,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:31:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:31:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:31:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:31:22,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-28 10:31:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:22,192 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:31:22,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:31:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:31:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:31:22,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:22,193 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-28 10:31:22,193 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:22,193 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-28 10:31:22,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:22,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:22,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:22,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:22,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:22,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:22,613 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 [2018-09-28 10:31:22,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:22,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-28 10:31:22,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:22,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:22,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:22,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:31:22,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:31:22,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:31:22,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:22,967 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-28 10:31:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:23,438 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:31:23,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:31:23,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-28 10:31:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:23,440 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:31:23,440 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:31:23,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:31:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:31:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:31:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:31:23,445 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-28 10:31:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:23,445 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:31:23,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:31:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:31:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:31:23,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:23,446 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-28 10:31:23,446 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:23,446 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-28 10:31:23,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:23,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:23,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:23,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:23,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:23,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:23,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:23,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:23,953 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:31:23,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:23,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:24,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:24,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:31:24,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:31:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:31:24,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:24,101 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-28 10:31:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:24,245 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:31:24,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:31:24,245 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-28 10:31:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:24,246 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:31:24,247 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:31:24,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:31:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:31:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:31:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:31:24,251 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-28 10:31:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:24,251 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:31:24,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:31:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:31:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:31:24,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:24,253 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-28 10:31:24,253 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:24,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-28 10:31:24,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:24,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:24,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:24,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:24,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:24,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:24,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:24,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:24,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:24,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:24,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:31:24,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:31:24,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:31:24,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:24,653 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-28 10:31:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:24,839 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:31:24,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:31:24,839 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-28 10:31:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:24,840 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:31:24,840 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:31:24,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:31:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:31:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:31:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:31:24,844 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-28 10:31:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:24,844 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:31:24,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:31:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:31:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:31:24,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:24,845 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-28 10:31:24,845 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:24,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:24,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-28 10:31:24,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:24,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:24,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:24,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:24,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:25,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:25,342 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 [2018-09-28 10:31:25,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:25,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:25,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:25,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:25,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:25,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:31:25,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:31:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:31:25,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:25,608 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-28 10:31:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:25,791 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:31:25,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:31:25,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-28 10:31:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:25,792 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:31:25,792 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:31:25,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:31:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:31:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:31:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:31:25,795 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-28 10:31:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:25,796 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:31:25,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:31:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:31:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:31:25,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:25,797 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-28 10:31:25,797 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:25,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-28 10:31:25,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:25,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:25,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:26,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:26,060 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 [2018-09-28 10:31:26,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:26,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-28 10:31:26,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:26,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:26,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:26,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:31:26,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:31:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:31:26,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:26,274 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-28 10:31:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:26,478 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:31:26,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:31:26,479 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-28 10:31:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:26,480 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:31:26,480 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:31:26,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:31:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:31:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:31:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:31:26,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-28 10:31:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:26,484 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:31:26,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:31:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:31:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:31:26,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:26,485 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-28 10:31:26,485 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:26,486 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-28 10:31:26,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:26,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:26,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:26,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:26,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:26,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:26,718 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 [2018-09-28 10:31:26,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:26,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:26,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:26,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:26,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:26,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:31:26,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:31:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:31:26,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:26,974 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-28 10:31:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:27,270 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:31:27,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:31:27,270 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-28 10:31:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:27,271 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:31:27,272 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:31:27,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:31:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:31:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:31:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:31:27,278 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-28 10:31:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:27,279 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:31:27,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:31:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:31:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:31:27,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:27,279 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-28 10:31:27,280 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:27,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-28 10:31:27,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:27,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:27,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:27,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:27,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:27,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:27,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:27,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:27,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-28 10:31:27,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:27,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:27,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:27,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:31:27,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:31:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:31:27,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:27,845 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-28 10:31:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:27,998 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:31:27,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:31:27,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-28 10:31:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:27,999 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:31:27,999 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:31:28,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:31:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:31:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:31:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:31:28,003 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-28 10:31:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:28,003 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:31:28,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:31:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:31:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:31:28,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:28,003 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-28 10:31:28,004 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:28,004 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-28 10:31:28,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:28,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:28,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:28,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:28,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:28,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:28,887 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 [2018-09-28 10:31:28,896 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:28,957 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:31:28,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:28,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:29,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:29,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:31:29,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:31:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:31:29,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:29,094 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-28 10:31:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:29,225 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:31:29,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:31:29,226 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-28 10:31:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:29,226 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:31:29,226 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:31:29,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:31:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:31:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:31:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:31:29,229 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-28 10:31:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:29,229 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:31:29,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:31:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:31:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:31:29,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:29,230 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-28 10:31:29,230 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:29,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-28 10:31:29,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:29,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:29,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:29,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:29,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:29,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:29,485 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 [2018-09-28 10:31:29,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:29,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:29,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:29,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:31:29,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:31:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:31:29,818 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:29,819 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-28 10:31:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:30,027 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:31:30,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:31:30,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-28 10:31:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:30,028 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:31:30,028 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:31:30,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:31:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:31:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:31:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:31:30,031 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-28 10:31:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:30,031 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:31:30,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:31:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:31:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:31:30,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:30,032 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-28 10:31:30,032 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:30,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-28 10:31:30,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:30,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:30,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:30,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:30,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:30,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:30,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:30,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:30,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:30,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:30,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:30,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:30,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:31:30,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:31:30,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:31:30,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:30,900 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-28 10:31:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:31,124 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:31:31,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:31:31,125 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-28 10:31:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:31,125 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:31:31,125 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:31:31,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:31:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:31:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:31:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:31:31,129 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-28 10:31:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:31,129 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:31:31,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:31:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:31:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:31:31,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:31,130 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-28 10:31:31,130 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:31,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-28 10:31:31,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:31,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:31,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:31,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:31,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:31,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:31,427 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 [2018-09-28 10:31:31,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:31,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:31:31,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:31,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:31,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:31,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:31:31,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:31:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:31:31,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:31,656 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-28 10:31:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:31,842 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:31:31,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:31:31,843 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-28 10:31:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:31,844 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:31:31,844 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:31:31,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:31:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:31:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:31:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:31:31,847 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-28 10:31:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:31,847 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:31:31,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:31:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:31:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:31:31,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:31,848 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-28 10:31:31,848 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:31,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-28 10:31:31,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:31,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:31,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:31,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:32,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:32,294 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 [2018-09-28 10:31:32,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:32,367 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:32,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:32,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:32,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:32,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:31:32,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:31:32,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:31:32,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:32,572 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-28 10:31:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:32,861 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:31:32,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:31:32,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-28 10:31:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:32,863 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:31:32,863 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:31:32,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:31:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:31:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:31:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:31:32,866 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-28 10:31:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:32,866 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:31:32,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:31:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:31:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:31:32,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:32,867 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-28 10:31:32,868 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:32,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:32,868 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-28 10:31:32,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:32,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:32,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:33,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:33,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:33,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:33,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-28 10:31:33,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:33,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:33,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:33,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:31:33,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:31:33,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:31:33,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:33,954 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-28 10:31:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:34,171 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:31:34,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:31:34,172 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-28 10:31:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:34,172 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:31:34,173 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:31:34,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:31:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:31:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:31:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:31:34,175 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-28 10:31:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:34,175 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:31:34,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:31:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:31:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:31:34,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:34,176 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-28 10:31:34,176 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:34,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-28 10:31:34,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:34,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:34,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:34,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:34,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:34,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:34,502 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 [2018-09-28 10:31:34,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:34,590 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:31:34,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:34,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:34,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:34,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:31:34,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:31:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:31:34,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:34,763 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-28 10:31:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:35,020 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:31:35,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:31:35,021 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-28 10:31:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:35,022 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:31:35,022 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:31:35,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:31:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:31:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:31:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:31:35,025 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-28 10:31:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:35,025 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:31:35,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:31:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:31:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:31:35,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:35,026 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-28 10:31:35,026 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:35,026 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-28 10:31:35,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:35,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:35,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:35,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:35,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:35,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:35,548 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 [2018-09-28 10:31:35,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:35,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:35,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:35,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:31:35,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:31:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:31:35,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:35,876 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-28 10:31:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:36,174 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:31:36,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:31:36,175 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-28 10:31:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:36,176 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:31:36,176 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:31:36,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:31:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:31:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:31:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:31:36,178 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-28 10:31:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:36,178 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:31:36,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:31:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:31:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:31:36,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:36,179 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-28 10:31:36,179 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:36,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-28 10:31:36,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:36,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:36,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:36,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:36,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:36,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:36,478 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 [2018-09-28 10:31:36,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:36,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:36,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:36,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:36,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:36,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:31:36,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:31:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:31:36,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:36,776 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-28 10:31:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:37,047 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:31:37,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:31:37,048 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-28 10:31:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:37,048 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:31:37,048 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:31:37,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:31:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:31:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:31:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:31:37,052 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-28 10:31:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:37,052 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:31:37,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:31:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:31:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:31:37,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:37,053 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-28 10:31:37,053 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:37,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-28 10:31:37,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:37,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:37,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:37,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:37,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:37,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:37,467 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 [2018-09-28 10:31:37,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:37,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-28 10:31:37,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:37,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:37,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:37,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:31:37,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:31:37,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:31:37,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:37,733 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-28 10:31:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:38,029 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:31:38,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:31:38,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-28 10:31:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:38,030 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:31:38,030 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:31:38,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:31:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:31:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:31:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:31:38,032 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-28 10:31:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:38,033 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:31:38,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:31:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:31:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:31:38,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:38,033 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-28 10:31:38,034 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:38,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-28 10:31:38,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:38,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:38,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:38,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:38,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:38,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:38,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:38,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:38,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:38,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:38,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:39,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:39,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:31:39,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:31:39,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:31:39,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:39,077 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-28 10:31:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:39,561 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:31:39,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:31:39,561 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-28 10:31:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:39,562 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:31:39,562 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:31:39,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:31:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:31:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:31:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:31:39,567 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-28 10:31:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:39,567 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:31:39,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:31:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:31:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:31:39,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:39,568 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-28 10:31:39,568 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:39,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-28 10:31:39,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:39,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:39,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:39,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:39,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:39,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:39,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:39,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:40,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-28 10:31:40,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:40,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:40,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:40,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:31:40,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:31:40,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:31:40,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:40,225 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-28 10:31:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:40,518 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:31:40,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:31:40,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-28 10:31:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:40,519 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:31:40,519 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:31:40,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:31:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:31:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:31:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:31:40,523 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-28 10:31:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:40,523 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:31:40,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:31:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:31:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:31:40,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:40,524 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-28 10:31:40,524 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:40,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:40,524 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-28 10:31:40,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:40,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:40,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:40,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:40,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:40,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:40,988 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 [2018-09-28 10:31:40,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:41,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:31:41,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:41,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:41,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:41,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:31:41,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:31:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:31:41,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:41,276 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-28 10:31:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:41,485 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:31:41,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:31:41,485 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-28 10:31:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:41,486 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:31:41,486 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:31:41,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:31:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:31:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:31:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:31:41,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-28 10:31:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:41,489 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:31:41,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:31:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:31:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:31:41,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:41,490 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-28 10:31:41,490 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:41,490 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-28 10:31:41,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:41,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:41,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:41,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:41,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:41,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:41,836 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 [2018-09-28 10:31:41,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:41,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:42,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:42,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:31:42,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:31:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:31:42,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:42,111 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-28 10:31:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:42,424 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:31:42,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:31:42,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-28 10:31:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:42,425 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:31:42,425 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:31:42,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:31:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:31:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:31:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:31:42,428 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-28 10:31:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:42,429 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:31:42,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:31:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:31:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:31:42,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:42,430 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-28 10:31:42,430 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:42,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:42,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-28 10:31:42,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:42,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:42,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:42,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:42,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:44,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:44,555 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 [2018-09-28 10:31:44,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:44,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:44,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:44,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:45,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:45,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:31:45,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:31:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:31:45,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:45,046 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-28 10:31:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:45,480 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:31:45,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:31:45,480 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-28 10:31:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:45,481 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:31:45,481 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:31:45,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:31:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:31:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:31:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:31:45,485 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-28 10:31:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:45,486 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:31:45,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:31:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:31:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:31:45,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:45,487 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-28 10:31:45,487 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:45,487 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-28 10:31:45,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:45,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:45,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:45,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:45,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:46,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:46,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:31:46,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:46,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-28 10:31:46,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:46,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:46,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:46,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:31:46,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:31:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:31:46,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:46,428 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-28 10:31:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:46,706 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:31:46,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:31:46,706 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-28 10:31:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:46,707 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:31:46,707 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:31:46,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:31:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:31:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:31:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:31:46,709 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-28 10:31:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:46,709 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:31:46,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:31:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:31:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:31:46,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:46,710 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-28 10:31:46,710 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:46,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-28 10:31:46,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:46,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:46,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:46,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:46,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:47,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:47,169 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 [2018-09-28 10:31:47,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:47,262 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:47,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:47,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:48,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:48,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:31:48,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:31:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:31:48,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:48,581 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-28 10:31:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:48,923 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:31:48,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:31:48,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-28 10:31:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:48,924 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:31:48,924 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:31:48,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:31:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:31:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:31:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:31:48,926 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-28 10:31:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:48,927 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:31:48,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:31:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:31:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:31:48,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:48,927 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-28 10:31:48,928 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:48,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-28 10:31:48,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:48,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:48,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:48,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:48,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:49,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:49,744 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 [2018-09-28 10:31:49,751 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:49,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-28 10:31:49,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:49,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:50,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:50,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:31:50,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:31:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:31:50,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:50,125 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-28 10:31:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:50,407 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:31:50,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:31:50,408 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-28 10:31:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:50,408 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:31:50,408 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:31:50,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:31:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:31:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:31:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:31:50,412 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-28 10:31:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:50,412 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:31:50,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:31:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:31:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:31:50,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:50,413 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-28 10:31:50,413 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:50,414 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-28 10:31:50,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:50,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:50,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:50,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:50,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:50,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:50,710 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 [2018-09-28 10:31:50,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:50,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:31:50,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:50,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:51,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:51,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:31:51,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:31:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:31:51,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:51,205 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-28 10:31:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:51,519 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:31:51,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:31:51,519 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-28 10:31:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:51,520 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:31:51,520 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:31:51,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:31:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:31:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:31:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:31:51,525 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-28 10:31:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:51,525 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:31:51,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:31:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:31:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:31:51,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:51,526 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-28 10:31:51,526 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:51,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-28 10:31:51,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:51,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:51,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:51,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:51,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:51,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:51,988 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 [2018-09-28 10:31:51,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:52,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:52,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:52,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:31:52,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:31:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:31:52,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:52,265 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-28 10:31:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:52,618 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:31:52,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:31:52,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-28 10:31:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:52,619 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:31:52,619 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:31:52,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:31:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:31:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:31:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:31:52,625 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-28 10:31:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:52,625 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:31:52,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:31:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:31:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:31:52,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:52,626 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-28 10:31:52,627 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:52,627 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-28 10:31:52,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:52,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:52,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:52,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:52,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:53,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:53,158 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 [2018-09-28 10:31:53,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:53,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:53,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:53,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:53,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:53,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:31:53,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:31:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:31:53,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:53,576 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-28 10:31:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:54,012 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:31:54,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:31:54,013 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-28 10:31:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:54,014 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:31:54,014 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:31:54,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:31:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:31:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:31:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:31:54,017 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-28 10:31:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:54,018 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:31:54,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:31:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:31:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:31:54,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:54,019 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-28 10:31:54,019 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:54,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-28 10:31:54,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:54,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:54,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:54,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:54,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:54,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:54,755 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 [2018-09-28 10:31:54,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:54,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-28 10:31:54,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:54,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:55,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:55,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:31:55,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:31:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:31:55,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:55,325 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-28 10:31:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:55,716 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:31:55,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:31:55,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-28 10:31:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:55,717 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:31:55,717 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:31:55,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:31:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:31:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:31:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:31:55,720 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-28 10:31:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:55,721 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:31:55,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:31:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:31:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:31:55,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:55,722 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-28 10:31:55,722 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:55,722 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-28 10:31:55,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:55,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:55,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:55,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:55,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:56,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:56,233 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 [2018-09-28 10:31:56,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:56,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:56,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:56,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:56,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:56,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:31:56,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:31:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:31:56,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:56,554 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-28 10:31:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:56,939 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:31:56,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:31:56,939 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-28 10:31:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:56,940 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:31:56,940 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:31:56,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:31:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:31:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:31:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:31:56,943 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-28 10:31:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:56,943 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:31:56,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:31:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:31:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:31:56,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:56,944 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-28 10:31:56,944 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:56,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-28 10:31:56,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:56,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:56,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:56,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:56,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:57,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:57,924 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) [2018-09-28 10:31:57,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:58,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-28 10:31:58,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:58,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:58,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:58,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:31:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:31:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:31:58,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:58,431 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-28 10:31:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:58,713 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:31:58,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:31:58,714 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-28 10:31:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:58,715 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:31:58,715 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:31:58,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:31:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:31:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:31:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:31:58,718 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-28 10:31:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:58,719 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:31:58,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:31:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:31:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:31:58,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:58,719 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-28 10:31:58,720 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:58,720 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:58,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-28 10:31:58,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:58,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:58,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:58,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:58,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:59,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:59,183 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 [2018-09-28 10:31:59,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:59,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:31:59,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:59,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:59,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:59,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:31:59,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:31:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:31:59,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:59,704 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-28 10:32:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:00,690 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:32:00,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:32:00,691 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-28 10:32:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:00,691 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:32:00,692 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:32:00,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:32:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:32:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:32:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-28 10:32:00,695 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-28 10:32:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:00,695 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-28 10:32:00,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:32:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-28 10:32:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:32:00,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:00,696 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-28 10:32:00,696 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:00,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-28 10:32:00,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:00,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:00,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:00,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:00,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:01,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:01,056 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 [2018-09-28 10:32:01,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:01,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:01,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:01,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:32:01,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:32:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:32:01,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:01,802 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-28 10:32:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:02,385 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:32:02,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:32:02,386 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-28 10:32:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:02,386 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:32:02,386 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:32:02,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:32:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:32:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:32:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-28 10:32:02,390 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-28 10:32:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:02,390 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-28 10:32:02,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:32:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-28 10:32:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:32:02,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:02,391 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-28 10:32:02,391 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:02,392 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-28 10:32:02,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:02,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:02,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:02,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:02,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:32:02,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:03,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:03,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:03,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:04,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:04,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:32:04,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:32:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:32:04,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:04,253 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-28 10:32:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:04,796 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:32:04,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:32:04,796 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-28 10:32:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:04,797 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:32:04,797 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:32:04,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:32:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:32:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:32:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-28 10:32:04,800 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-28 10:32:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:04,800 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-28 10:32:04,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:32:04,800 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-28 10:32:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:32:04,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:04,801 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-28 10:32:04,801 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:04,801 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-28 10:32:04,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:04,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:04,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:04,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:04,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:05,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:05,166 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 [2018-09-28 10:32:05,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:05,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-28 10:32:05,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:05,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:05,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:05,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:32:05,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:32:05,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:32:05,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:05,661 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-28 10:32:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:05,991 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:32:05,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:32:05,992 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-28 10:32:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:05,992 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:32:05,992 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:32:05,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:32:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:32:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:32:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-28 10:32:05,995 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-28 10:32:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:05,995 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-28 10:32:05,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:32:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-28 10:32:05,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:32:05,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:05,996 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-28 10:32:05,996 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:05,996 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-28 10:32:05,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:05,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:05,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:05,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:05,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:06,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:06,510 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 [2018-09-28 10:32:06,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:06,613 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:06,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:06,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:06,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:06,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:32:06,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:32:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:32:06,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:06,878 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-28 10:32:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:07,418 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:32:07,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:32:07,418 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-28 10:32:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:07,419 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:32:07,419 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:32:07,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:32:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:32:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:32:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-28 10:32:07,422 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-28 10:32:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:07,423 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-28 10:32:07,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:32:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-28 10:32:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:32:07,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:07,424 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-28 10:32:07,424 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:07,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-28 10:32:07,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:07,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:07,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:07,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:07,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:07,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:07,819 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 [2018-09-28 10:32:07,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:07,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-28 10:32:07,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:07,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:08,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:08,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:32:08,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:32:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:32:08,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:08,347 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-28 10:32:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:08,833 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:32:08,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:32:08,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-28 10:32:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:08,834 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:32:08,834 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:32:08,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:32:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:32:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:32:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-28 10:32:08,837 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-28 10:32:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:08,837 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-28 10:32:08,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:32:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-28 10:32:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:32:08,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:08,838 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-28 10:32:08,838 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:08,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-28 10:32:08,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:08,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:08,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:08,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:08,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:09,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:09,422 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 [2018-09-28 10:32:09,430 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:09,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:32:09,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:09,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:09,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:09,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:32:09,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:32:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:32:09,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:09,906 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-28 10:32:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:10,435 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:32:10,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:32:10,436 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-28 10:32:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:10,436 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:32:10,437 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:32:10,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:32:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:32:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:32:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-28 10:32:10,439 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-28 10:32:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:10,439 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-28 10:32:10,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:32:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-28 10:32:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:32:10,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:10,440 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-28 10:32:10,440 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:10,440 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-28 10:32:10,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:10,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:10,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:10,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:10,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:11,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:11,125 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 [2018-09-28 10:32:11,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:11,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:11,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:11,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:32:11,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:32:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:32:11,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:11,691 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-28 10:32:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:12,167 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:32:12,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:32:12,167 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-28 10:32:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:12,168 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:32:12,168 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:32:12,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:32:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:32:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:32:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-28 10:32:12,171 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-28 10:32:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:12,172 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-28 10:32:12,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:32:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-28 10:32:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:32:12,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:12,172 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-28 10:32:12,173 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:12,173 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-28 10:32:12,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:12,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:12,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:12,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:12,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:12,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:12,659 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 [2018-09-28 10:32:12,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:12,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:12,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:12,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:13,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:13,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:32:13,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:32:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:32:13,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:13,052 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-28 10:32:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:13,490 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:32:13,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:32:13,490 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-28 10:32:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:13,491 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:32:13,491 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:32:13,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:32:13,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:32:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:32:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-28 10:32:13,494 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-28 10:32:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:13,494 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-28 10:32:13,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:32:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-28 10:32:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:32:13,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:13,495 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-28 10:32:13,495 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:13,495 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-28 10:32:13,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:13,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:13,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:13,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:13,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:13,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:13,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:32:13,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:14,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-28 10:32:14,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:14,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:14,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:14,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:32:14,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:32:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:32:14,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:14,338 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-28 10:32:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:14,806 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:32:14,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:32:14,806 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-28 10:32:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:14,807 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:32:14,807 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:32:14,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:32:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:32:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:32:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-28 10:32:14,811 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-28 10:32:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:14,811 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-28 10:32:14,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:32:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-28 10:32:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:32:14,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:14,812 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-28 10:32:14,812 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:14,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-28 10:32:14,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:14,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:14,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:14,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:15,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:15,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:32:15,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:15,317 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:15,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:15,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:15,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:15,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:32:15,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:32:15,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:32:15,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:15,665 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-28 10:32:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:16,239 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:32:16,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:32:16,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-28 10:32:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:16,240 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:32:16,240 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:32:16,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:32:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:32:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:32:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-28 10:32:16,243 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-28 10:32:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:16,243 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-28 10:32:16,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:32:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-28 10:32:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:32:16,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:16,244 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-28 10:32:16,244 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:16,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:16,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-28 10:32:16,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:16,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:16,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:16,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:16,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:16,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:16,875 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 [2018-09-28 10:32:16,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:17,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-28 10:32:17,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:17,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:17,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:17,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:32:17,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:32:17,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:32:17,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:17,330 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-28 10:32:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:17,930 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:32:17,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:32:17,930 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-28 10:32:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:17,931 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:32:17,931 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:32:17,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:32:17,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:32:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:32:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-28 10:32:17,935 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-28 10:32:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:17,935 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-28 10:32:17,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:32:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-28 10:32:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:32:17,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:17,936 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-28 10:32:17,936 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:17,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-28 10:32:17,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:17,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:17,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:17,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:17,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:18,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:18,316 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 [2018-09-28 10:32:18,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:18,490 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:32:18,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:18,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:18,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:18,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:32:18,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:32:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:32:18,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:18,806 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-28 10:32:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:19,327 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:32:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:32:19,327 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-28 10:32:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:19,328 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:32:19,328 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:32:19,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:32:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:32:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:32:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-28 10:32:19,331 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-28 10:32:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:19,331 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-28 10:32:19,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:32:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-28 10:32:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:32:19,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:19,332 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-28 10:32:19,332 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:19,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-28 10:32:19,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:19,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:19,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:19,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:19,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:19,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:19,772 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 [2018-09-28 10:32:19,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:19,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:20,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:20,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:32:20,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:32:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:32:20,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:20,393 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-28 10:32:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:20,986 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:32:20,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:32:20,986 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-28 10:32:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:20,987 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:32:20,987 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:32:20,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:32:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:32:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:32:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-28 10:32:20,990 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-28 10:32:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:20,990 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-28 10:32:20,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:32:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-28 10:32:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:32:20,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:20,991 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-28 10:32:20,991 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:20,991 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-28 10:32:20,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:20,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:20,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:20,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:20,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:21,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:21,434 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 [2018-09-28 10:32:21,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:21,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:21,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:21,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:21,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:21,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:32:21,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:32:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:32:21,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:21,995 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-28 10:32:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:22,642 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:32:22,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:32:22,643 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-28 10:32:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:22,643 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:32:22,644 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:32:22,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:32:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:32:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:32:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-28 10:32:22,647 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-28 10:32:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:22,647 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-28 10:32:22,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:32:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-28 10:32:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:32:22,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:22,648 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-28 10:32:22,648 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:22,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-28 10:32:22,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:22,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:22,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:22,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:22,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:23,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:23,067 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 [2018-09-28 10:32:23,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:23,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-28 10:32:23,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:23,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:23,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:23,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:32:23,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:32:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:32:23,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:23,528 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-28 10:32:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:24,241 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:32:24,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:32:24,242 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-28 10:32:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:24,242 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:32:24,243 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:32:24,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:32:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:32:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:32:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-28 10:32:24,246 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-28 10:32:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:24,246 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-28 10:32:24,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:32:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-28 10:32:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-28 10:32:24,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:24,247 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-28 10:32:24,247 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:24,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-28 10:32:24,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:24,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:24,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:24,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:24,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:24,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:24,800 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 [2018-09-28 10:32:24,808 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:24,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:24,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:24,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:25,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:25,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:32:25,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:32:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:32:25,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:25,196 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-28 10:32:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:25,879 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:32:25,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:32:25,880 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-28 10:32:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:25,880 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:32:25,881 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:32:25,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:32:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:32:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:32:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-28 10:32:25,885 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-28 10:32:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:25,886 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-28 10:32:25,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:32:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-28 10:32:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:32:25,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:25,887 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-28 10:32:25,887 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:25,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-28 10:32:25,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:25,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:25,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:25,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:25,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:26,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:26,345 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 [2018-09-28 10:32:26,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:26,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-28 10:32:26,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:26,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:26,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:26,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:32:26,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:32:26,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:32:26,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:26,985 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-28 10:32:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:27,701 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:32:27,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:32:27,701 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-28 10:32:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:27,702 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:32:27,702 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:32:27,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:32:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:32:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:32:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-28 10:32:27,706 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-28 10:32:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:27,706 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-28 10:32:27,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:32:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-28 10:32:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-28 10:32:27,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:27,707 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-28 10:32:27,708 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:27,708 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-28 10:32:27,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:27,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:27,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:28,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:28,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:32:28,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:28,396 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:32:28,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:28,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:28,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:28,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:32:28,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:32:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:32:28,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:28,762 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-28 10:32:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:29,278 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:32:29,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:32:29,278 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-28 10:32:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:29,279 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:32:29,279 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:32:29,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:32:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:32:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:32:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-28 10:32:29,284 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-28 10:32:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:29,284 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-28 10:32:29,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:32:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-28 10:32:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:32:29,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:29,285 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-28 10:32:29,285 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:29,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-28 10:32:29,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:29,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:29,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:29,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:29,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:29,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:29,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:29,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:29,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:30,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:30,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:32:30,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:32:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:32:30,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:30,222 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-28 10:32:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:30,978 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:32:30,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:32:30,979 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-28 10:32:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:30,979 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:32:30,979 INFO L226 Difference]: Without dead ends: 153 [2018-09-28 10:32:30,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-28 10:32:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-28 10:32:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-28 10:32:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-28 10:32:30,982 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-28 10:32:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:30,982 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-28 10:32:30,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:32:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-28 10:32:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:32:30,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:30,983 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-28 10:32:30,983 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:30,983 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-28 10:32:30,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:30,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:30,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:31,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:31,454 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 [2018-09-28 10:32:31,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:31,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:31,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:31,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:32,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:32,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:32:32,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:32:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:32:32,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:32,086 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-28 10:32:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:32,689 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-28 10:32:32,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:32:32,689 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-28 10:32:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:32,690 INFO L225 Difference]: With dead ends: 157 [2018-09-28 10:32:32,690 INFO L226 Difference]: Without dead ends: 155 [2018-09-28 10:32:32,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-28 10:32:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-28 10:32:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-28 10:32:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-28 10:32:32,693 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-28 10:32:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:32,693 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-28 10:32:32,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:32:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-28 10:32:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-28 10:32:32,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:32,694 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-28 10:32:32,694 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:32,694 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-28 10:32:32,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:32,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:32,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:32,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:32,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:33,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:33,179 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 [2018-09-28 10:32:33,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:33,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-28 10:32:33,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:33,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:33,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:33,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:32:33,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:32:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:32:33,678 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:33,678 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-28 10:32:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:34,281 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-28 10:32:34,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:32:34,281 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-28 10:32:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:34,282 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:32:34,282 INFO L226 Difference]: Without dead ends: 157 [2018-09-28 10:32:34,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-28 10:32:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-28 10:32:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-28 10:32:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-28 10:32:34,284 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-28 10:32:34,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:34,285 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-28 10:32:34,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:32:34,285 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-28 10:32:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-28 10:32:34,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:34,285 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-28 10:32:34,286 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:34,286 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:34,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-28 10:32:34,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:34,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:34,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:34,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:34,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:34,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:34,755 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 [2018-09-28 10:32:34,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:34,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:34,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:34,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:35,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:35,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:32:35,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:32:35,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:32:35,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:35,197 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-28 10:32:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:36,052 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-28 10:32:36,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:32:36,052 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-28 10:32:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:36,053 INFO L225 Difference]: With dead ends: 161 [2018-09-28 10:32:36,053 INFO L226 Difference]: Without dead ends: 159 [2018-09-28 10:32:36,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-28 10:32:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-28 10:32:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-28 10:32:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-28 10:32:36,056 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-28 10:32:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:36,057 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-28 10:32:36,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:32:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-28 10:32:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-28 10:32:36,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:36,057 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-28 10:32:36,058 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:36,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-28 10:32:36,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:36,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:36,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:36,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:36,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:36,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:36,542 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 [2018-09-28 10:32:36,549 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:36,756 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-28 10:32:36,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:36,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:37,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:37,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:32:37,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:32:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:32:37,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:37,259 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-28 10:32:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:38,203 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-28 10:32:38,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:32:38,203 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-28 10:32:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:38,204 INFO L225 Difference]: With dead ends: 163 [2018-09-28 10:32:38,204 INFO L226 Difference]: Without dead ends: 161 [2018-09-28 10:32:38,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-28 10:32:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-28 10:32:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-28 10:32:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-28 10:32:38,207 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-28 10:32:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:38,207 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-28 10:32:38,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:32:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-28 10:32:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-28 10:32:38,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:38,209 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-28 10:32:38,209 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:38,209 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-28 10:32:38,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:38,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:38,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:38,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:38,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:38,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:38,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:32:38,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:38,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-28 10:32:38,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:38,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:39,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:39,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:32:39,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:32:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:32:39,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:39,218 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-28 10:32:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:39,873 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-28 10:32:39,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:32:39,873 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-28 10:32:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:39,874 INFO L225 Difference]: With dead ends: 165 [2018-09-28 10:32:39,874 INFO L226 Difference]: Without dead ends: 163 [2018-09-28 10:32:39,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-28 10:32:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-28 10:32:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-28 10:32:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-28 10:32:39,878 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-28 10:32:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:39,878 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-28 10:32:39,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:32:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-28 10:32:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-28 10:32:39,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:39,879 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-28 10:32:39,880 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:39,880 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:39,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-28 10:32:39,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:39,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:39,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:39,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:39,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:40,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:40,395 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 [2018-09-28 10:32:40,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:40,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:40,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:40,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:32:40,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:32:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:32:40,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:40,918 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-28 10:32:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:41,676 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-28 10:32:41,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:32:41,677 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-28 10:32:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:41,678 INFO L225 Difference]: With dead ends: 167 [2018-09-28 10:32:41,678 INFO L226 Difference]: Without dead ends: 165 [2018-09-28 10:32:41,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-28 10:32:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-28 10:32:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-28 10:32:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-28 10:32:41,681 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-28 10:32:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:41,681 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-28 10:32:41,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:32:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-28 10:32:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-28 10:32:41,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:41,682 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-28 10:32:41,683 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:41,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-28 10:32:41,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:41,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:41,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:41,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:41,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:42,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:42,454 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 [2018-09-28 10:32:42,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:42,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:42,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:42,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:42,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:42,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:32:42,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:32:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:32:42,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:42,932 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-28 10:32:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:43,849 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-28 10:32:43,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:32:43,849 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-28 10:32:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:43,850 INFO L225 Difference]: With dead ends: 169 [2018-09-28 10:32:43,850 INFO L226 Difference]: Without dead ends: 167 [2018-09-28 10:32:43,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-28 10:32:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-28 10:32:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-28 10:32:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-28 10:32:43,853 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-28 10:32:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:43,853 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-28 10:32:43,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:32:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-28 10:32:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-28 10:32:43,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:43,854 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-28 10:32:43,855 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:43,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-28 10:32:43,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:43,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:43,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:43,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:43,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:44,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:44,404 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 [2018-09-28 10:32:44,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:44,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-28 10:32:44,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:44,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:45,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:45,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:32:45,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:32:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:32:45,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:45,038 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-28 10:32:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:45,852 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-28 10:32:45,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:32:45,852 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-28 10:32:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:45,853 INFO L225 Difference]: With dead ends: 171 [2018-09-28 10:32:45,853 INFO L226 Difference]: Without dead ends: 169 [2018-09-28 10:32:45,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-28 10:32:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-28 10:32:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-28 10:32:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-28 10:32:45,856 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-28 10:32:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:45,857 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-28 10:32:45,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:32:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-28 10:32:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-28 10:32:45,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:45,857 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-28 10:32:45,858 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:45,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-28 10:32:45,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:45,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:45,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:45,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:45,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:46,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:46,423 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 [2018-09-28 10:32:46,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:46,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:46,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:46,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:46,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:46,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:32:46,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:32:46,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:32:46,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:46,914 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-28 10:32:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:47,705 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-28 10:32:47,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:32:47,705 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-28 10:32:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:47,706 INFO L225 Difference]: With dead ends: 173 [2018-09-28 10:32:47,706 INFO L226 Difference]: Without dead ends: 171 [2018-09-28 10:32:47,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-28 10:32:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-28 10:32:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-28 10:32:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-28 10:32:47,709 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-28 10:32:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:47,709 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-28 10:32:47,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:32:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-28 10:32:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-28 10:32:47,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:47,710 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-28 10:32:47,710 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:47,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:47,710 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-28 10:32:47,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:47,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:47,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:47,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:47,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:48,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:48,553 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 [2018-09-28 10:32:48,561 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:48,802 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-28 10:32:48,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:48,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:49,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:49,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:32:49,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:32:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:32:49,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:49,145 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-28 10:32:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:49,891 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-28 10:32:49,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:32:49,891 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-28 10:32:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:49,892 INFO L225 Difference]: With dead ends: 175 [2018-09-28 10:32:49,892 INFO L226 Difference]: Without dead ends: 173 [2018-09-28 10:32:49,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-28 10:32:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-28 10:32:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-28 10:32:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-28 10:32:49,895 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-28 10:32:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:49,895 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-28 10:32:49,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:32:49,895 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-28 10:32:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-28 10:32:49,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:49,896 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-28 10:32:49,896 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:49,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-28 10:32:49,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:49,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:49,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:49,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:49,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:50,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:50,460 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 [2018-09-28 10:32:50,468 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:50,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-28 10:32:50,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:50,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:51,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:51,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:32:51,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:32:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:32:51,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:51,041 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-28 10:32:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:51,919 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-28 10:32:51,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:32:51,920 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-28 10:32:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:51,920 INFO L225 Difference]: With dead ends: 177 [2018-09-28 10:32:51,920 INFO L226 Difference]: Without dead ends: 175 [2018-09-28 10:32:51,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-28 10:32:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-28 10:32:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-28 10:32:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-28 10:32:51,924 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-28 10:32:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:51,925 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-28 10:32:51,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:32:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-28 10:32:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-28 10:32:51,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:51,926 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-28 10:32:51,926 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:51,926 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:51,926 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-28 10:32:51,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:51,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:51,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:51,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:51,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:52,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:52,767 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 [2018-09-28 10:32:52,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:52,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:53,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:53,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:32:53,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:32:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:32:53,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:53,274 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-28 10:32:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:54,049 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-28 10:32:54,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:32:54,049 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-28 10:32:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:54,050 INFO L225 Difference]: With dead ends: 179 [2018-09-28 10:32:54,050 INFO L226 Difference]: Without dead ends: 177 [2018-09-28 10:32:54,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-28 10:32:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-28 10:32:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-28 10:32:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-28 10:32:54,053 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-28 10:32:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:54,054 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-28 10:32:54,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:32:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-28 10:32:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-28 10:32:54,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:54,055 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-28 10:32:54,055 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:54,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-28 10:32:54,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:54,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:54,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:54,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:54,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:54,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:54,698 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 [2018-09-28 10:32:54,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:54,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:54,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:54,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:55,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:55,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:32:55,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:32:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:32:55,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:55,212 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-28 10:32:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:56,114 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-28 10:32:56,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:32:56,114 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-28 10:32:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:56,115 INFO L225 Difference]: With dead ends: 181 [2018-09-28 10:32:56,115 INFO L226 Difference]: Without dead ends: 179 [2018-09-28 10:32:56,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-28 10:32:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-28 10:32:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-28 10:32:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-28 10:32:56,118 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-28 10:32:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:56,118 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-28 10:32:56,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:32:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-28 10:32:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-28 10:32:56,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:56,119 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-28 10:32:56,120 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:56,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-28 10:32:56,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:56,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:56,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:56,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:56,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:56,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:56,769 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 [2018-09-28 10:32:56,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:57,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-28 10:32:57,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:57,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:57,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:57,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:32:57,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:32:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:32:57,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:57,397 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-28 10:32:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:58,291 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-28 10:32:58,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:32:58,292 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-28 10:32:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:58,293 INFO L225 Difference]: With dead ends: 183 [2018-09-28 10:32:58,293 INFO L226 Difference]: Without dead ends: 181 [2018-09-28 10:32:58,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-28 10:32:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-28 10:32:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-28 10:32:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-28 10:32:58,296 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-28 10:32:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:58,296 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-28 10:32:58,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:32:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-28 10:32:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-28 10:32:58,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:58,297 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-28 10:32:58,297 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:58,297 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-28 10:32:58,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:58,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:58,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:58,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:58,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:58,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:58,909 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 [2018-09-28 10:32:58,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:59,056 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:59,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:59,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:59,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:59,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:32:59,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:32:59,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:32:59,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:59,425 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-28 10:33:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:00,369 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-28 10:33:00,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:33:00,370 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-28 10:33:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:00,371 INFO L225 Difference]: With dead ends: 185 [2018-09-28 10:33:00,371 INFO L226 Difference]: Without dead ends: 183 [2018-09-28 10:33:00,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-28 10:33:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-28 10:33:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-28 10:33:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-28 10:33:00,374 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-28 10:33:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:00,374 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-28 10:33:00,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:33:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-28 10:33:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-28 10:33:00,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:00,375 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-28 10:33:00,375 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:00,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:00,375 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-28 10:33:00,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:00,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:00,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:00,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:00,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:01,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:01,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:01,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:33:01,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-28 10:33:01,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:01,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:01,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:01,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:33:01,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:33:01,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:33:01,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:01,644 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-28 10:33:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:02,464 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-28 10:33:02,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:33:02,465 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-28 10:33:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:02,466 INFO L225 Difference]: With dead ends: 187 [2018-09-28 10:33:02,466 INFO L226 Difference]: Without dead ends: 185 [2018-09-28 10:33:02,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-28 10:33:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-28 10:33:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-28 10:33:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-28 10:33:02,470 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-28 10:33:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:02,470 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-28 10:33:02,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:33:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-28 10:33:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-28 10:33:02,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:02,471 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-28 10:33:02,471 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:02,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-28 10:33:02,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:02,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:02,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:02,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:02,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:03,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:03,268 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 [2018-09-28 10:33:03,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:33:03,529 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-28 10:33:03,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:03,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:03,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:03,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:33:03,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:33:03,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:33:03,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:03,896 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-28 10:33:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:04,767 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-28 10:33:04,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:33:04,767 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-28 10:33:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:04,768 INFO L225 Difference]: With dead ends: 189 [2018-09-28 10:33:04,768 INFO L226 Difference]: Without dead ends: 187 [2018-09-28 10:33:04,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-28 10:33:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-28 10:33:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-28 10:33:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-28 10:33:04,772 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-28 10:33:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:04,773 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-28 10:33:04,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:33:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-28 10:33:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-28 10:33:04,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:04,774 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-28 10:33:04,774 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:04,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:04,774 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-28 10:33:04,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:04,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:04,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:04,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:04,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:05,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:05,408 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 [2018-09-28 10:33:05,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:05,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:05,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:05,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:33:05,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:33:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:33:05,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:05,948 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-28 10:33:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:06,788 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-28 10:33:06,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:33:06,789 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-28 10:33:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:06,790 INFO L225 Difference]: With dead ends: 191 [2018-09-28 10:33:06,790 INFO L226 Difference]: Without dead ends: 189 [2018-09-28 10:33:06,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-28 10:33:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-28 10:33:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-28 10:33:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-28 10:33:06,794 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-28 10:33:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:06,794 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-28 10:33:06,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:33:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-28 10:33:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-28 10:33:06,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:06,795 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-28 10:33:06,795 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:06,796 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-28 10:33:06,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:06,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:06,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:06,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:06,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:07,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:07,461 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 [2018-09-28 10:33:07,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:33:07,619 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:33:07,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:07,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:08,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:08,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:33:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:33:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:33:08,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:08,142 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-28 10:33:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:08,983 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-28 10:33:08,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:33:08,983 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-28 10:33:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:08,984 INFO L225 Difference]: With dead ends: 193 [2018-09-28 10:33:08,984 INFO L226 Difference]: Without dead ends: 191 [2018-09-28 10:33:08,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-28 10:33:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-28 10:33:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-28 10:33:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-28 10:33:08,988 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-28 10:33:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:08,988 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-28 10:33:08,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:33:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-28 10:33:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-28 10:33:08,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:08,989 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-28 10:33:08,990 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:08,990 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-28 10:33:08,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:08,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:08,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:08,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:08,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:09,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:09,650 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 [2018-09-28 10:33:09,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:33:09,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-28 10:33:09,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:09,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:10,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:10,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:33:10,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:33:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:33:10,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:10,322 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-28 10:33:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:11,335 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-28 10:33:11,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:33:11,335 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-28 10:33:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:11,336 INFO L225 Difference]: With dead ends: 195 [2018-09-28 10:33:11,336 INFO L226 Difference]: Without dead ends: 193 [2018-09-28 10:33:11,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-28 10:33:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-28 10:33:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-28 10:33:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-28 10:33:11,339 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-28 10:33:11,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:11,340 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-28 10:33:11,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:33:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-28 10:33:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-28 10:33:11,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:11,341 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-28 10:33:11,341 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:11,341 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-28 10:33:11,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:11,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:11,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:11,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:12,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:12,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:12,040 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:33:12,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:33:12,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:12,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:12,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:12,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:33:12,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:33:12,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:33:12,678 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:12,678 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-28 10:33:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:13,720 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-28 10:33:13,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:33:13,720 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-28 10:33:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:13,721 INFO L225 Difference]: With dead ends: 197 [2018-09-28 10:33:13,721 INFO L226 Difference]: Without dead ends: 195 [2018-09-28 10:33:13,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:13,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-28 10:33:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-28 10:33:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-28 10:33:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-28 10:33:13,724 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-28 10:33:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:13,724 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-28 10:33:13,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:33:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-28 10:33:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-28 10:33:13,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:13,725 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-28 10:33:13,725 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:13,725 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-28 10:33:13,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:13,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:13,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:13,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:13,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:14,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:14,413 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 [2018-09-28 10:33:14,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:33:14,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-28 10:33:14,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:14,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:15,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:15,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:33:15,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:33:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:33:15,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:15,086 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-28 10:33:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:16,155 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-28 10:33:16,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:33:16,155 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-28 10:33:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:16,156 INFO L225 Difference]: With dead ends: 199 [2018-09-28 10:33:16,156 INFO L226 Difference]: Without dead ends: 197 [2018-09-28 10:33:16,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-28 10:33:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-28 10:33:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-28 10:33:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-28 10:33:16,160 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-28 10:33:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:16,160 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-28 10:33:16,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:33:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-28 10:33:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-28 10:33:16,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:16,162 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-28 10:33:16,162 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:16,162 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:16,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-28 10:33:16,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:16,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:16,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:16,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:16,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:16,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:16,938 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 [2018-09-28 10:33:16,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:33:17,234 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-28 10:33:17,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:17,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:17,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:17,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:33:17,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:33:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:33:17,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:17,625 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-28 10:33:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:18,571 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-28 10:33:18,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:33:18,571 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-28 10:33:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:18,572 INFO L225 Difference]: With dead ends: 201 [2018-09-28 10:33:18,572 INFO L226 Difference]: Without dead ends: 199 [2018-09-28 10:33:18,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-28 10:33:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-28 10:33:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-28 10:33:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-28 10:33:18,577 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-28 10:33:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:18,577 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-28 10:33:18,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:33:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-28 10:33:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-28 10:33:18,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:18,578 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-28 10:33:18,578 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:18,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-28 10:33:18,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:18,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:18,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:18,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:18,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:19,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:19,297 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 [2018-09-28 10:33:19,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:19,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:19,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:19,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:33:19,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:33:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:33:19,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:19,865 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-28 10:33:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:20,905 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-28 10:33:20,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:33:20,905 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-28 10:33:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:20,906 INFO L225 Difference]: With dead ends: 203 [2018-09-28 10:33:20,906 INFO L226 Difference]: Without dead ends: 201 [2018-09-28 10:33:20,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-28 10:33:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-28 10:33:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-28 10:33:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-28 10:33:20,909 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-28 10:33:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:20,909 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-28 10:33:20,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:33:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-28 10:33:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-28 10:33:20,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:20,910 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-28 10:33:20,910 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:20,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-28 10:33:20,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:20,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:20,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:20,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:20,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:21,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:21,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:21,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:33:21,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:33:21,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:21,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:22,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:22,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:33:22,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:33:22,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:33:22,187 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:22,187 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-28 10:33:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:23,208 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-28 10:33:23,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:33:23,208 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-28 10:33:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:23,209 INFO L225 Difference]: With dead ends: 205 [2018-09-28 10:33:23,209 INFO L226 Difference]: Without dead ends: 203 [2018-09-28 10:33:23,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-28 10:33:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-28 10:33:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-28 10:33:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-28 10:33:23,213 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-28 10:33:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:23,213 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-28 10:33:23,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:33:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-28 10:33:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-28 10:33:23,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:23,214 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-28 10:33:23,215 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:23,215 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:23,215 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-28 10:33:23,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:23,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:23,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:23,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:23,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:23,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:23,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:23,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:33:24,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-28 10:33:24,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:24,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:24,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:24,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:33:24,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:33:24,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:33:24,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:24,735 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-28 10:33:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:25,698 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-28 10:33:25,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:33:25,698 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-28 10:33:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:25,699 INFO L225 Difference]: With dead ends: 207 [2018-09-28 10:33:25,699 INFO L226 Difference]: Without dead ends: 205 [2018-09-28 10:33:25,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-28 10:33:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-28 10:33:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-28 10:33:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-28 10:33:25,703 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-28 10:33:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:25,703 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-28 10:33:25,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:33:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-28 10:33:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-28 10:33:25,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:25,704 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-28 10:33:25,704 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:25,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-28 10:33:25,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:25,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:25,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:25,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:25,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:26,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:26,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:26,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:33:26,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:33:26,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:26,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:27,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:27,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:33:27,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:33:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:33:27,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:27,211 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-28 10:33:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:28,359 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-28 10:33:28,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:33:28,359 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-28 10:33:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:28,360 INFO L225 Difference]: With dead ends: 209 [2018-09-28 10:33:28,360 INFO L226 Difference]: Without dead ends: 207 [2018-09-28 10:33:28,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-28 10:33:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-28 10:33:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-28 10:33:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-28 10:33:28,365 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-28 10:33:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:28,365 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-28 10:33:28,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:33:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-28 10:33:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-28 10:33:28,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:28,373 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-28 10:33:28,373 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:28,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-28 10:33:28,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:28,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:28,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:28,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:28,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:29,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:29,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:29,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:33:29,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-28 10:33:29,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:29,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:30,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:30,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:33:30,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:33:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:33:30,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:30,230 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-28 10:33:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:31,496 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-28 10:33:31,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:33:31,497 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-28 10:33:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:31,498 INFO L225 Difference]: With dead ends: 211 [2018-09-28 10:33:31,498 INFO L226 Difference]: Without dead ends: 209 [2018-09-28 10:33:31,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-28 10:33:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-28 10:33:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-28 10:33:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-28 10:33:31,501 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-28 10:33:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:31,502 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-28 10:33:31,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:33:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-28 10:33:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-28 10:33:31,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:31,502 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-28 10:33:31,503 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:31,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:31,503 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-28 10:33:31,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:31,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:31,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:31,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:31,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:32,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:32,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:32,324 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:33:32,634 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-28 10:33:32,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:32,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:33,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:33,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:33:33,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:33:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:33:33,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:33,049 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-28 10:33:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:34,274 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-28 10:33:34,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:33:34,274 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-28 10:33:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:34,275 INFO L225 Difference]: With dead ends: 213 [2018-09-28 10:33:34,275 INFO L226 Difference]: Without dead ends: 211 [2018-09-28 10:33:34,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-28 10:33:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-28 10:33:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-28 10:33:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-28 10:33:34,279 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-28 10:33:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:34,279 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-28 10:33:34,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:33:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-28 10:33:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-28 10:33:34,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:34,280 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-28 10:33:34,281 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:34,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-28 10:33:34,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:34,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:34,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:34,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:34,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:35,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:35,078 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 [2018-09-28 10:33:35,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:35,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:35,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:35,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:33:35,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:33:35,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:33:35,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:35,715 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-28 10:33:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:36,883 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-28 10:33:36,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:33:36,883 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-28 10:33:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:36,884 INFO L225 Difference]: With dead ends: 215 [2018-09-28 10:33:36,884 INFO L226 Difference]: Without dead ends: 213 [2018-09-28 10:33:36,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-28 10:33:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-28 10:33:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-28 10:33:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-28 10:33:36,888 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-28 10:33:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:36,889 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-28 10:33:36,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:33:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-28 10:33:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-28 10:33:36,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:36,890 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-28 10:33:36,890 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:36,890 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-28 10:33:36,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:36,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:36,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:36,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:36,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:37,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:37,685 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 [2018-09-28 10:33:37,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:33:37,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:33:37,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:37,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:38,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:38,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:33:38,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:33:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:33:38,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:38,389 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-28 10:33:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:39,803 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-28 10:33:39,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:33:39,804 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-28 10:33:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:39,804 INFO L225 Difference]: With dead ends: 217 [2018-09-28 10:33:39,804 INFO L226 Difference]: Without dead ends: 215 [2018-09-28 10:33:39,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-28 10:33:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-28 10:33:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-28 10:33:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-28 10:33:39,808 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-28 10:33:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:39,809 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-28 10:33:39,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:33:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-28 10:33:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-28 10:33:39,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:39,810 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-28 10:33:39,810 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:39,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-28 10:33:39,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:39,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:39,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:40,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:40,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:33:40,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:33:41,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-28 10:33:41,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:41,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:41,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:41,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:33:41,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:33:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:33:41,492 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:41,492 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-28 10:33:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:42,986 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-28 10:33:42,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:33:42,986 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-28 10:33:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:42,987 INFO L225 Difference]: With dead ends: 219 [2018-09-28 10:33:42,987 INFO L226 Difference]: Without dead ends: 217 [2018-09-28 10:33:42,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-28 10:33:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-28 10:33:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-28 10:33:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-28 10:33:42,993 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-28 10:33:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:42,993 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-28 10:33:42,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:33:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-28 10:33:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-28 10:33:42,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:42,994 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-28 10:33:42,994 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:42,994 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-28 10:33:42,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:42,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:42,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:42,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:42,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:43,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:43,997 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 [2018-09-28 10:33:44,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:33:44,163 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:33:44,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:44,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:44,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:44,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:33:44,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:33:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:33:44,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:44,612 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-28 10:33:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:46,069 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-28 10:33:46,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:33:46,069 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-28 10:33:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:46,070 INFO L225 Difference]: With dead ends: 221 [2018-09-28 10:33:46,070 INFO L226 Difference]: Without dead ends: 219 [2018-09-28 10:33:46,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-28 10:33:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-28 10:33:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-28 10:33:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-28 10:33:46,073 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-28 10:33:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:46,073 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-28 10:33:46,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:33:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-28 10:33:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-28 10:33:46,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:46,074 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-28 10:33:46,074 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:46,074 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-28 10:33:46,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:46,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:46,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:46,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:46,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:46,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:46,939 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 [2018-09-28 10:33:46,946 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:33:47,277 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-28 10:33:47,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:47,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:47,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:47,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:33:47,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:33:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:33:47,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:47,800 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-28 10:33:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:48,941 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-28 10:33:48,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:33:48,941 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-28 10:33:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:48,942 INFO L225 Difference]: With dead ends: 223 [2018-09-28 10:33:48,942 INFO L226 Difference]: Without dead ends: 221 [2018-09-28 10:33:48,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-28 10:33:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-28 10:33:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-28 10:33:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-28 10:33:48,946 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-28 10:33:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:48,946 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-28 10:33:48,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:33:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-28 10:33:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-28 10:33:48,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:48,947 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-28 10:33:48,948 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:48,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-28 10:33:48,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:48,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:48,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:48,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:48,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:49,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:49,808 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 [2018-09-28 10:33:49,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:33:50,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-28 10:33:50,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:50,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:50,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:50,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-28 10:33:50,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-28 10:33:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-28 10:33:50,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:50,604 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-28 10:33:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:52,092 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-28 10:33:52,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-28 10:33:52,092 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-28 10:33:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:52,093 INFO L225 Difference]: With dead ends: 225 [2018-09-28 10:33:52,093 INFO L226 Difference]: Without dead ends: 223 [2018-09-28 10:33:52,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-28 10:33:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-28 10:33:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-28 10:33:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-28 10:33:52,096 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-28 10:33:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:52,096 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-28 10:33:52,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-28 10:33:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-28 10:33:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-28 10:33:52,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:52,097 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-28 10:33:52,097 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:52,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-28 10:33:52,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:52,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:52,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:52,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:52,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:52,982 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 [2018-09-28 10:33:52,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:53,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:53,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:53,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-28 10:33:53,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:33:53,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:33:53,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:53,624 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-28 10:33:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:55,237 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-28 10:33:55,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-28 10:33:55,238 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-28 10:33:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:55,238 INFO L225 Difference]: With dead ends: 227 [2018-09-28 10:33:55,239 INFO L226 Difference]: Without dead ends: 225 [2018-09-28 10:33:55,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-28 10:33:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-28 10:33:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-28 10:33:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-28 10:33:55,243 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-28 10:33:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:55,243 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-28 10:33:55,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:33:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-28 10:33:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-28 10:33:55,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:55,244 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-28 10:33:55,244 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:55,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:55,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-28 10:33:55,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:55,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:55,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:55,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:55,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:56,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:56,133 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 [2018-09-28 10:33:56,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:33:56,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:33:56,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:56,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:56,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:56,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-28 10:33:56,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-28 10:33:56,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-28 10:33:56,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:56,828 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-28 10:33:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:58,347 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-28 10:33:58,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-28 10:33:58,347 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-28 10:33:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:58,348 INFO L225 Difference]: With dead ends: 229 [2018-09-28 10:33:58,348 INFO L226 Difference]: Without dead ends: 227 [2018-09-28 10:33:58,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-28 10:33:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-28 10:33:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-28 10:33:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-28 10:33:58,351 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-28 10:33:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:58,351 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-28 10:33:58,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-28 10:33:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-28 10:33:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-28 10:33:58,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:58,352 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-28 10:33:58,352 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:58,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-28 10:33:58,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:58,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:58,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:58,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:58,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:33:59,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:59,461 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 [2018-09-28 10:33:59,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:33:59,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-28 10:33:59,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:59,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:00,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:00,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-28 10:34:00,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:34:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:34:00,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:00,323 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-09-28 10:34:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:01,872 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-09-28 10:34:01,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-28 10:34:01,873 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-28 10:34:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:01,873 INFO L225 Difference]: With dead ends: 231 [2018-09-28 10:34:01,873 INFO L226 Difference]: Without dead ends: 229 [2018-09-28 10:34:01,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-28 10:34:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-28 10:34:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-28 10:34:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-09-28 10:34:01,877 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-09-28 10:34:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:01,877 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-09-28 10:34:01,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:34:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-09-28 10:34:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-28 10:34:01,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:01,878 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-09-28 10:34:01,878 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:01,878 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:01,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-09-28 10:34:01,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:01,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:01,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:01,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:01,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:02,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:02,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:34:02,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:34:03,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:34:03,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:03,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:03,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-28 10:34:03,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-28 10:34:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-28 10:34:03,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:03,632 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-09-28 10:34:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:05,083 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-28 10:34:05,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-28 10:34:05,083 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-09-28 10:34:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:05,084 INFO L225 Difference]: With dead ends: 233 [2018-09-28 10:34:05,084 INFO L226 Difference]: Without dead ends: 231 [2018-09-28 10:34:05,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-28 10:34:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-28 10:34:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-28 10:34:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-28 10:34:05,086 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-09-28 10:34:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:05,087 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-28 10:34:05,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-28 10:34:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-28 10:34:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-28 10:34:05,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:05,087 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-09-28 10:34:05,087 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:05,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-09-28 10:34:05,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:05,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:05,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:05,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:05,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:06,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:06,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:34:06,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:34:06,414 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-28 10:34:06,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:06,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:07,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:07,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-28 10:34:07,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:34:07,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:34:07,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:07,067 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-09-28 10:34:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:08,603 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-09-28 10:34:08,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-28 10:34:08,603 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-28 10:34:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:08,604 INFO L225 Difference]: With dead ends: 235 [2018-09-28 10:34:08,604 INFO L226 Difference]: Without dead ends: 233 [2018-09-28 10:34:08,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-28 10:34:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-28 10:34:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-28 10:34:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-09-28 10:34:08,607 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-09-28 10:34:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:08,608 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-09-28 10:34:08,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:34:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-09-28 10:34:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-28 10:34:08,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:08,608 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-09-28 10:34:08,608 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:08,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-09-28 10:34:08,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:08,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:08,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:08,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:08,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:09,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:09,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:34:09,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:34:10,124 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-28 10:34:10,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:10,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:10,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:10,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-28 10:34:10,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-28 10:34:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-28 10:34:10,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:10,614 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-09-28 10:34:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:12,357 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-28 10:34:12,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-28 10:34:12,357 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-09-28 10:34:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:12,358 INFO L225 Difference]: With dead ends: 237 [2018-09-28 10:34:12,358 INFO L226 Difference]: Without dead ends: 235 [2018-09-28 10:34:12,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-28 10:34:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-28 10:34:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-28 10:34:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-28 10:34:12,361 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-09-28 10:34:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:12,361 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-28 10:34:12,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-28 10:34:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-28 10:34:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-28 10:34:12,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:12,362 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-09-28 10:34:12,362 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:12,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-09-28 10:34:12,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:12,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:12,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:12,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:12,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:13,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:13,345 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 [2018-09-28 10:34:13,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:34:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:13,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:14,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:14,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-28 10:34:14,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:34:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:34:14,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:14,030 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-09-28 10:34:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:15,755 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-09-28 10:34:15,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-28 10:34:15,755 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-28 10:34:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:15,756 INFO L225 Difference]: With dead ends: 239 [2018-09-28 10:34:15,756 INFO L226 Difference]: Without dead ends: 237 [2018-09-28 10:34:15,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-28 10:34:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-28 10:34:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-28 10:34:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-09-28 10:34:15,760 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-09-28 10:34:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:15,761 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-09-28 10:34:15,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:34:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-09-28 10:34:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-28 10:34:15,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:15,762 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-09-28 10:34:15,762 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:15,762 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-09-28 10:34:15,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:15,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:15,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:15,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:34:15,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:16,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:16,738 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 [2018-09-28 10:34:16,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:34:16,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:34:16,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:16,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:17,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:17,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-28 10:34:17,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-28 10:34:17,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-28 10:34:17,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:17,425 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-09-28 10:34:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:19,136 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-28 10:34:19,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-28 10:34:19,136 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-09-28 10:34:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:19,137 INFO L225 Difference]: With dead ends: 241 [2018-09-28 10:34:19,137 INFO L226 Difference]: Without dead ends: 239 [2018-09-28 10:34:19,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-28 10:34:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-28 10:34:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-28 10:34:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-28 10:34:19,140 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-09-28 10:34:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:19,141 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-28 10:34:19,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-28 10:34:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-28 10:34:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-28 10:34:19,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:19,141 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-09-28 10:34:19,142 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:19,142 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-09-28 10:34:19,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:19,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:19,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:19,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:19,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:20,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:20,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:34:20,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:34:20,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-28 10:34:20,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:20,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:21,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:21,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-28 10:34:21,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-28 10:34:21,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-28 10:34:21,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:21,192 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-09-28 10:34:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:22,634 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-09-28 10:34:22,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-28 10:34:22,634 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-28 10:34:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:22,635 INFO L225 Difference]: With dead ends: 243 [2018-09-28 10:34:22,635 INFO L226 Difference]: Without dead ends: 241 [2018-09-28 10:34:22,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-28 10:34:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-28 10:34:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-28 10:34:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-09-28 10:34:22,638 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-09-28 10:34:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:22,638 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-09-28 10:34:22,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-28 10:34:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-09-28 10:34:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-28 10:34:22,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:22,639 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-09-28 10:34:22,639 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:22,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-09-28 10:34:22,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:22,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:22,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:22,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:22,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:23,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:23,632 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 [2018-09-28 10:34:23,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:34:23,818 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:34:23,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:23,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:24,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:24,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-28 10:34:24,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-28 10:34:24,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-28 10:34:24,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:24,324 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-09-28 10:34:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:26,154 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-28 10:34:26,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-28 10:34:26,154 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-09-28 10:34:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:26,155 INFO L225 Difference]: With dead ends: 245 [2018-09-28 10:34:26,155 INFO L226 Difference]: Without dead ends: 243 [2018-09-28 10:34:26,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-28 10:34:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-28 10:34:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-28 10:34:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-28 10:34:26,158 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-09-28 10:34:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:26,158 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-28 10:34:26,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-28 10:34:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-28 10:34:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-28 10:34:26,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:26,159 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-09-28 10:34:26,159 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:26,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-09-28 10:34:26,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:26,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:26,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:26,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:26,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:27,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:27,151 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 [2018-09-28 10:34:27,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:34:27,562 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-28 10:34:27,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:27,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:28,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:28,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-28 10:34:28,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-28 10:34:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-28 10:34:28,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:28,074 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-09-28 10:34:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:29,673 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-09-28 10:34:29,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-28 10:34:29,673 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-28 10:34:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:29,674 INFO L225 Difference]: With dead ends: 247 [2018-09-28 10:34:29,674 INFO L226 Difference]: Without dead ends: 245 [2018-09-28 10:34:29,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-28 10:34:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-28 10:34:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-28 10:34:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-09-28 10:34:29,677 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-09-28 10:34:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:29,677 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-09-28 10:34:29,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-28 10:34:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-09-28 10:34:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-28 10:34:29,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:29,678 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-09-28 10:34:29,678 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:29,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-09-28 10:34:29,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:29,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:29,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:29,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:29,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:30,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:30,718 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 [2018-09-28 10:34:30,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:34:31,129 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-28 10:34:31,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:31,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:31,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:31,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-28 10:34:31,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-28 10:34:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-28 10:34:31,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:31,672 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-09-28 10:34:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:33,586 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-28 10:34:33,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-28 10:34:33,586 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-09-28 10:34:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:33,587 INFO L225 Difference]: With dead ends: 249 [2018-09-28 10:34:33,587 INFO L226 Difference]: Without dead ends: 247 [2018-09-28 10:34:33,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:33,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-28 10:34:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-28 10:34:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-28 10:34:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-28 10:34:33,590 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-09-28 10:34:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:33,591 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-28 10:34:33,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-28 10:34:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-28 10:34:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-28 10:34:33,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:33,591 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-09-28 10:34:33,592 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:33,592 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-09-28 10:34:33,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:33,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:33,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:33,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:33,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:34,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:34,676 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 [2018-09-28 10:34:34,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:34:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:34,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:35,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:35,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-28 10:34:35,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-28 10:34:35,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-28 10:34:35,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:35,532 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-09-28 10:34:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:37,161 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-09-28 10:34:37,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-28 10:34:37,161 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-28 10:34:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:37,162 INFO L225 Difference]: With dead ends: 251 [2018-09-28 10:34:37,162 INFO L226 Difference]: Without dead ends: 249 [2018-09-28 10:34:37,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-28 10:34:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-28 10:34:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-28 10:34:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-09-28 10:34:37,166 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-09-28 10:34:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:37,166 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-09-28 10:34:37,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-28 10:34:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-09-28 10:34:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-28 10:34:37,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:37,167 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-09-28 10:34:37,167 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:37,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-09-28 10:34:37,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:37,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:37,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:37,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:34:37,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:38,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:38,273 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 [2018-09-28 10:34:38,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:34:38,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:34:38,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:38,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:39,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:39,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-28 10:34:39,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-28 10:34:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-28 10:34:39,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:39,013 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-09-28 10:34:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:40,943 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-28 10:34:40,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-28 10:34:40,943 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-09-28 10:34:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:40,944 INFO L225 Difference]: With dead ends: 253 [2018-09-28 10:34:40,944 INFO L226 Difference]: Without dead ends: 251 [2018-09-28 10:34:40,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-28 10:34:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-28 10:34:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-28 10:34:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-28 10:34:40,947 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-09-28 10:34:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:40,948 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-28 10:34:40,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-28 10:34:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-28 10:34:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-28 10:34:40,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:40,949 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-09-28 10:34:40,949 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:40,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-09-28 10:34:40,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:40,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:40,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:40,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:40,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:42,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:42,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:34:42,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:34:42,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-28 10:34:42,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:42,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:43,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:43,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-28 10:34:43,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-28 10:34:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-28 10:34:43,110 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:43,110 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-09-28 10:34:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:45,205 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-09-28 10:34:45,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-28 10:34:45,205 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-28 10:34:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:45,206 INFO L225 Difference]: With dead ends: 255 [2018-09-28 10:34:45,206 INFO L226 Difference]: Without dead ends: 253 [2018-09-28 10:34:45,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-28 10:34:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-28 10:34:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-28 10:34:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-09-28 10:34:45,209 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-09-28 10:34:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:45,210 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-09-28 10:34:45,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-28 10:34:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-09-28 10:34:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-28 10:34:45,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:45,211 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-09-28 10:34:45,211 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:45,211 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-09-28 10:34:45,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:45,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:45,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:45,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:45,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:46,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:46,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:34:46,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:34:46,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:34:46,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:46,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:47,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:47,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-28 10:34:47,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-28 10:34:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-28 10:34:47,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:47,124 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-09-28 10:34:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:49,117 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-28 10:34:49,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-28 10:34:49,118 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-09-28 10:34:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:49,118 INFO L225 Difference]: With dead ends: 257 [2018-09-28 10:34:49,118 INFO L226 Difference]: Without dead ends: 255 [2018-09-28 10:34:49,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-28 10:34:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-28 10:34:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-28 10:34:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-28 10:34:49,122 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-09-28 10:34:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:49,122 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-28 10:34:49,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-28 10:34:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-28 10:34:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-28 10:34:49,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:49,123 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-09-28 10:34:49,124 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:49,124 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-09-28 10:34:49,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:49,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:49,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:49,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:49,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:50,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:50,434 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 [2018-09-28 10:34:50,441 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:34:50,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-28 10:34:50,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:50,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:51,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:51,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-28 10:34:51,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-28 10:34:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-28 10:34:51,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:51,426 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-09-28 10:34:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:53,368 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-09-28 10:34:53,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-28 10:34:53,369 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-28 10:34:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:53,369 INFO L225 Difference]: With dead ends: 259 [2018-09-28 10:34:53,369 INFO L226 Difference]: Without dead ends: 257 [2018-09-28 10:34:53,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-28 10:34:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-28 10:34:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-28 10:34:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-09-28 10:34:53,373 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-09-28 10:34:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:53,373 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-09-28 10:34:53,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-28 10:34:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-09-28 10:34:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-28 10:34:53,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:53,375 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-09-28 10:34:53,375 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:53,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-09-28 10:34:53,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:53,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:53,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:53,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:53,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:54,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:54,570 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 [2018-09-28 10:34:54,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:34:55,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-28 10:34:55,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:34:55,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:55,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:55,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-28 10:34:55,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-28 10:34:55,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-28 10:34:55,857 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:55,857 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-09-28 10:34:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:34:57,709 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-28 10:34:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-28 10:34:57,709 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-09-28 10:34:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:34:57,710 INFO L225 Difference]: With dead ends: 261 [2018-09-28 10:34:57,710 INFO L226 Difference]: Without dead ends: 259 [2018-09-28 10:34:57,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:34:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-28 10:34:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-28 10:34:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-28 10:34:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-28 10:34:57,714 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-09-28 10:34:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:34:57,714 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-28 10:34:57,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-28 10:34:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-28 10:34:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-28 10:34:57,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:34:57,716 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-09-28 10:34:57,716 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:34:57,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:34:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-09-28 10:34:57,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:34:57,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:34:57,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:57,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:34:57,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:34:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:58,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:34:58,881 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 [2018-09-28 10:34:58,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:34:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:34:59,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:34:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:34:59,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:34:59,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-28 10:34:59,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-28 10:34:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-28 10:34:59,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:34:59,693 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-09-28 10:35:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:35:01,608 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-09-28 10:35:01,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-28 10:35:01,609 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-28 10:35:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:35:01,610 INFO L225 Difference]: With dead ends: 263 [2018-09-28 10:35:01,610 INFO L226 Difference]: Without dead ends: 261 [2018-09-28 10:35:01,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:35:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-28 10:35:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-28 10:35:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-28 10:35:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-09-28 10:35:01,614 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-09-28 10:35:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:35:01,615 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-09-28 10:35:01,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-28 10:35:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-09-28 10:35:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-28 10:35:01,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:35:01,616 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-09-28 10:35:01,616 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:35:01,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:35:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-09-28 10:35:01,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:35:01,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:35:01,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:35:01,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:35:01,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:35:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:35:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:35:02,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:35:02,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:35:02,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:35:03,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:35:03,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:35:03,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:35:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:35:03,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:35:03,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-28 10:35:03,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-28 10:35:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-28 10:35:03,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:35:03,612 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-09-28 10:35:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:35:05,878 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-28 10:35:05,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-28 10:35:05,879 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-09-28 10:35:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:35:05,879 INFO L225 Difference]: With dead ends: 265 [2018-09-28 10:35:05,880 INFO L226 Difference]: Without dead ends: 263 [2018-09-28 10:35:05,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:35:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-28 10:35:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-28 10:35:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-28 10:35:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-28 10:35:05,884 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-09-28 10:35:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:35:05,884 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-28 10:35:05,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-28 10:35:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-28 10:35:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-28 10:35:05,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:35:05,885 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-09-28 10:35:05,886 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:35:05,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:35:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-09-28 10:35:05,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:35:05,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:35:05,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:35:05,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:35:05,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:35:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:35:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:35:07,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:35:07,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:35:07,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:35:07,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-28 10:35:07,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:35:07,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:35:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:35:08,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:35:08,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-28 10:35:08,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-28 10:35:08,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-28 10:35:08,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:35:08,260 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-09-28 10:35:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:35:10,406 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-09-28 10:35:10,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-28 10:35:10,406 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-09-28 10:35:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:35:10,407 INFO L225 Difference]: With dead ends: 267 [2018-09-28 10:35:10,407 INFO L226 Difference]: Without dead ends: 265 [2018-09-28 10:35:10,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:35:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-28 10:35:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-28 10:35:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-28 10:35:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-09-28 10:35:10,410 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-09-28 10:35:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:35:10,410 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-09-28 10:35:10,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-28 10:35:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-09-28 10:35:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-28 10:35:10,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:35:10,411 INFO L375 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-09-28 10:35:10,412 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:35:10,412 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:35:10,412 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-09-28 10:35:10,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:35:10,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:35:10,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:35:10,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:35:10,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY Received shutdown request... [2018-09-28 10:35:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:35:10,691 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:313) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-09-28 10:35:10,695 INFO L168 Benchmark]: Toolchain (without parser) took 244697.66 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -467.3 MB). Peak memory consumption was 758.5 MB. Max. memory is 7.1 GB. [2018-09-28 10:35:10,697 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:35:10,697 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:35:10,697 INFO L168 Benchmark]: Boogie Preprocessor took 23.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:35:10,698 INFO L168 Benchmark]: RCFGBuilder took 286.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:35:10,698 INFO L168 Benchmark]: TraceAbstraction took 244338.80 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -488.4 MB). Peak memory consumption was 737.3 MB. Max. memory is 7.1 GB. [2018-09-28 10:35:10,701 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 286.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 244338.80 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -488.4 MB). Peak memory consumption was 737.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-35-10-711.csv Completed graceful shutdown