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 0.1.23-00a8621 [2018-09-30 10:49:41,812 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:49:41,814 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:49:41,826 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:49:41,827 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:49:41,827 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:49:41,829 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:49:41,830 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:49:41,832 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:49:41,833 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:49:41,836 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:49:41,862 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 [2018-09-30 10:49:41,877 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:49:41,877 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:49:41,878 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:49:41,878 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:49:41,880 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:49:41,880 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:49:41,881 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:49:41,881 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:49:41,881 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:49:41,881 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:49:41,882 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:49:41,882 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:49:41,882 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:49:41,882 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:49:41,882 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:49:41,883 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:49:41,883 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:49:41,883 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:49:41,883 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:49:41,884 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:49:41,884 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:49:41,884 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:49:41,884 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:49:41,884 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:49:41,884 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:49:41,885 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:49:41,885 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:49:41,885 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:49:41,885 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:49:41,885 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:49:41,886 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:49:41,943 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:49:41,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:49:41,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:49:41,961 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:49:41,962 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:49:41,963 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl [2018-09-30 10:49:41,963 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl' [2018-09-30 10:49:42,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:49:42,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:49:42,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:49:42,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:49:42,018 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:49:42,038 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,050 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:49:42,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:49:42,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:49:42,059 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:49:42,071 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,071 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,072 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,072 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,075 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,077 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,078 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 30.09 10:49:42" (1/1) ... [2018-09-30 10:49:42,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:49:42,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:49:42,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:49:42,080 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:49:42,081 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 30.09 10:49:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:49:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:49:42,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:49:42,359 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:49:42,359 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:49:42 BoogieIcfgContainer [2018-09-30 10:49:42,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:49:42,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:49:42,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:49:42,364 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:49:42,364 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 30.09 10:49:42" (1/2) ... [2018-09-30 10:49:42,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a744951 and model type count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:49:42, skipping insertion in model container [2018-09-30 10:49:42,367 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 30.09 10:49:42" (2/2) ... [2018-09-30 10:49:42,370 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bpl [2018-09-30 10:49:42,381 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:49:42,391 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:49:42,449 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:49:42,450 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:49:42,451 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:49:42,451 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:49:42,451 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:49:42,451 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:49:42,451 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:49:42,452 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:49:42,452 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:49:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:49:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:49:42,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:42,475 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:49:42,477 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:42,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 10:49:42,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:42,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:42,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:42,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:42,653 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:49:42,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:49:42,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:49:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:49:42,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:42,675 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:49:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:42,827 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:49:42,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:49:42,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 10:49:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:42,841 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:49:42,841 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:49:42,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:49:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:49:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:49:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:49:42,888 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 10:49:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:42,888 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:49:42,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:49:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:49:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:49:42,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:42,890 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 10:49:42,890 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:42,890 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:42,890 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 10:49:42,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:42,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:42,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:42,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:43,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:43,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:43,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:43,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:43,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:43,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:49:43,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:49:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:49:43,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:43,309 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 10:49:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:43,387 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:49:43,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:49:43,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 10:49:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:43,389 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:49:43,389 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:49:43,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:49:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:49:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:49:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:49:43,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 10:49:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:43,393 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:49:43,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:49:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:49:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:49:43,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:43,394 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 10:49:43,395 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:43,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 10:49:43,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:43,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:43,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:43,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:43,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:43,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:43,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:43,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:43,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:43,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:43,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:43,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:43,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:49:43,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:49:43,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:49:43,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:43,578 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 10:49:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:43,860 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:49:43,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:49:43,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 10:49:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:43,862 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:49:43,863 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:49:43,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:49:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:49:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:49:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:49:43,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 10:49:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:43,869 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:49:43,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:49:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:49:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:49:43,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:43,871 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 10:49:43,872 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:43,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 10:49:43,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:43,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:43,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:43,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:43,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:43,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:43,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:44,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:44,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:49:44,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:44,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:44,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:49:44,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:49:44,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:49:44,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:44,132 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 10:49:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:44,280 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:49:44,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:49:44,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 10:49:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:44,284 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:49:44,285 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:49:44,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:49:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:49:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:49:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:49:44,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 10:49:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:44,290 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:49:44,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:49:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:49:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:49:44,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:44,291 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 10:49:44,291 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:44,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 10:49:44,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:44,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:44,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:44,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:44,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:44,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:44,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:44,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:44,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:49:44,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:49:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:49:44,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:44,673 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 10:49:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:44,765 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:49:44,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:49:44,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 10:49:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:44,766 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:49:44,766 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:49:44,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:49:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:49:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:49:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:49:44,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 10:49:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:44,771 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:49:44,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:49:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:49:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:49:44,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:44,773 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 10:49:44,773 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:44,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 10:49:44,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:44,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:44,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:44,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:44,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:44,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:44,913 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:44,937 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:49:44,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:44,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:45,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:45,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:49:45,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:49:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:49:45,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:45,371 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 10:49:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:45,563 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:49:45,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:49:45,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 10:49:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:45,567 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:49:45,568 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:49:45,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:49:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:49:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:49:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:49:45,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 10:49:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:45,573 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:49:45,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:49:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:49:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:49:45,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:45,574 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 10:49:45,574 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:45,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 10:49:45,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:45,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:45,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:45,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:45,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:45,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:45,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:45,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:49:45,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:45,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:45,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:45,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:49:45,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:49:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:49:45,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:45,805 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 10:49:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:45,947 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:49:45,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:49:45,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 10:49:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:45,951 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:49:45,951 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:49:45,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:49:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:49:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:49:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:49:45,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 10:49:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:45,957 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:49:45,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:49:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:49:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:49:45,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:45,958 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 10:49:45,958 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:45,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 10:49:45,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:45,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:45,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:45,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:46,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:46,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:46,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:49:46,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:49:46,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:49:46,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:46,226 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 10:49:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:46,295 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:49:46,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:49:46,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 10:49:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:46,299 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:49:46,299 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:49:46,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:49:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:49:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:49:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:49:46,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 10:49:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:46,305 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:49:46,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:49:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:49:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:49:46,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:46,306 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 10:49:46,306 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:46,306 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 10:49:46,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:46,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:46,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:46,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:46,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:46,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:46,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:46,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:46,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:46,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:46,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:49:46,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:49:46,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:49:46,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:46,590 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 10:49:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:46,738 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:49:46,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:49:46,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 10:49:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:46,744 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:49:46,744 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:49:46,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:49:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:49:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:49:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:49:46,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 10:49:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:46,749 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:49:46,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:49:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:49:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:49:46,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:46,751 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 10:49:46,751 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:46,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 10:49:46,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:46,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:46,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:46,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:46,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:46,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:46,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:46,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:49:46,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:46,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:47,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:47,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:49:47,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:49:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:49:47,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:47,010 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 10:49:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:47,151 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:49:47,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:49:47,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 10:49:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:47,153 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:49:47,153 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:49:47,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:49:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:49:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:49:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:49:47,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 10:49:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:47,159 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:49:47,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:49:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:49:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:49:47,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:47,160 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 10:49:47,160 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:47,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 10:49:47,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:47,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:47,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:47,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:47,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:47,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:47,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:47,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:47,416 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:47,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:47,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:47,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:47,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:49:47,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:49:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:49:47,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:47,532 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 10:49:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:47,656 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:49:47,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:49:47,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 10:49:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:47,657 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:49:47,658 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:49:47,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:49:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:49:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:49:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:49:47,663 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 10:49:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:47,664 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:49:47,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:49:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:49:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:49:47,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:47,665 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 10:49:47,665 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:47,665 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:47,666 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 10:49:47,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:47,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:47,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:47,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:47,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:47,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:47,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:48,001 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:48,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:49:48,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:48,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:48,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:48,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:49:48,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:49:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:49:48,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:48,145 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 10:49:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:48,388 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:49:48,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:49:48,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 10:49:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:48,391 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:49:48,391 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:49:48,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:49:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:49:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:49:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:49:48,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 10:49:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:48,396 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:49:48,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:49:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:49:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:49:48,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:48,397 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 10:49:48,398 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:48,398 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 10:49:48,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:48,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:48,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:48,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:48,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:48,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:48,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:48,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:48,745 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:49:48,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:48,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:48,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:48,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:49:48,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:49:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:49:48,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:48,910 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 10:49:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:49,052 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:49:49,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:49:49,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 10:49:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:49,055 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:49:49,055 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:49:49,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:49:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:49:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:49:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:49:49,061 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 10:49:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:49,061 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:49:49,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:49:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:49:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:49:49,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:49,062 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 10:49:49,062 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:49,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 10:49:49,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:49,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:49,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:49,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:49,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:49,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:49,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:49,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:49,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:49:49,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:49:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:49:49,455 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:49,456 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 10:49:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:49,757 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:49:49,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:49:49,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 10:49:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:49,758 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:49:49,759 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:49:49,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:49:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:49:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:49:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:49:49,764 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 10:49:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:49,764 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:49:49,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:49:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:49:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:49:49,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:49,765 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 10:49:49,765 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:49,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 10:49:49,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:49,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:49,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:49,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:49,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:49,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:49,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:49,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:49,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:49,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:50,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:50,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:49:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:49:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:49:50,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:50,350 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 10:49:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:50,525 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:49:50,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:49:50,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 10:49:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:50,527 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:49:50,527 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:49:50,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:49:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:49:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:49:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:49:50,533 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 10:49:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:50,533 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:49:50,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:49:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:49:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:49:50,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:50,534 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 10:49:50,535 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:50,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 10:49:50,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:50,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:50,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:50,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:50,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:50,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:50,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:50,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:50,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:49:50,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:50,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:51,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:51,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:49:51,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:49:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:49:51,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:51,021 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 10:49:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:51,171 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:49:51,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:49:51,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 10:49:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:51,173 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:49:51,173 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:49:51,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:49:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:49:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:49:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:49:51,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 10:49:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:51,179 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:49:51,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:49:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:49:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:49:51,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:51,180 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 10:49:51,180 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:51,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 10:49:51,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:51,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:51,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:51,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:51,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:51,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:51,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:51,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:51,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:51,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:51,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:52,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:49:52,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:49:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:49:52,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:52,186 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 10:49:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:52,469 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:49:52,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:49:52,470 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 10:49:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:52,471 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:49:52,471 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:49:52,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:49:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:49:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:49:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:49:52,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 10:49:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:52,477 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:49:52,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:49:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:49:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:49:52,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:52,478 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 10:49:52,479 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:52,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:52,479 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 10:49:52,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:52,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:52,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:52,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:52,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:52,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:52,745 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:52,785 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:49:52,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:52,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:52,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:49:52,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:49:52,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:49:52,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:52,998 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 10:49:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:53,146 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:49:53,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:49:53,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 10:49:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:53,147 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:49:53,148 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:49:53,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:49:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:49:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:49:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:49:53,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 10:49:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:53,155 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:49:53,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:49:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:49:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:49:53,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:53,156 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 10:49:53,156 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:53,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 10:49:53,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:53,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:53,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:53,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:53,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:53,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:53,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:53,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:53,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:49:53,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:53,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:54,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:54,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:49:54,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:49:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:49:54,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:54,009 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 10:49:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:54,220 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:49:54,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:49:54,221 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 10:49:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:54,221 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:49:54,222 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:49:54,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:49:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:49:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:49:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:49:54,227 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 10:49:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:54,228 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:49:54,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:49:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:49:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:49:54,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:54,229 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 10:49:54,229 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:54,229 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 10:49:54,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:54,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:54,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:54,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:54,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:54,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:54,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:54,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:55,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:55,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:55,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:49:55,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:49:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:49:55,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:55,303 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 10:49:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:55,521 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:49:55,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:49:55,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 10:49:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:55,522 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:49:55,522 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:49:55,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:49:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:49:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:49:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:49:55,528 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 10:49:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:55,528 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:49:55,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:49:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:49:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:49:55,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:55,529 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 10:49:55,530 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:55,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:55,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 10:49:55,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:55,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:55,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:55,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:55,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:55,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:55,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:55,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:55,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:55,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:55,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:55,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:55,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:49:55,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:49:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:49:55,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:55,958 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 10:49:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:56,115 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:49:56,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:49:56,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 10:49:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:56,117 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:49:56,117 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:49:56,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:49:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:49:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:49:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:49:56,123 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 10:49:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:56,123 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:49:56,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:49:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:49:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:49:56,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:56,125 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 10:49:56,125 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:56,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 10:49:56,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:56,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:56,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:56,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:56,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:56,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:56,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:56,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:56,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:49:56,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:56,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:56,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:56,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:49:56,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:49:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:49:56,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:56,732 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 10:49:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:56,960 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:49:56,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:49:56,961 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 10:49:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:56,962 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:49:56,962 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:49:56,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:49:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:49:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:49:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:49:56,967 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 10:49:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:56,967 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:49:56,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:49:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:49:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:49:56,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:56,968 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 10:49:56,968 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:56,968 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 10:49:56,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:56,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:56,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:57,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:57,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:57,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:57,243 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:57,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:57,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:57,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:57,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:49:57,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:49:57,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:49:57,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:57,446 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 10:49:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:57,858 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:49:57,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:49:57,859 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 10:49:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:57,859 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:49:57,859 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:49:57,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:49:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:49:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:49:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:49:57,865 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 10:49:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:57,865 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:49:57,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:49:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:49:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:49:57,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:57,866 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 10:49:57,866 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:57,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:57,866 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 10:49:57,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:57,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:57,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:57,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:57,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:58,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:58,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:58,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:58,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:49:58,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:58,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:58,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:58,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:49:58,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:49:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:49:58,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:58,408 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 10:49:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:58,789 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:49:58,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:49:58,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 10:49:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:58,791 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:49:58,791 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:49:58,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:49:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:49:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:49:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:49:58,796 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 10:49:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:58,797 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:49:58,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:49:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:49:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:49:58,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:58,798 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 10:49:58,798 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:58,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:58,798 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 10:49:58,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:58,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:58,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:58,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:58,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:59,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:59,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:59,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:59,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:49:59,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:59,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:59,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:59,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:49:59,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:49:59,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:49:59,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:59,392 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 10:49:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:59,568 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:49:59,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:49:59,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 10:49:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:59,569 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:49:59,570 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:49:59,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:49:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:49:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:49:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:49:59,575 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 10:49:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:59,575 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:49:59,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:49:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:49:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:49:59,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:59,576 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 10:49:59,577 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:59,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 10:49:59,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:59,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:59,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:59,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:59,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:00,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:00,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:00,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:00,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:00,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:00,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:50:00,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:50:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:50:00,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:00,241 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 10:50:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:00,423 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:50:00,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:50:00,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 10:50:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:00,424 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:50:00,424 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:50:00,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:50:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:50:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:50:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:50:00,428 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 10:50:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:00,428 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:50:00,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:50:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:50:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:50:00,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:00,429 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 10:50:00,429 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:00,429 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 10:50:00,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:00,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:00,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:00,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:00,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:01,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:01,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:01,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:01,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:01,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:01,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:01,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:01,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:50:01,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:50:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:50:01,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:01,561 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 10:50:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:01,756 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:50:01,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:50:01,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 10:50:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:01,758 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:50:01,758 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:50:01,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:50:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:50:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:50:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:50:01,762 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 10:50:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:01,763 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:50:01,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:50:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:50:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:50:01,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:01,763 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 10:50:01,764 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:01,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 10:50:01,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:01,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:01,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:02,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:02,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:02,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:02,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:50:02,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:02,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:02,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:02,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:50:02,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:50:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:50:02,568 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:02,568 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 10:50:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:03,088 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:50:03,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:50:03,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 10:50:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:03,090 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:50:03,090 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:50:03,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:50:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:50:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:50:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:50:03,093 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 10:50:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:03,094 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:50:03,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:50:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:50:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:50:03,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:03,095 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 10:50:03,095 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:03,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 10:50:03,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:03,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:03,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:03,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:03,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:03,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:03,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:03,368 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:03,421 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:03,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:03,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:03,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:03,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:50:03,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:50:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:50:03,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:03,592 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 10:50:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:03,873 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:50:03,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:50:03,873 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 10:50:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:03,874 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:50:03,874 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:50:03,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:50:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:50:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:50:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:50:03,878 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 10:50:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:03,879 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:50:03,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:50:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:50:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:50:03,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:03,879 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 10:50:03,880 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:03,880 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:03,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 10:50:03,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:03,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:03,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:03,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:03,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:04,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:04,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:04,129 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:04,337 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:50:04,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:04,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:04,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:04,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:50:04,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:50:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:50:04,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:04,478 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 10:50:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:04,633 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:50:04,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:50:04,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 10:50:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:04,634 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:50:04,634 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:50:04,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:50:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:50:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:50:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:50:04,637 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 10:50:04,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:04,637 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:50:04,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:50:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:50:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:50:04,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:04,638 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 10:50:04,638 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:04,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 10:50:04,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:04,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:04,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:04,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:04,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:04,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:04,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:05,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:50:05,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:05,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:05,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:05,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:50:05,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:50:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:50:05,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:05,170 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 10:50:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:05,295 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:50:05,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:50:05,295 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 10:50:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:05,296 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:50:05,296 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:50:05,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:50:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:50:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:50:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:50:05,301 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 10:50:05,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:05,301 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:50:05,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:50:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:50:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:50:05,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:05,302 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 10:50:05,302 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:05,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 10:50:05,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:05,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:05,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:05,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:05,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:06,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:06,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:06,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:06,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:06,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:06,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:50:06,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:50:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:50:06,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:06,365 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 10:50:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:06,576 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:50:06,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:50:06,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 10:50:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:06,577 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:50:06,577 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:50:06,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:50:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:50:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:50:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:50:06,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 10:50:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:06,581 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:50:06,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:50:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:50:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:50:06,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:06,581 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 10:50:06,582 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:06,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 10:50:06,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:06,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:06,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:06,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:06,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:07,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:07,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:07,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:08,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:08,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:08,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:08,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:50:08,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:50:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:50:08,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:08,151 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 10:50:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:08,377 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:50:08,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:50:08,378 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 10:50:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:08,379 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:50:08,379 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:50:08,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:50:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:50:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:50:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:50:08,382 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 10:50:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:08,382 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:50:08,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:50:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:50:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:50:08,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:08,383 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 10:50:08,383 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:08,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 10:50:08,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:08,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:08,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:08,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:08,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:08,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:08,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:08,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:50:08,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:08,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:09,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:09,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:50:09,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:50:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:50:09,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:09,041 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 10:50:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:09,230 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:50:09,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:50:09,231 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 10:50:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:09,231 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:50:09,232 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:50:09,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:50:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:50:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:50:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:50:09,235 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 10:50:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:09,236 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:50:09,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:50:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:50:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:50:09,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:09,237 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 10:50:09,237 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:09,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 10:50:09,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:09,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:09,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:09,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:09,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:09,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:09,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:09,683 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:09,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:09,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:09,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:09,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:09,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:50:09,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:50:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:50:09,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:09,926 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 10:50:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:10,229 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:50:10,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:50:10,229 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 10:50:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:10,230 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:50:10,230 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:50:10,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:50:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:50:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:50:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:50:10,235 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 10:50:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:10,236 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:50:10,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:50:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:50:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:50:10,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:10,237 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 10:50:10,237 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:10,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 10:50:10,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:10,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:10,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:10,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:10,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:10,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:10,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:10,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:10,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:50:10,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:10,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:11,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:11,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:50:11,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:50:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:50:11,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:11,248 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 10:50:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:11,471 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:50:11,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:50:11,471 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 10:50:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:11,472 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:50:11,472 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:50:11,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:50:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:50:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:50:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:50:11,474 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 10:50:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:11,475 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:50:11,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:50:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:50:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:50:11,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:11,475 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 10:50:11,476 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:11,476 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 10:50:11,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:11,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:11,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:11,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:11,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:11,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:11,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:11,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:11,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:50:11,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:11,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:11,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:11,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:50:11,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:50:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:50:11,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:11,974 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 10:50:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:12,224 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:50:12,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:50:12,224 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 10:50:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:12,225 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:50:12,225 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:50:12,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:50:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:50:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:50:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:50:12,228 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 10:50:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:12,228 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:50:12,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:50:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:50:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:50:12,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:12,229 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 10:50:12,229 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:12,229 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 10:50:12,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:12,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:12,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:12,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:12,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:12,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:12,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:12,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:12,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:13,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:13,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:50:13,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:50:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:50:13,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:13,064 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 10:50:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:13,411 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:50:13,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:50:13,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 10:50:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:13,413 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:50:13,413 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:50:13,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:50:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:50:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:50:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:50:13,416 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 10:50:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:13,417 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:50:13,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:50:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:50:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:50:13,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:13,418 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 10:50:13,418 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:13,418 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 10:50:13,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:13,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:13,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:13,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:13,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:13,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:13,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:13,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:13,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:13,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:13,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:14,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:14,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:50:14,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:50:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:50:14,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:14,071 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 10:50:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:14,342 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:50:14,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:50:14,342 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 10:50:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:14,343 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:50:14,343 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:50:14,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:50:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:50:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:50:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:50:14,347 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 10:50:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:14,347 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:50:14,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:50:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:50:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:50:14,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:14,348 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 10:50:14,348 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:14,348 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 10:50:14,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:14,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:14,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:14,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:14,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:14,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:14,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:14,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:14,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 10:50:14,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:14,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:14,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:14,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:50:14,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:50:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:50:14,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:14,897 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 10:50:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:15,128 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:50:15,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:50:15,130 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 10:50:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:15,130 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:50:15,130 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:50:15,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:50:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:50:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:50:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:50:15,133 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 10:50:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:15,134 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:50:15,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:50:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:50:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:50:15,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:15,135 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 10:50:15,135 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:15,135 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 10:50:15,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:15,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:15,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:15,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:15,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:15,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:15,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:15,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:15,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:15,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:15,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:16,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:16,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:50:16,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:50:16,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:50:16,060 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:16,060 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 10:50:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:16,566 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:50:16,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:50:16,566 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 10:50:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:16,567 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:50:16,567 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:50:16,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:50:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:50:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:50:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:50:16,571 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 10:50:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:16,571 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:50:16,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:50:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:50:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:50:16,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:16,572 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 10:50:16,572 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:16,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 10:50:16,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:16,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:16,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:16,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:16,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:17,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:17,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:17,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:17,227 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 10:50:17,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:17,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:17,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:17,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:50:17,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:50:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:50:17,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:17,446 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 10:50:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:17,786 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:50:17,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:50:17,787 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 10:50:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:17,787 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:50:17,787 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:50:17,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:50:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:50:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:50:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:50:17,790 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 10:50:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:17,791 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:50:17,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:50:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:50:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:50:17,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:17,791 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 10:50:17,792 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:17,792 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 10:50:17,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:17,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:17,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:17,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:17,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:18,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:18,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:18,451 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:18,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:50:18,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:18,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:18,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:18,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:50:18,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:50:18,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:50:18,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:18,757 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 10:50:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:18,953 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:50:18,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:50:18,954 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 10:50:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:18,955 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:50:18,955 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:50:18,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:50:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:50:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:50:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:50:18,958 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 10:50:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:18,958 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:50:18,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:50:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:50:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:50:18,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:18,959 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 10:50:18,959 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:18,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 10:50:18,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:18,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:18,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:19,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:19,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:19,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:19,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:50:19,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:50:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:50:19,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:19,659 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 10:50:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:19,965 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:50:19,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:50:19,965 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 10:50:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:19,966 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:50:19,966 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:50:19,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:50:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:50:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:50:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:50:19,969 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 10:50:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:19,969 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:50:19,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:50:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:50:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:50:19,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:19,969 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 10:50:19,970 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:19,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 10:50:19,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:19,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:19,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:19,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:19,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:21,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:21,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:21,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:22,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:22,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:22,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:22,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:22,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:50:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:50:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:50:22,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:22,462 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 10:50:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:23,017 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:50:23,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:50:23,017 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 10:50:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:23,018 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:50:23,018 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:50:23,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:50:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:50:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:50:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:50:23,023 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 10:50:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:23,024 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:50:23,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:50:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:50:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:50:23,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:23,024 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 10:50:23,024 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:23,025 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 10:50:23,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:23,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:23,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:23,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:23,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:24,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:24,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:24,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:24,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 10:50:24,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:24,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:24,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:24,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:50:24,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:50:24,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:50:24,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:24,663 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 10:50:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:24,932 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:50:24,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:50:24,932 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 10:50:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:24,933 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:50:24,933 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:50:24,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:24,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:50:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:50:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:50:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:50:24,936 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 10:50:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:24,936 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:50:24,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:50:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:50:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:50:24,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:24,937 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 10:50:24,937 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:24,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:24,937 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 10:50:24,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:24,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:24,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:24,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:24,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:25,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:25,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:25,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:25,704 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:25,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:25,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:27,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:27,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:50:27,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:50:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:50:27,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:27,092 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 10:50:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:27,428 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:50:27,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:50:27,428 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 10:50:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:27,429 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:50:27,429 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:50:27,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:50:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:50:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:50:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:50:27,432 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 10:50:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:27,432 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:50:27,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:50:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:50:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:50:27,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:27,433 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 10:50:27,433 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:27,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 10:50:27,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:27,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:27,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:27,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:27,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:27,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:27,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:27,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:27,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 10:50:27,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:27,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:28,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:28,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:50:28,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:50:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:50:28,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:28,178 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 10:50:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:28,520 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:50:28,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:50:28,521 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 10:50:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:28,522 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:50:28,522 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:50:28,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:50:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:50:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:50:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:50:28,526 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 10:50:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:28,527 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:50:28,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:50:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:50:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:50:28,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:28,528 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 10:50:28,528 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:28,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 10:50:28,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:28,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:28,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:28,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:28,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:28,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:28,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:28,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:28,969 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:50:28,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:28,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:29,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:29,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:50:29,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:50:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:50:29,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:29,174 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 10:50:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:29,525 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:50:29,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:50:29,526 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 10:50:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:29,527 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:50:29,527 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:50:29,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:50:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:50:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:50:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:50:29,531 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 10:50:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:29,531 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:50:29,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:50:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:50:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:50:29,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:29,532 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 10:50:29,532 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:29,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:29,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 10:50:29,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:29,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:29,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:29,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:29,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:29,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:29,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:29,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:30,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:30,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:30,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:50:30,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:50:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:50:30,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:30,237 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 10:50:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:30,571 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:50:30,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:50:30,571 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 10:50:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:30,572 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:50:30,572 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:50:30,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:50:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:50:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:50:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:50:30,575 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 10:50:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:30,575 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:50:30,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:50:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:50:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:50:30,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:30,576 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 10:50:30,577 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:30,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:30,577 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 10:50:30,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:30,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:30,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:30,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:30,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:30,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:30,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:30,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:30,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:30,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:30,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:31,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:31,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:50:31,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:50:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:50:31,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:31,333 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 10:50:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:31,825 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:50:31,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:50:31,826 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 10:50:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:31,827 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:50:31,827 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:50:31,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:31,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:50:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:50:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:50:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:50:31,830 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 10:50:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:31,831 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:50:31,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:50:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:50:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:50:31,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:31,832 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 10:50:31,832 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:31,832 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 10:50:31,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:31,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:31,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:31,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:31,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:32,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:32,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:32,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:32,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 10:50:32,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:32,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:32,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:32,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:50:32,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:50:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:50:32,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:32,729 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 10:50:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:33,141 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:50:33,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:50:33,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 10:50:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:33,142 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:50:33,142 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:50:33,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:50:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:50:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:50:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:50:33,146 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 10:50:33,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:33,146 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:50:33,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:50:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:50:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:50:33,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:33,147 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 10:50:33,147 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:33,148 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 10:50:33,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:33,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:33,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:33,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:33,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:33,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:33,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:33,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:34,018 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:34,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:34,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:34,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:34,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:50:34,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:50:34,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:50:34,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:34,247 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 10:50:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:34,665 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:50:34,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:50:34,665 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 10:50:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:34,666 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:50:34,666 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:50:34,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:50:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:50:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:50:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:50:34,669 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 10:50:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:34,669 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:50:34,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:50:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:50:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:50:34,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:34,670 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 10:50:34,670 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:34,670 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 10:50:34,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:34,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:34,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:34,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:34,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:35,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:35,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:35,306 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:35,494 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 10:50:35,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:35,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:35,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:35,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:50:35,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:50:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:50:35,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:35,836 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 10:50:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:36,113 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:50:36,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:50:36,114 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 10:50:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:36,114 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:50:36,114 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:50:36,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:50:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:50:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:50:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 10:50:36,119 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 10:50:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:36,119 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 10:50:36,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:50:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 10:50:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:50:36,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:36,120 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 10:50:36,120 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:36,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 10:50:36,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:36,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:36,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:36,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:36,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:36,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:36,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:36,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:36,682 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:50:36,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:36,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:37,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:37,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:50:37,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:50:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:50:37,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:37,032 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 10:50:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:37,775 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:50:37,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:50:37,775 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 10:50:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:37,776 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:50:37,776 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:50:37,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:50:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:50:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:50:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 10:50:37,779 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 10:50:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:37,779 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 10:50:37,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:50:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 10:50:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:50:37,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:37,780 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 10:50:37,780 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:37,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 10:50:37,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:37,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:37,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:37,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:37,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:38,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:38,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:38,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:38,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:38,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:38,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:50:38,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:50:38,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:50:38,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:38,886 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 10:50:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:39,456 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:50:39,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:50:39,456 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 10:50:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:39,458 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:50:39,458 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:50:39,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:50:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:50:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:50:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 10:50:39,462 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 10:50:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:39,463 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 10:50:39,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:50:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 10:50:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:50:39,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:39,464 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 10:50:39,464 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:39,464 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 10:50:39,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:39,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:39,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:39,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:39,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:39,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:39,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:39,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:39,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:39,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:39,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:41,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:41,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:50:41,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:50:41,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:50:41,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:41,362 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 10:50:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:41,929 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:50:41,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:50:41,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 10:50:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:41,930 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:50:41,930 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:50:41,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:50:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:50:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:50:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 10:50:41,933 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 10:50:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:41,933 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 10:50:41,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:50:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 10:50:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:50:41,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:41,934 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 10:50:41,934 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:41,934 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 10:50:41,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:41,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:41,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:41,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:41,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:42,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:42,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:42,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:42,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 10:50:42,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:42,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:42,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:42,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:50:42,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:50:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:50:42,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:42,672 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 10:50:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:42,985 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:50:42,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:50:42,985 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 10:50:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:42,986 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:50:42,986 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:50:42,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:50:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:50:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:50:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 10:50:42,989 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 10:50:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:42,989 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 10:50:42,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:50:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 10:50:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:50:42,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:42,990 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 10:50:42,991 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:42,991 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 10:50:42,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:42,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:42,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:42,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:42,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:43,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:43,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:43,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:43,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:43,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:43,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:43,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:43,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:50:43,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:50:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:50:43,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:43,944 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 10:50:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:44,484 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:50:44,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:50:44,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 10:50:44,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:44,485 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:50:44,485 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:50:44,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:50:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:50:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:50:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 10:50:44,488 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 10:50:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:44,488 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 10:50:44,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:50:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 10:50:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:50:44,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:44,490 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 10:50:44,490 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:44,490 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 10:50:44,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:44,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:44,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:44,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:44,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:44,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:44,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:44,877 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:45,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 10:50:45,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:45,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:45,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:45,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:50:45,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:50:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:50:45,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:45,417 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 10:50:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:45,889 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:50:45,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:50:45,890 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 10:50:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:45,890 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:50:45,891 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:50:45,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:50:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:50:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:50:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 10:50:45,893 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 10:50:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:45,894 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 10:50:45,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:50:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 10:50:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:50:45,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:45,894 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 10:50:45,895 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:45,895 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 10:50:45,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:45,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:45,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:45,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:45,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:46,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:46,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:46,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:46,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:50:46,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:46,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:46,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:46,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:50:46,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:50:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:50:46,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:46,826 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 10:50:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:47,353 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:50:47,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:50:47,353 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 10:50:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:47,354 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:50:47,354 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:50:47,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:50:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:50:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:50:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 10:50:47,357 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 10:50:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:47,358 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 10:50:47,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:50:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 10:50:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 10:50:47,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:47,359 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 10:50:47,359 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:47,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 10:50:47,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:47,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:47,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:47,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:47,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:47,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:47,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:48,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:48,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:50:48,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:50:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:50:48,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:48,231 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 10:50:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:48,822 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:50:48,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:50:48,823 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 10:50:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:48,824 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:50:48,824 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 10:50:48,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 10:50:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 10:50:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:50:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 10:50:48,826 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 10:50:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:48,827 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 10:50:48,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:50:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 10:50:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:50:48,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:48,827 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 10:50:48,828 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:48,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 10:50:48,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:48,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:48,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:48,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:48,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:49,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:49,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:49,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:49,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:49,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:49,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:49,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:49,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:50:49,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:50:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:50:49,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:49,846 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 10:50:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:50,264 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:50:50,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:50:50,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 10:50:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:50,265 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:50:50,265 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:50:50,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:50:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:50:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:50:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 10:50:50,267 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 10:50:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:50,268 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 10:50:50,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:50:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 10:50:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:50:50,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:50,268 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 10:50:50,269 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:50,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 10:50:50,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:50,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:50,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:50,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:50,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:50,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:50,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:50,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:50,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 10:50:50,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:50,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:51,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:51,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:50:51,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:50:51,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:50:51,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:51,053 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 10:50:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:51,539 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:50:51,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:50:51,539 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 10:50:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:51,540 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:50:51,540 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:50:51,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:50:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:50:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:50:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 10:50:51,543 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 10:50:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:51,543 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 10:50:51,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:50:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 10:50:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:50:51,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:51,544 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 10:50:51,544 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:51,545 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 10:50:51,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:51,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:51,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:51,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:51,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:51,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:51,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:51,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:52,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:52,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:52,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:52,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:52,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:50:52,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:50:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:50:52,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:52,351 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 10:50:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:52,918 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:50:52,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:50:52,918 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 10:50:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:52,919 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:50:52,919 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:50:52,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:50:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 10:50:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 10:50:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 10:50:52,922 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 10:50:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:52,923 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 10:50:52,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:50:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 10:50:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:50:52,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:52,924 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 10:50:52,924 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:52,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 10:50:52,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:52,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:53,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:53,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:53,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:53,604 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 10:50:53,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:53,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:53,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:53,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:50:53,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:50:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:50:53,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:53,962 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 10:50:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:54,563 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:50:54,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:50:54,564 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 10:50:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:54,564 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:50:54,565 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:50:54,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:50:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:50:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:50:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 10:50:54,568 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 10:50:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:54,569 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 10:50:54,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:50:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 10:50:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:50:54,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:54,570 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 10:50:54,570 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:54,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 10:50:54,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:54,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:54,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:54,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:54,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:55,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:55,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:55,044 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:55,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:50:55,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:55,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:55,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:55,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:50:55,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:50:55,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:50:55,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:55,485 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 10:50:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:56,032 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:50:56,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:50:56,032 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 10:50:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:56,033 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:50:56,033 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:50:56,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:50:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:50:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:50:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 10:50:56,036 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 10:50:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:56,036 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 10:50:56,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:50:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 10:50:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:50:56,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:56,037 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 10:50:56,037 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:56,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 10:50:56,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:56,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:56,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:56,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:56,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:56,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:56,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:56,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:56,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:57,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:57,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:50:57,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:50:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:50:57,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:57,103 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 10:50:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:57,744 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:50:57,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:50:57,745 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 10:50:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:57,745 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:50:57,745 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:50:57,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:50:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:50:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:50:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 10:50:57,749 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 10:50:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:57,750 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 10:50:57,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:50:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 10:50:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:50:57,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:57,751 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 10:50:57,751 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:57,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:57,751 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 10:50:57,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:57,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:57,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:57,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:57,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:58,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:58,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:58,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:58,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:58,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:58,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:58,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:58,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:50:58,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:50:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:50:58,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:58,699 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 10:50:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:59,492 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 10:50:59,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:50:59,492 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 10:50:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:59,493 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:50:59,493 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:50:59,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:50:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 10:50:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 10:50:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 10:50:59,496 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 10:50:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:59,496 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 10:50:59,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:50:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 10:50:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 10:50:59,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:59,497 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 10:50:59,497 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:59,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 10:50:59,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:59,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:59,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:59,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:59,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:59,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:59,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:59,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:00,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 10:51:00,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:00,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:00,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:00,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:51:00,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:51:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:51:00,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:00,431 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 10:51:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:01,148 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 10:51:01,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:51:01,151 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 10:51:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:01,152 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:51:01,152 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 10:51:01,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 10:51:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 10:51:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:51:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 10:51:01,156 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 10:51:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:01,156 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 10:51:01,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:51:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 10:51:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 10:51:01,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:01,157 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 10:51:01,157 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:01,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 10:51:01,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:01,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:01,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:01,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:01,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:01,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:01,705 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:01,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:01,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:01,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:02,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:02,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:51:02,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:51:02,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:51:02,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:02,084 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 10:51:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:02,788 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 10:51:02,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:51:02,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 10:51:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:02,789 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:51:02,789 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:51:02,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:51:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 10:51:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 10:51:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 10:51:02,793 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 10:51:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:02,793 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 10:51:02,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:51:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 10:51:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:51:02,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:02,794 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 10:51:02,794 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:02,794 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:02,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 10:51:02,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:02,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:02,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:02,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:02,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:03,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:03,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:03,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:03,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 10:51:03,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:03,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:03,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:03,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:51:03,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:51:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:51:03,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:03,766 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 10:51:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:04,565 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 10:51:04,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:51:04,566 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 10:51:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:04,567 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:51:04,567 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:51:04,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:51:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:51:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:51:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 10:51:04,570 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 10:51:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:04,571 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 10:51:04,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:51:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 10:51:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 10:51:04,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:04,572 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 10:51:04,572 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:04,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 10:51:04,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:04,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:04,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:04,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:04,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:05,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:05,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:05,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:05,244 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 10:51:05,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:05,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:05,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:05,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:51:05,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:51:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:51:05,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:05,566 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 10:51:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:06,102 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 10:51:06,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:51:06,102 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 10:51:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:06,103 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:51:06,103 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 10:51:06,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 10:51:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 10:51:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 10:51:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 10:51:06,107 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 10:51:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:06,108 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 10:51:06,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:51:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 10:51:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 10:51:06,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:06,109 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 10:51:06,109 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:06,109 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 10:51:06,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:06,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:06,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:06,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:06,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:06,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:06,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:06,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:06,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:07,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:07,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:51:07,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:51:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:51:07,036 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:07,036 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 10:51:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:07,772 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 10:51:07,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:51:07,773 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 10:51:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:07,773 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:51:07,773 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 10:51:07,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 10:51:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 10:51:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 10:51:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 10:51:07,776 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 10:51:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:07,776 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 10:51:07,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:51:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 10:51:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:51:07,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:07,777 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 10:51:07,777 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:07,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:07,778 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 10:51:07,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:07,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:07,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:07,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:07,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:08,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:08,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:08,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:08,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:08,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:08,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:08,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:08,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:51:08,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:51:08,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:51:08,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:08,707 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 10:51:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:09,382 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 10:51:09,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:51:09,382 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 10:51:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:09,383 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:51:09,383 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:51:09,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:51:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 10:51:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 10:51:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 10:51:09,386 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 10:51:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:09,386 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 10:51:09,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:51:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 10:51:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 10:51:09,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:09,387 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 10:51:09,387 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:09,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 10:51:09,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:09,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:09,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:09,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:09,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:09,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:09,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:09,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:10,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 10:51:10,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:10,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:10,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:10,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:51:10,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:51:10,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:51:10,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:10,439 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 10:51:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:10,996 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 10:51:10,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:51:10,996 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 10:51:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:10,997 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:51:10,997 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 10:51:10,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 10:51:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 10:51:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 10:51:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 10:51:11,000 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 10:51:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:11,000 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 10:51:11,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:51:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 10:51:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 10:51:11,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:11,001 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 10:51:11,001 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:11,001 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 10:51:11,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:11,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:11,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:11,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:11,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:11,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:11,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:11,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:11,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:11,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:11,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:51:11,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:51:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:51:11,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:11,909 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 10:51:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:12,818 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 10:51:12,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:51:12,818 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 10:51:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:12,819 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:51:12,819 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 10:51:12,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 10:51:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 10:51:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 10:51:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 10:51:12,823 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 10:51:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:12,823 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 10:51:12,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:51:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 10:51:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 10:51:12,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:12,824 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 10:51:12,824 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:12,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:12,824 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 10:51:12,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:12,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:12,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:12,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:13,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:13,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:13,329 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:13,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 10:51:13,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:13,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:13,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:13,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:51:13,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:51:13,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:51:13,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:13,828 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 10:51:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:14,734 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 10:51:14,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:51:14,735 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 10:51:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:14,735 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:51:14,735 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 10:51:14,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 10:51:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 10:51:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 10:51:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 10:51:14,739 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 10:51:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:14,739 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 10:51:14,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:51:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 10:51:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 10:51:14,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:14,740 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 10:51:14,741 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:14,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 10:51:14,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:14,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:14,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:14,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:15,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:15,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:15,283 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:15,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 10:51:15,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:15,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:15,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:15,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:51:15,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:51:15,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:51:15,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:15,799 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 10:51:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:16,445 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 10:51:16,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:51:16,446 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 10:51:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:16,447 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:51:16,447 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 10:51:16,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 10:51:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 10:51:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 10:51:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 10:51:16,450 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 10:51:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:16,451 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 10:51:16,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:51:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 10:51:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 10:51:16,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:16,452 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 10:51:16,452 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:16,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 10:51:16,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:16,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:16,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:16,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:16,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:16,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:17,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:17,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:17,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:17,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:51:17,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:51:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:51:17,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:17,482 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 10:51:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:18,217 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 10:51:18,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:51:18,217 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 10:51:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:18,218 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:51:18,218 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 10:51:18,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 10:51:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 10:51:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 10:51:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 10:51:18,221 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 10:51:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:18,221 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 10:51:18,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:51:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 10:51:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:51:18,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:18,223 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 10:51:18,223 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:18,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 10:51:18,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:18,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:18,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:18,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:18,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:18,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:18,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:18,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:18,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:18,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:18,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:19,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:19,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:51:19,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:51:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:51:19,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:19,349 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 10:51:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:20,293 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 10:51:20,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:51:20,294 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 10:51:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:20,295 INFO L225 Difference]: With dead ends: 169 [2018-09-30 10:51:20,295 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 10:51:20,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 10:51:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 10:51:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 10:51:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 10:51:20,298 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 10:51:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:20,298 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 10:51:20,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:51:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 10:51:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 10:51:20,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:20,299 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 10:51:20,299 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:20,299 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 10:51:20,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:20,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:20,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:20,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:20,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:20,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:20,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:20,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:21,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 10:51:21,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:21,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:21,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:21,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:51:21,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:51:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:51:21,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:21,441 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 10:51:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:22,275 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 10:51:22,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:51:22,275 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 10:51:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:22,276 INFO L225 Difference]: With dead ends: 171 [2018-09-30 10:51:22,276 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 10:51:22,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 10:51:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 10:51:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 10:51:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 10:51:22,279 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 10:51:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:22,279 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 10:51:22,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:51:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 10:51:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 10:51:22,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:22,280 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 10:51:22,280 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:22,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 10:51:22,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:22,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:22,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:22,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:22,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:22,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:22,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:22,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:22,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:23,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:23,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:51:23,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:51:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:51:23,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:23,281 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 10:51:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:23,945 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 10:51:23,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:51:23,946 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 10:51:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:23,947 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:51:23,947 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 10:51:23,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 10:51:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 10:51:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 10:51:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 10:51:23,950 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 10:51:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:23,950 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 10:51:23,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:51:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 10:51:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:51:23,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:23,951 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 10:51:23,951 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:23,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 10:51:23,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:23,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:23,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:24,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:24,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:24,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:24,941 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 10:51:24,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:24,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:25,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:25,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:51:25,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:51:25,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:51:25,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:25,247 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 10:51:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:25,993 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 10:51:25,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:51:25,993 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 10:51:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:25,994 INFO L225 Difference]: With dead ends: 175 [2018-09-30 10:51:25,994 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:51:25,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:51:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 10:51:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 10:51:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 10:51:25,997 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 10:51:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:25,998 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 10:51:25,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:51:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 10:51:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 10:51:25,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:25,999 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 10:51:25,999 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:25,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:26,000 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 10:51:26,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:26,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:26,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:26,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:26,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:26,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:26,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:26,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 10:51:26,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:26,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:27,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:27,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:51:27,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:51:27,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:51:27,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:27,158 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 10:51:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:28,046 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 10:51:28,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:51:28,046 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 10:51:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:28,047 INFO L225 Difference]: With dead ends: 177 [2018-09-30 10:51:28,047 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 10:51:28,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 10:51:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 10:51:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 10:51:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 10:51:28,051 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 10:51:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:28,052 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 10:51:28,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:51:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 10:51:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 10:51:28,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:28,053 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 10:51:28,053 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:28,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 10:51:28,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:28,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:28,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:28,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:28,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:28,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:28,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:28,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:28,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:29,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:29,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:51:29,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:51:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:51:29,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:29,095 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 10:51:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:29,822 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 10:51:29,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:51:29,822 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 10:51:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:29,823 INFO L225 Difference]: With dead ends: 179 [2018-09-30 10:51:29,823 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 10:51:29,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 10:51:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 10:51:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 10:51:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 10:51:29,827 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 10:51:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:29,827 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 10:51:29,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:51:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 10:51:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 10:51:29,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:29,828 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 10:51:29,828 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:29,829 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 10:51:29,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:29,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:29,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:29,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:30,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:30,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:30,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:30,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:30,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:30,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:30,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:30,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:51:30,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:51:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:51:30,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:30,916 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 10:51:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:31,764 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 10:51:31,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:51:31,765 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 10:51:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:31,765 INFO L225 Difference]: With dead ends: 181 [2018-09-30 10:51:31,765 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 10:51:31,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 10:51:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 10:51:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 10:51:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 10:51:31,768 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 10:51:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:31,768 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 10:51:31,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:51:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 10:51:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 10:51:31,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:31,769 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 10:51:31,769 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:31,769 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 10:51:31,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:31,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:31,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:31,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:31,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:32,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:32,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:32,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:32,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 10:51:32,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:32,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:32,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:32,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:51:32,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:51:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:51:32,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:32,934 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 10:51:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:33,746 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 10:51:33,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:51:33,746 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 10:51:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:33,747 INFO L225 Difference]: With dead ends: 183 [2018-09-30 10:51:33,747 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 10:51:33,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 10:51:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 10:51:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:51:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 10:51:33,750 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 10:51:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:33,750 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 10:51:33,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:51:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 10:51:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 10:51:33,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:33,751 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 10:51:33,751 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:33,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 10:51:33,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:33,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:33,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:33,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:33,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:34,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:34,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:34,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:34,537 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:34,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:34,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:35,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:35,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:51:35,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:51:35,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:51:35,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:35,122 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 10:51:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:36,014 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 10:51:36,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:51:36,015 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 10:51:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:36,015 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:51:36,015 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 10:51:36,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 10:51:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 10:51:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 10:51:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 10:51:36,019 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 10:51:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:36,019 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 10:51:36,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:51:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 10:51:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 10:51:36,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:36,020 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 10:51:36,021 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:36,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 10:51:36,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:36,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:36,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:36,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:36,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:36,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:36,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:36,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:36,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 10:51:36,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:36,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:37,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:37,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:51:37,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:51:37,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:51:37,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:37,214 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 10:51:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:38,001 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 10:51:38,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:51:38,001 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 10:51:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:38,002 INFO L225 Difference]: With dead ends: 187 [2018-09-30 10:51:38,002 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 10:51:38,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 10:51:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 10:51:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 10:51:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 10:51:38,006 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 10:51:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:38,006 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 10:51:38,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:51:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 10:51:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 10:51:38,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:38,007 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 10:51:38,008 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:38,008 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:38,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 10:51:38,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:38,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:38,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:38,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:38,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:38,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:38,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:38,683 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:38,934 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 10:51:38,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:38,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:39,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:39,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:51:39,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:51:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:51:39,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:39,274 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 10:51:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:40,090 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 10:51:40,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:51:40,090 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 10:51:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:40,091 INFO L225 Difference]: With dead ends: 189 [2018-09-30 10:51:40,091 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 10:51:40,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 10:51:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 10:51:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 10:51:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 10:51:40,095 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 10:51:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:40,096 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 10:51:40,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:51:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 10:51:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 10:51:40,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:40,097 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 10:51:40,097 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:40,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 10:51:40,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:40,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:40,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:40,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:40,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:40,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:40,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:40,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:40,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:41,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:41,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:51:41,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:51:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:51:41,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:41,241 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 10:51:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:42,089 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 10:51:42,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:51:42,089 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 10:51:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:42,090 INFO L225 Difference]: With dead ends: 191 [2018-09-30 10:51:42,090 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 10:51:42,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 10:51:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 10:51:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 10:51:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 10:51:42,095 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 10:51:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:42,095 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 10:51:42,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:51:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 10:51:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:51:42,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:42,096 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 10:51:42,096 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:42,096 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 10:51:42,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:42,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:42,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:42,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:42,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:42,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:42,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:42,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:42,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:42,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:42,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:43,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:43,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:51:43,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:51:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:51:43,299 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:43,299 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 10:51:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:44,153 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 10:51:44,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:51:44,153 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 10:51:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:44,154 INFO L225 Difference]: With dead ends: 193 [2018-09-30 10:51:44,154 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 10:51:44,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 10:51:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 10:51:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 10:51:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 10:51:44,158 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 10:51:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:44,158 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 10:51:44,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:51:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 10:51:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 10:51:44,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:44,160 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 10:51:44,160 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:44,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 10:51:44,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:44,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:44,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:44,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:44,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:45,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:45,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:45,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:45,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 10:51:45,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:45,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:45,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:45,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:51:45,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:51:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:51:45,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:45,647 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 10:51:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:46,687 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 10:51:46,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:51:46,687 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 10:51:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:46,688 INFO L225 Difference]: With dead ends: 195 [2018-09-30 10:51:46,688 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 10:51:46,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 10:51:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 10:51:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:51:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 10:51:46,692 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 10:51:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:46,692 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 10:51:46,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:51:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 10:51:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 10:51:46,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:46,693 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 10:51:46,693 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:46,694 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 10:51:46,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:46,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:46,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:46,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:46,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:47,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:47,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:47,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:47,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:47,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:47,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:47,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:47,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:51:47,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:51:47,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:51:47,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:47,958 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 10:51:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:48,929 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 10:51:48,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:51:48,929 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 10:51:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:48,930 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:51:48,930 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 10:51:48,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 10:51:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 10:51:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 10:51:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 10:51:48,933 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 10:51:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:48,934 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 10:51:48,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:51:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 10:51:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 10:51:48,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:48,935 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 10:51:48,935 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:48,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:48,935 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 10:51:48,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:48,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:48,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:48,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:48,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:49,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:49,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:49,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:50,002 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 10:51:50,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:50,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:50,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:50,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:51:50,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:51:50,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:51:50,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:50,478 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 10:51:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:51,497 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 10:51:51,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:51:51,497 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 10:51:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:51,498 INFO L225 Difference]: With dead ends: 199 [2018-09-30 10:51:51,498 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 10:51:51,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 10:51:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 10:51:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 10:51:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 10:51:51,502 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 10:51:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:51,503 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 10:51:51,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:51:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 10:51:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 10:51:51,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:51,504 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 10:51:51,504 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:51,504 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 10:51:51,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:51,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:51,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:51,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:51,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:52,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:52,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:52,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:52,533 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 10:51:52,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:52,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:52,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:52,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:51:52,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:51:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:51:52,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:52,938 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 10:51:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:53,839 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 10:51:53,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:51:53,839 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 10:51:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:53,840 INFO L225 Difference]: With dead ends: 201 [2018-09-30 10:51:53,840 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 10:51:53,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 10:51:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 10:51:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 10:51:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 10:51:53,845 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 10:51:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:53,845 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 10:51:53,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:51:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 10:51:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 10:51:53,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:53,846 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 10:51:53,846 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:53,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 10:51:53,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:53,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:53,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:53,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:53,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:54,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:54,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:54,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:54,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:55,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:55,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:51:55,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:51:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:51:55,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:55,212 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 10:51:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:56,278 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 10:51:56,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:51:56,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 10:51:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:56,280 INFO L225 Difference]: With dead ends: 203 [2018-09-30 10:51:56,280 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 10:51:56,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 10:51:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 10:51:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 10:51:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 10:51:56,283 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 10:51:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:56,283 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 10:51:56,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:51:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 10:51:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:51:56,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:56,284 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 10:51:56,284 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:56,284 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 10:51:56,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:56,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:56,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:56,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:56,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:57,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:57,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:57,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:57,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:57,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:57,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:57,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:57,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:51:57,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:51:57,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:51:57,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:57,600 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 10:51:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:58,666 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 10:51:58,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:51:58,667 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 10:51:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:58,668 INFO L225 Difference]: With dead ends: 205 [2018-09-30 10:51:58,668 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 10:51:58,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 10:51:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 10:51:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 10:51:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 10:51:58,671 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 10:51:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:58,671 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 10:51:58,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:51:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 10:51:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 10:51:58,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:58,672 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 10:51:58,672 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:58,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 10:51:58,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:58,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:58,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:58,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:58,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:59,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:59,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:59,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:59,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 10:51:59,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:59,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:00,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:00,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:52:00,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:52:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:52:00,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:00,129 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-30 10:52:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:01,201 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 10:52:01,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:52:01,201 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 10:52:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:01,202 INFO L225 Difference]: With dead ends: 207 [2018-09-30 10:52:01,202 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 10:52:01,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 10:52:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 10:52:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 10:52:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-30 10:52:01,206 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-30 10:52:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:01,206 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-30 10:52:01,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:52:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-30 10:52:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 10:52:01,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:01,207 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-30 10:52:01,207 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:01,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:01,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-30 10:52:01,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:01,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:01,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:01,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:01,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:02,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:02,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:02,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:52:02,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:52:02,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:02,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:02,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:02,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:52:02,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:52:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:52:02,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:02,574 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-30 10:52:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:03,667 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 10:52:03,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:52:03,668 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-30 10:52:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:03,669 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:52:03,669 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 10:52:03,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 10:52:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 10:52:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 10:52:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 10:52:03,674 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-30 10:52:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:03,674 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 10:52:03,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:52:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 10:52:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 10:52:03,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:03,675 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 10:52:03,676 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:03,676 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-30 10:52:03,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:03,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:03,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:03,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:03,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:04,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:04,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:04,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:52:04,997 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 10:52:04,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:05,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:05,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:05,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:52:05,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:52:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:52:05,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:05,546 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-30 10:52:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:06,931 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 10:52:06,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:52:06,932 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 10:52:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:06,933 INFO L225 Difference]: With dead ends: 211 [2018-09-30 10:52:06,933 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 10:52:06,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 10:52:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 10:52:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 10:52:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-30 10:52:06,936 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-30 10:52:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:06,936 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-30 10:52:06,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:52:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-30 10:52:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 10:52:06,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:06,937 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-30 10:52:06,937 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:06,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-30 10:52:06,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:06,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:06,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:06,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:06,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:07,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:07,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:07,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:52:08,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 10:52:08,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:08,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:08,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:08,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:52:08,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:52:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:52:08,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:08,542 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-30 10:52:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:09,673 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 10:52:09,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:52:09,673 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-30 10:52:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:09,674 INFO L225 Difference]: With dead ends: 213 [2018-09-30 10:52:09,674 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 10:52:09,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 10:52:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 10:52:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 10:52:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 10:52:09,678 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-30 10:52:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:09,678 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 10:52:09,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:52:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 10:52:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 10:52:09,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:09,680 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 10:52:09,680 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:09,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-30 10:52:09,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:09,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:09,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:09,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:09,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:10,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:10,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:10,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:10,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:11,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:11,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:52:11,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:52:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:52:11,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:11,159 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-30 10:52:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:12,359 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 10:52:12,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:52:12,359 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 10:52:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:12,360 INFO L225 Difference]: With dead ends: 215 [2018-09-30 10:52:12,360 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 10:52:12,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 10:52:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 10:52:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 10:52:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-30 10:52:12,366 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-30 10:52:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:12,366 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-30 10:52:12,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:52:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-30 10:52:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 10:52:12,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:12,368 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-30 10:52:12,368 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:12,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-30 10:52:12,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:12,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:12,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:12,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:12,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:13,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:13,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:13,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:52:13,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:52:13,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:13,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:13,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:13,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:52:13,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:52:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:52:13,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:13,963 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-30 10:52:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:15,375 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 10:52:15,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:52:15,375 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-30 10:52:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:15,376 INFO L225 Difference]: With dead ends: 217 [2018-09-30 10:52:15,376 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 10:52:15,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 10:52:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 10:52:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 10:52:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 10:52:15,380 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-30 10:52:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:15,381 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 10:52:15,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:52:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 10:52:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 10:52:15,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:15,382 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 10:52:15,382 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:15,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-30 10:52:15,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:15,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:15,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:15,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:15,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:16,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:16,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:16,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:52:16,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 10:52:16,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:16,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:17,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:17,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:52:17,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:52:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:52:17,160 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:17,160 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-30 10:52:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:18,555 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 10:52:18,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:52:18,555 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 10:52:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:18,556 INFO L225 Difference]: With dead ends: 219 [2018-09-30 10:52:18,556 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 10:52:18,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 10:52:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 10:52:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 10:52:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-30 10:52:18,560 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-30 10:52:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:18,560 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-30 10:52:18,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:52:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-30 10:52:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 10:52:18,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:18,562 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-30 10:52:18,562 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:18,562 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-30 10:52:18,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:18,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:18,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:18,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:18,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:19,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:19,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:19,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:52:19,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:52:19,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:19,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:19,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:19,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:52:19,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:52:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:52:19,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:19,994 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-30 10:52:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:21,506 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 10:52:21,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:52:21,507 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-30 10:52:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:21,507 INFO L225 Difference]: With dead ends: 221 [2018-09-30 10:52:21,507 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 10:52:21,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 10:52:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 10:52:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 10:52:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 10:52:21,510 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-30 10:52:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 10:52:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:52:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 10:52:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 10:52:21,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:21,511 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 10:52:21,512 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:21,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:21,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-30 10:52:21,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:21,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:21,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:21,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:21,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:22,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:22,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:22,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:52:22,719 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 10:52:22,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:22,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:23,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:23,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:52:23,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:52:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:52:23,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:23,115 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-30 10:52:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:24,323 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-30 10:52:24,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:52:24,323 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 10:52:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:24,324 INFO L225 Difference]: With dead ends: 223 [2018-09-30 10:52:24,324 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 10:52:24,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 10:52:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 10:52:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 10:52:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-30 10:52:24,328 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-30 10:52:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:24,328 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-30 10:52:24,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:52:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-30 10:52:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 10:52:24,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:24,330 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-30 10:52:24,330 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:24,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-30 10:52:24,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:24,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:24,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:24,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:24,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:25,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:25,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:25,290 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:52:25,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 10:52:25,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:25,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:26,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:26,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 10:52:26,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:52:26,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:52:26,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:26,258 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-30 10:52:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:27,660 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 10:52:27,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 10:52:27,661 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-30 10:52:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:27,661 INFO L225 Difference]: With dead ends: 225 [2018-09-30 10:52:27,661 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 10:52:27,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 10:52:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 10:52:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 10:52:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 10:52:27,664 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-30 10:52:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:27,664 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 10:52:27,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 10:52:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 10:52:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 10:52:27,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:27,665 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-30 10:52:27,665 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:27,665 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-30 10:52:27,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:27,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:27,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:27,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:27,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:28,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:28,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:28,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:28,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:29,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:29,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 10:52:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:52:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:52:29,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:29,124 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-30 10:52:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:30,659 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-30 10:52:30,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 10:52:30,660 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 10:52:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:30,660 INFO L225 Difference]: With dead ends: 227 [2018-09-30 10:52:30,660 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 10:52:30,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 10:52:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 10:52:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 10:52:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-30 10:52:30,663 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-30 10:52:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:30,663 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-30 10:52:30,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:52:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-30 10:52:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 10:52:30,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:30,664 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-30 10:52:30,664 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:30,665 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-30 10:52:30,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:30,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:30,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:30,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:30,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:31,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:31,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:31,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:52:31,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:52:31,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:31,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:32,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:32,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 10:52:32,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:52:32,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:52:32,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:32,349 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-30 10:52:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:34,019 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 10:52:34,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:52:34,019 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-30 10:52:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:34,020 INFO L225 Difference]: With dead ends: 229 [2018-09-30 10:52:34,020 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 10:52:34,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 10:52:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 10:52:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 10:52:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 10:52:34,023 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-30 10:52:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:34,023 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 10:52:34,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:52:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 10:52:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 10:52:34,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:34,024 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-30 10:52:34,024 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:34,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:34,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-30 10:52:34,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:34,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:34,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:34,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:34,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:35,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:35,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:35,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:52:35,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-30 10:52:35,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:35,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:35,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:35,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 10:52:35,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:52:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:52:35,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:35,836 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-09-30 10:52:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:37,384 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-09-30 10:52:37,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 10:52:37,384 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-30 10:52:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:37,385 INFO L225 Difference]: With dead ends: 231 [2018-09-30 10:52:37,385 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 10:52:37,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 10:52:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 10:52:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 10:52:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-09-30 10:52:37,388 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-09-30 10:52:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:37,388 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-09-30 10:52:37,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:52:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-09-30 10:52:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 10:52:37,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:37,389 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-09-30 10:52:37,389 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:37,389 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-09-30 10:52:37,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:37,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:37,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:37,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:37,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:38,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:38,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:38,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:52:38,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:52:38,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:38,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:39,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:39,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 10:52:39,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 10:52:39,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 10:52:39,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:39,138 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-09-30 10:52:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:40,648 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 10:52:40,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 10:52:40,648 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-09-30 10:52:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:40,648 INFO L225 Difference]: With dead ends: 233 [2018-09-30 10:52:40,649 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 10:52:40,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 10:52:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 10:52:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 10:52:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 10:52:40,652 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-09-30 10:52:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:40,652 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 10:52:40,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 10:52:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 10:52:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 10:52:40,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:40,653 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-09-30 10:52:40,653 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:40,653 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:40,653 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-09-30 10:52:40,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:40,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:40,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:40,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:40,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:41,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:41,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:41,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:52:42,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-30 10:52:42,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:42,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:42,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:42,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 10:52:42,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:52:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:52:42,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:42,623 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-09-30 10:52:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:44,268 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-09-30 10:52:44,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 10:52:44,268 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-30 10:52:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:44,269 INFO L225 Difference]: With dead ends: 235 [2018-09-30 10:52:44,269 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 10:52:44,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 10:52:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 10:52:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 10:52:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-09-30 10:52:44,272 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-09-30 10:52:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:44,272 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-09-30 10:52:44,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:52:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-09-30 10:52:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 10:52:44,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:44,273 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-09-30 10:52:44,273 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:44,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-09-30 10:52:44,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:44,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:44,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:44,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:44,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:45,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:45,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:45,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:52:45,721 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-30 10:52:45,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:45,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:46,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:46,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 10:52:46,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 10:52:46,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 10:52:46,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:46,157 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-09-30 10:52:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:48,022 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 10:52:48,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 10:52:48,022 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-09-30 10:52:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:48,023 INFO L225 Difference]: With dead ends: 237 [2018-09-30 10:52:48,023 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 10:52:48,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 10:52:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 10:52:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 10:52:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 10:52:48,026 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-09-30 10:52:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:48,026 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 10:52:48,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 10:52:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 10:52:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 10:52:48,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:48,027 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-09-30 10:52:48,027 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:48,027 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:48,027 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-09-30 10:52:48,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:48,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:48,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:48,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:48,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:49,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:49,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:49,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:49,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:49,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:49,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 10:52:49,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:52:49,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:52:49,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:49,631 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-09-30 10:52:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:51,284 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-09-30 10:52:51,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 10:52:51,285 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-30 10:52:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:51,285 INFO L225 Difference]: With dead ends: 239 [2018-09-30 10:52:51,285 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 10:52:51,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 10:52:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 10:52:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 10:52:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-09-30 10:52:51,289 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-09-30 10:52:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:51,290 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-09-30 10:52:51,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:52:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-09-30 10:52:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 10:52:51,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:51,291 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-09-30 10:52:51,291 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:51,291 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-09-30 10:52:51,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:51,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:51,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:52,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:52,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:52,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:52:52,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:52:52,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:52,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:53,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:53,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 10:52:53,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 10:52:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 10:52:53,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:53,071 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-09-30 10:52:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:54,935 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 10:52:54,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 10:52:54,936 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-09-30 10:52:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:54,936 INFO L225 Difference]: With dead ends: 241 [2018-09-30 10:52:54,936 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 10:52:54,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 10:52:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 10:52:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 10:52:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 10:52:54,940 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-09-30 10:52:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:54,940 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 10:52:54,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 10:52:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 10:52:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 10:52:54,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:54,941 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-09-30 10:52:54,941 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:54,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-09-30 10:52:54,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:54,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:54,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:54,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:54,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:56,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:56,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:56,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:52:56,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-30 10:52:56,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:56,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:57,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:57,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 10:52:57,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:52:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:52:57,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:57,038 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-09-30 10:52:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:58,528 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-09-30 10:52:58,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 10:52:58,528 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-30 10:52:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:58,529 INFO L225 Difference]: With dead ends: 243 [2018-09-30 10:52:58,529 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 10:52:58,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 10:52:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 10:52:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 10:52:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-09-30 10:52:58,532 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-09-30 10:52:58,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:58,532 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-09-30 10:52:58,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:52:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-09-30 10:52:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 10:52:58,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:58,533 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-09-30 10:52:58,533 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:58,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:58,533 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-09-30 10:52:58,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:58,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:58,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:58,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:58,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:59,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:59,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:59,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:52:59,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:52:59,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:59,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:00,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:00,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 10:53:00,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 10:53:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 10:53:00,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:00,334 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-09-30 10:53:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:02,098 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 10:53:02,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 10:53:02,099 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-09-30 10:53:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:02,099 INFO L225 Difference]: With dead ends: 245 [2018-09-30 10:53:02,100 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 10:53:02,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 10:53:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 10:53:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 10:53:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 10:53:02,103 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-09-30 10:53:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:02,103 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 10:53:02,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 10:53:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 10:53:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 10:53:02,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:02,104 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-09-30 10:53:02,104 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:02,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-09-30 10:53:02,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:02,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:02,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:02,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:02,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:03,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:03,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:03,185 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:53:03,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-30 10:53:03,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:03,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:04,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:04,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 10:53:04,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 10:53:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 10:53:04,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:04,020 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-09-30 10:53:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:05,615 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-09-30 10:53:05,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 10:53:05,616 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-30 10:53:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:05,616 INFO L225 Difference]: With dead ends: 247 [2018-09-30 10:53:05,616 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 10:53:05,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 10:53:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 10:53:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 10:53:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-09-30 10:53:05,620 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-09-30 10:53:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:05,620 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-09-30 10:53:05,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 10:53:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-09-30 10:53:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 10:53:05,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:05,621 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-09-30 10:53:05,621 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:05,621 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-09-30 10:53:05,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:05,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:05,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:05,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:05,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:06,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:06,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:06,706 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:53:07,115 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-30 10:53:07,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:07,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:07,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:07,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 10:53:07,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 10:53:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 10:53:07,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:07,559 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-09-30 10:53:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:09,467 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 10:53:09,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 10:53:09,467 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-09-30 10:53:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:09,468 INFO L225 Difference]: With dead ends: 249 [2018-09-30 10:53:09,468 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 10:53:09,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 10:53:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 10:53:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 10:53:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 10:53:09,471 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-09-30 10:53:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:09,471 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 10:53:09,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 10:53:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 10:53:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 10:53:09,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:09,472 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-09-30 10:53:09,472 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:09,472 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-09-30 10:53:09,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:09,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:09,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:09,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:09,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:10,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:10,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:10,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:10,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:11,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:11,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 10:53:11,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 10:53:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 10:53:11,297 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:11,297 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-09-30 10:53:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:12,835 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-09-30 10:53:12,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 10:53:12,836 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-30 10:53:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:12,836 INFO L225 Difference]: With dead ends: 251 [2018-09-30 10:53:12,836 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 10:53:12,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 10:53:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 10:53:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 10:53:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-09-30 10:53:12,840 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-09-30 10:53:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:12,840 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-09-30 10:53:12,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 10:53:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-09-30 10:53:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 10:53:12,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:12,841 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-09-30 10:53:12,841 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:12,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-09-30 10:53:12,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:12,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:12,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:12,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:12,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:13,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:13,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:14,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:53:14,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:53:14,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:14,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:14,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:14,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 10:53:14,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 10:53:14,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 10:53:14,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:14,645 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-09-30 10:53:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:16,690 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 10:53:16,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 10:53:16,690 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-09-30 10:53:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:16,691 INFO L225 Difference]: With dead ends: 253 [2018-09-30 10:53:16,691 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 10:53:16,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 10:53:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 10:53:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 10:53:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 10:53:16,694 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-09-30 10:53:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:16,694 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 10:53:16,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 10:53:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 10:53:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 10:53:16,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:16,695 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-09-30 10:53:16,695 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:16,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-09-30 10:53:16,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:16,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:16,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:16,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:16,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:17,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:17,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:17,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:53:18,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-30 10:53:18,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:18,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:18,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:18,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 10:53:18,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:53:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:53:18,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:18,832 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-09-30 10:53:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:20,840 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-09-30 10:53:20,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 10:53:20,841 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-30 10:53:20,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:20,841 INFO L225 Difference]: With dead ends: 255 [2018-09-30 10:53:20,841 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 10:53:20,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 10:53:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 10:53:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 10:53:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-09-30 10:53:20,845 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-09-30 10:53:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:20,845 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-09-30 10:53:20,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:53:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-09-30 10:53:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 10:53:20,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:20,846 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-09-30 10:53:20,846 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:20,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-09-30 10:53:20,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:20,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:20,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:22,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:22,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:22,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:53:22,262 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:53:22,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:22,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:22,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:22,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 10:53:22,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 10:53:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 10:53:22,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:22,785 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-09-30 10:53:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:24,918 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 10:53:24,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 10:53:24,918 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-09-30 10:53:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:24,919 INFO L225 Difference]: With dead ends: 257 [2018-09-30 10:53:24,919 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 10:53:24,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 10:53:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 10:53:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 10:53:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 10:53:24,922 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-09-30 10:53:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:24,923 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 10:53:24,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 10:53:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 10:53:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 10:53:24,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:24,924 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-09-30 10:53:24,924 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:24,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-09-30 10:53:24,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:24,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:24,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:24,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:24,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:26,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:26,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:26,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:53:26,562 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-30 10:53:26,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:26,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:27,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:27,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 10:53:27,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 10:53:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 10:53:27,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:27,047 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-09-30 10:53:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:29,063 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-09-30 10:53:29,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 10:53:29,064 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-30 10:53:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:29,064 INFO L225 Difference]: With dead ends: 259 [2018-09-30 10:53:29,064 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 10:53:29,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 10:53:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 10:53:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 10:53:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-09-30 10:53:29,068 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-09-30 10:53:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:29,068 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-09-30 10:53:29,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 10:53:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-09-30 10:53:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 10:53:29,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:29,070 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-09-30 10:53:29,070 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:29,070 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-09-30 10:53:29,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:29,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:29,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:29,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:29,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:30,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:30,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:30,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:53:30,740 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-30 10:53:30,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:30,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:31,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:31,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 10:53:31,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 10:53:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 10:53:31,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:31,208 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-09-30 10:53:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:33,126 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 10:53:33,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 10:53:33,127 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-09-30 10:53:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:33,127 INFO L225 Difference]: With dead ends: 261 [2018-09-30 10:53:33,127 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 10:53:33,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 10:53:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 10:53:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 10:53:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 10:53:33,131 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-09-30 10:53:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:33,132 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 10:53:33,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 10:53:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 10:53:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 10:53:33,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:33,133 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-09-30 10:53:33,133 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:33,133 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-09-30 10:53:33,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:33,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:33,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:33,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:33,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:34,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:34,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:34,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:34,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:34,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:34,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 10:53:34,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:53:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:53:34,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:34,996 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-09-30 10:53:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:37,192 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-09-30 10:53:37,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 10:53:37,192 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-30 10:53:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:37,193 INFO L225 Difference]: With dead ends: 263 [2018-09-30 10:53:37,193 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 10:53:37,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 10:53:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 10:53:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 10:53:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-09-30 10:53:37,197 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-09-30 10:53:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:37,198 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-09-30 10:53:37,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:53:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-09-30 10:53:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 10:53:37,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:37,199 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-09-30 10:53:37,199 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:37,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-09-30 10:53:37,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:37,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:37,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:37,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:37,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:38,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:38,586 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 [2018-09-30 10:53:38,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:53:38,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:53:38,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:38,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:39,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:39,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 10:53:39,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 10:53:39,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 10:53:39,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:39,276 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-09-30 10:53:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:41,700 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 10:53:41,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 10:53:41,700 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-09-30 10:53:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:41,701 INFO L225 Difference]: With dead ends: 265 [2018-09-30 10:53:41,701 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 10:53:41,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 10:53:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 10:53:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 10:53:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 10:53:41,705 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-09-30 10:53:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:41,706 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 10:53:41,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 10:53:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 10:53:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 10:53:41,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:41,707 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-09-30 10:53:41,707 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:41,707 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:41,707 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-09-30 10:53:41,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:41,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:41,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:41,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:41,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:43,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:43,152 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 [2018-09-30 10:53:43,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:53:43,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-30 10:53:43,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:43,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:44,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:44,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 10:53:44,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:53:44,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:53:44,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:44,115 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. Received shutdown request... [2018-09-30 10:53:45,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 10:53:45,873 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:53:45,879 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:53:45,879 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:53:45 BoogieIcfgContainer [2018-09-30 10:53:45,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:53:45,880 INFO L168 Benchmark]: Toolchain (without parser) took 243865.61 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 33.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-30 10:53:45,881 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-09-30 10:53:45,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.31 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. [2018-09-30 10:53:45,882 INFO L168 Benchmark]: Boogie Preprocessor took 20.77 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. [2018-09-30 10:53:45,882 INFO L168 Benchmark]: RCFGBuilder took 279.76 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. [2018-09-30 10:53:45,883 INFO L168 Benchmark]: TraceAbstraction took 243518.71 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-30 10:53:45,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.31 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 20.77 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 279.76 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 243518.71 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was constructing difference of abstraction (263states) and FLOYD_HOARE automaton (currently 122 states, 132 states before enhancement), while ReachableStatesComputation was computing reachable states (239 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 243.4s OverallTime, 130 OverallIterations, 130 TraceHistogramMax, 97.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 518 SDtfs, 0 SDslu, 12765 SDs, 0 SdLazy, 12896 SolverSat, 243 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25802 GetRequests, 17287 SyntacticMatches, 0 SemanticMatches, 8515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=263occurred in iteration=129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 129 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.4s SsaConstructionTime, 26.3s SatisfiabilityAnalysisTime, 108.8s InterpolantComputationTime, 34576 NumberOfCodeBlocks, 34576 NumberOfCodeBlocksAsserted, 4505 NumberOfCheckSat, 34317 ConstructedInterpolants, 0 QuantifiedInterpolants, 17915799 SizeOfPredicates, 386 NumberOfNonLiveVariables, 102555 ConjunctsInSsa, 9284 ConjunctsInUnsatCore, 259 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1464580 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-53-45-896.csv 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-TraceAbstractionBenchmarks-0-2018-09-30_10-53-45-896.csv Completed graceful shutdown