java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:43:01,710 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:43:01,713 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:43:01,727 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:43:01,728 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:43:01,729 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:43:01,730 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:43:01,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:43:01,734 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:43:01,735 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:43:01,736 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:43:01,775 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:43:01,804 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:43:01,805 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:43:01,806 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:43:01,806 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:43:01,807 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:43:01,807 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:43:01,807 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:43:01,808 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:43:01,808 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:43:01,808 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:43:01,808 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:43:01,808 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:43:01,809 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:43:01,809 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:43:01,810 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:43:01,810 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:43:01,810 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:43:01,811 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:43:01,812 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:43:01,812 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:43:01,812 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:43:01,812 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:43:01,812 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:43:01,813 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:43:01,813 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:43:01,813 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:43:01,813 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:43:01,814 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:43:01,814 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:43:01,814 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:43:01,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:43:01,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:43:01,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:43:01,887 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:43:01,888 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:43:01,889 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl [2018-10-03 08:43:01,889 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl' [2018-10-03 08:43:01,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:43:01,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:43:01,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:43:01,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:43:01,954 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:43:01,976 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:01,988 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:01,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:43:01,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:43:01,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:43:01,998 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:43:02,009 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,010 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,011 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,011 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,015 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,019 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,020 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 03.10 08:43:01" (1/1) ... [2018-10-03 08:43:02,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:43:02,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:43:02,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:43:02,023 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:43:02,024 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 03.10 08:43:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:43:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:43:02,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:43:02,345 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:43:02,346 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:43:02 BoogieIcfgContainer [2018-10-03 08:43:02,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:43:02,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:43:02,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:43:02,352 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:43:02,353 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 03.10 08:43:01" (1/2) ... [2018-10-03 08:43:02,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb2a4b0 and model type count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:43:02, skipping insertion in model container [2018-10-03 08:43:02,354 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 03.10 08:43:02" (2/2) ... [2018-10-03 08:43:02,356 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bpl [2018-10-03 08:43:02,368 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:43:02,378 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:43:02,439 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:43:02,440 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:43:02,440 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:43:02,440 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:43:02,441 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:43:02,441 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:43:02,441 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:43:02,441 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:43:02,441 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:43:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 08:43:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:43:02,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:02,479 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:43:02,481 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:02,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-03 08:43:02,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:02,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:02,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:02,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:02,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:43:02,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:43:02,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:43:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:43:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:43:02,708 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 08:43:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:02,756 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-03 08:43:02,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:43:02,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-03 08:43:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:02,768 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:43:02,768 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:43:02,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:43:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:43:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:43:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:43:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:43:02,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-03 08:43:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:02,809 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:43:02,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:43:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:43:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:43:02,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:02,810 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-03 08:43:02,811 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:02,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-03 08:43:02,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:02,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:02,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:02,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:02,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:02,950 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) [2018-10-03 08:43:02,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:03,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:03,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:43:03,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:43:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:43:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:43:03,084 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-03 08:43:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:03,118 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:43:03,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:43:03,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:43:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:03,120 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:43:03,120 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:43:03,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:43:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:43:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:43:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:43:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:43:03,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-03 08:43:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:03,124 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:43:03,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:43:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:43:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:43:03,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:03,125 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-03 08:43:03,126 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:03,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:03,126 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-03 08:43:03,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:03,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:03,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:03,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:03,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:03,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:03,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:03,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:03,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:03,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:43:03,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:43:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:43:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:43:03,305 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-03 08:43:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:03,329 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:43:03,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:43:03,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:43:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:03,331 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:43:03,331 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:43:03,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:43:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:43:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:43:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:43:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:43:03,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-03 08:43:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:03,336 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:43:03,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:43:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:43:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:43:03,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:03,337 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-03 08:43:03,338 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:03,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:03,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-03 08:43:03,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:03,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:03,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:03,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:03,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:03,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:03,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:43:03,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:03,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:03,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:43:03,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:43:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:43:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:43:03,604 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-03 08:43:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:03,643 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:43:03,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:43:03,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 08:43:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:03,644 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:43:03,645 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:43:03,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:43:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:43:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:43:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:43:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:43:03,650 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-03 08:43:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:03,651 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:43:03,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:43:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:43:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:43:03,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:03,652 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-03 08:43:03,653 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:03,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-03 08:43:03,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:03,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:03,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:03,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:03,995 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) [2018-10-03 08:43:04,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:04,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:04,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:04,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:04,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:04,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:43:04,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:43:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:43:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:43:04,099 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-03 08:43:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:04,138 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:43:04,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:43:04,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-03 08:43:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:04,139 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:43:04,140 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:43:04,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:43:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:43:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:43:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:43:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:43:04,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-03 08:43:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:04,149 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:43:04,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:43:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:43:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:43:04,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:04,150 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-03 08:43:04,151 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:04,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-03 08:43:04,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:04,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:04,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:04,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:04,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:04,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:04,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:04,459 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:43:04,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:04,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:04,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:04,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:43:04,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:43:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:43:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:43:04,494 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-03 08:43:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:04,527 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:43:04,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:43:04,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 08:43:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:04,530 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:43:04,530 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:43:04,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:43:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:43:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:43:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:43:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:43:04,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-03 08:43:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:04,536 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:43:04,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:43:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:43:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:43:04,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:04,537 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-03 08:43:04,537 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:04,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:04,538 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-03 08:43:04,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:04,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:04,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:04,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:04,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:04,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:04,706 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:04,743 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:43:04,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:04,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:04,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:04,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:43:04,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:43:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:43:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:43:04,787 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-03 08:43:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:04,951 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:43:04,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:43:04,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:43:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:04,953 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:43:04,953 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:43:04,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:43:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:43:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:43:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:43:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:43:04,958 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-03 08:43:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:04,958 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:43:04,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:43:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:43:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:43:04,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:04,960 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-03 08:43:04,960 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:04,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-03 08:43:04,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:04,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:04,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:04,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:05,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:05,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:05,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:43:05,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:43:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:43:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:43:05,529 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-03 08:43:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:05,558 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:43:05,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:43:05,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:43:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:05,560 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:43:05,561 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:43:05,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:43:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:43:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:43:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:43:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:43:05,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-03 08:43:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:05,567 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:43:05,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:43:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:43:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:43:05,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:05,568 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-03 08:43:05,568 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:05,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-03 08:43:05,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:05,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:05,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:05,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:05,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:05,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:05,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:05,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:43:05,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:43:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:43:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:43:05,840 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-03 08:43:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:05,910 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:43:05,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:43:05,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-03 08:43:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:05,912 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:43:05,912 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:43:05,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:43:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:43:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:43:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:43:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:43:05,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-03 08:43:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:05,918 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:43:05,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:43:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:43:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:43:05,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:05,920 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-03 08:43:05,920 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:05,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:05,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-03 08:43:05,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:05,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:05,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:05,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:06,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:06,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:06,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:43:06,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:06,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:06,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:43:06,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:43:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:43:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:43:06,233 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-03 08:43:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:06,276 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:43:06,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:43:06,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 08:43:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:06,278 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:43:06,278 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:43:06,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:43:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:43:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:43:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:43:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:43:06,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-03 08:43:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:06,285 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:43:06,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:43:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:43:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:43:06,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:06,286 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-03 08:43:06,286 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:06,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:06,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-03 08:43:06,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:06,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:06,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:06,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:06,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:06,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:06,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:06,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:06,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:06,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:43:06,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:43:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:43:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:43:06,673 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-03 08:43:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:06,710 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:43:06,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:43:06,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-03 08:43:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:06,712 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:43:06,712 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:43:06,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:43:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:43:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:43:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:43:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:43:06,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-03 08:43:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:06,718 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:43:06,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:43:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:43:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:43:06,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:06,720 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-03 08:43:06,720 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:06,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-03 08:43:06,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:06,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:06,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:06,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:07,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:43:07,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:07,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:07,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:07,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:43:07,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:43:07,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:43:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:43:07,081 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-03 08:43:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:07,268 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:43:07,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:43:07,269 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 08:43:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:07,269 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:43:07,270 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:43:07,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:43:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:43:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:43:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:43:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:43:07,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-03 08:43:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:43:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:43:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:43:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:43:07,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:07,277 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-03 08:43:07,277 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:07,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-03 08:43:07,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:07,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:07,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:07,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:07,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:07,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:07,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:07,904 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:07,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:43:07,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:07,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:07,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:07,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:43:07,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:43:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:43:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:43:07,977 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-03 08:43:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:08,029 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:43:08,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:43:08,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-03 08:43:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:08,031 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:43:08,031 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:43:08,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:43:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:43:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:43:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:43:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:43:08,036 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-03 08:43:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:08,037 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:43:08,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:43:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:43:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:43:08,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:08,038 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-03 08:43:08,038 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:08,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-03 08:43:08,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:08,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:08,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:08,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:08,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:08,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:08,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:08,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:43:08,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:43:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:43:08,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:43:08,434 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-03 08:43:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:08,536 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:43:08,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:43:08,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 08:43:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:08,539 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:43:08,540 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:43:08,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:43:08,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:43:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:43:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:43:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:43:08,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-03 08:43:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:08,549 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:43:08,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:43:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:43:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:43:08,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:08,550 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-03 08:43:08,551 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:08,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-03 08:43:08,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:08,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:08,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:08,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:08,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:08,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:08,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:08,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:08,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:08,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:43:08,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:43:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:43:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:43:08,881 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-03 08:43:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:08,925 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:43:08,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:43:08,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-03 08:43:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:08,926 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:43:08,926 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:43:08,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:43:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:43:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:43:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:43:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:43:08,932 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-03 08:43:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:08,933 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:43:08,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:43:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:43:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:43:08,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:08,934 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-03 08:43:08,934 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:08,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-03 08:43:08,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:08,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:08,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:08,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:09,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:09,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:09,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:09,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:43:09,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:09,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:09,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:09,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:43:09,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:43:09,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:43:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:43:09,527 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-03 08:43:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:09,629 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:43:09,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:43:09,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 08:43:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:09,631 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:43:09,631 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:43:09,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:43:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:43:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:43:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:43:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:43:09,637 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-03 08:43:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:09,637 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:43:09,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:43:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:43:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:43:09,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:09,638 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-03 08:43:09,638 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:09,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-03 08:43:09,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:09,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:09,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:09,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:09,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:10,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:10,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:10,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:10,420 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:10,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:10,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:10,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:10,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:43:10,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:43:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:43:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:43:10,475 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-03 08:43:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:10,625 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:43:10,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:43:10,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-03 08:43:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:10,626 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:43:10,627 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:43:10,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:43:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:43:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:43:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:43:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:43:10,634 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-03 08:43:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:10,634 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:43:10,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:43:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:43:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:43:10,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:10,635 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-03 08:43:10,636 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:10,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-03 08:43:10,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:10,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:10,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:10,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:10,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:11,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:11,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:11,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:43:11,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:11,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:11,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:43:11,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:43:11,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:43:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:43:11,678 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-03 08:43:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:11,782 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:43:11,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:43:11,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-03 08:43:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:11,783 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:43:11,783 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:43:11,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:43:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:43:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:43:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:43:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:43:11,789 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-03 08:43:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:11,789 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:43:11,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:43:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:43:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:43:11,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:11,790 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-03 08:43:11,791 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:11,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-03 08:43:11,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:11,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:11,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:11,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:12,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:12,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:12,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:43:12,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:12,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:12,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:43:12,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:43:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:43:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:43:12,330 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-03 08:43:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:12,594 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:43:12,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:43:12,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-03 08:43:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:12,595 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:43:12,595 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:43:12,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:43:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:43:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:43:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:43:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:43:12,601 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-03 08:43:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:12,601 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:43:12,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:43:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:43:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:43:12,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:12,602 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-03 08:43:12,603 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:12,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:12,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-03 08:43:12,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:12,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:13,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:13,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:13,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:13,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:43:13,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:43:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:43:13,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:43:13,604 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-03 08:43:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:13,659 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:43:13,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:43:13,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-03 08:43:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:13,660 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:43:13,660 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:43:13,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:43:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:43:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:43:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:43:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:43:13,675 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-03 08:43:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:43:13,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:43:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:43:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:43:13,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:13,676 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-03 08:43:13,679 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:13,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-03 08:43:13,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:13,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:13,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:13,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:14,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:14,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:14,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:14,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:14,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:43:14,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:43:14,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:43:14,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:43:14,091 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-03 08:43:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:14,227 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:43:14,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:43:14,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-03 08:43:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:14,228 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:43:14,228 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:43:14,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:43:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:43:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:43:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:43:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:43:14,234 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-03 08:43:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:14,234 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:43:14,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:43:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:43:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:43:14,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:14,235 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-03 08:43:14,235 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:14,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:14,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-03 08:43:14,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:14,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:14,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:14,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:14,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:14,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:14,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:43:14,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:14,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:43:14,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:43:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:43:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:43:14,882 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-03 08:43:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:15,183 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:43:15,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:43:15,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-03 08:43:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:15,186 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:43:15,186 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:43:15,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:43:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:43:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:43:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:43:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:43:15,191 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-03 08:43:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:15,191 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:43:15,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:43:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:43:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:43:15,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:15,192 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-03 08:43:15,193 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:15,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-03 08:43:15,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:15,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:15,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:15,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:15,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:15,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:15,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:15,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:15,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:15,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:43:15,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:43:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:43:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:43:15,749 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-03 08:43:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:15,809 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:43:15,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:43:15,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-03 08:43:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:15,811 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:43:15,812 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:43:15,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:43:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:43:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:43:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:43:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:43:15,815 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-03 08:43:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:15,815 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:43:15,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:43:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:43:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:43:15,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:15,816 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-03 08:43:15,816 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:15,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-03 08:43:15,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:15,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:15,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:15,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:16,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:16,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:16,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:16,916 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:43:16,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:16,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:16,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:16,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:43:16,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:43:16,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:43:16,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:16,968 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-03 08:43:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:17,130 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:43:17,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:43:17,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-03 08:43:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:17,131 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:43:17,132 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:43:17,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:43:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:43:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:43:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:43:17,136 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-03 08:43:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:17,137 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:43:17,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:43:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:43:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:43:17,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:17,138 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-03 08:43:17,138 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:17,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-03 08:43:17,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:17,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:17,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:17,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:18,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:18,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:18,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:18,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:43:18,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:18,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:18,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:18,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:43:18,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:43:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:43:18,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:43:18,382 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-03 08:43:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:18,431 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:43:18,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:43:18,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-03 08:43:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:18,432 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:43:18,433 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:43:18,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:43:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:43:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:43:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:43:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:43:18,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-03 08:43:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:18,437 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:43:18,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:43:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:43:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:43:18,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:18,438 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-03 08:43:18,438 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:18,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-03 08:43:18,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:18,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:18,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:18,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:18,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:19,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:19,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:19,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:19,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:19,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:19,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:43:19,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:43:19,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:43:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:43:19,134 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-03 08:43:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:19,184 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:43:19,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:43:19,185 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-03 08:43:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:19,186 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:43:19,186 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:43:19,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:43:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:43:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:43:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:43:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:43:19,190 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-03 08:43:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:19,190 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:43:19,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:43:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:43:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:43:19,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:19,191 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-03 08:43:19,191 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:19,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-03 08:43:19,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:19,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:19,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:19,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:19,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:20,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:20,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:20,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:20,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:20,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:20,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:43:20,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:43:20,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:43:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:20,197 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-03 08:43:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:20,273 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:43:20,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:43:20,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-03 08:43:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:20,274 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:43:20,275 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:43:20,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:43:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:43:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:43:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:43:20,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-03 08:43:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:20,279 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:43:20,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:43:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:43:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:43:20,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:20,280 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-03 08:43:20,280 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:20,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-03 08:43:20,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:20,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:20,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:20,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:20,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:20,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:20,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 08:43:20,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:20,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:20,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:43:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:43:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:43:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:43:20,874 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-03 08:43:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:20,957 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:43:20,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:43:20,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-03 08:43:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:20,958 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:43:20,959 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:43:20,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:43:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:43:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:43:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:43:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:43:20,963 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-03 08:43:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:20,963 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:43:20,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:43:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:43:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:43:20,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:20,964 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-03 08:43:20,964 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:20,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-03 08:43:20,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:20,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:20,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:20,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:21,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:21,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:21,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:21,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:21,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:21,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:43:21,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:43:21,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:43:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:43:21,639 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-03 08:43:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:21,725 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:43:21,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:43:21,725 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-03 08:43:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:21,726 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:43:21,726 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:43:21,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:43:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:43:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:43:21,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:43:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:43:21,731 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-03 08:43:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:21,731 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:43:21,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:43:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:43:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:43:21,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:21,732 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-03 08:43:21,732 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:21,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-03 08:43:21,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:21,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:21,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:21,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:22,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:22,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:22,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:22,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-03 08:43:22,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:22,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:22,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:22,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:43:22,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:43:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:43:22,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:43:22,362 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-03 08:43:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:22,465 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:43:22,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:43:22,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-03 08:43:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:22,466 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:43:22,466 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:43:22,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:43:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:43:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:43:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:43:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:43:22,470 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-03 08:43:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:22,470 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:43:22,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:43:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:43:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:43:22,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:22,471 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-03 08:43:22,471 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:22,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:22,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-03 08:43:22,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:22,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:22,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:22,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:22,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:23,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:23,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:23,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:23,585 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:43:23,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:23,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:23,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:23,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:43:23,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:43:23,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:43:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:43:23,621 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-03 08:43:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:23,743 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:43:23,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:43:23,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-03 08:43:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:23,745 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:43:23,745 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:43:23,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:43:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:43:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:43:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:43:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:43:23,751 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-03 08:43:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:23,751 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:43:23,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:43:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:43:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:43:23,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:23,752 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-03 08:43:23,752 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:23,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-03 08:43:23,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:23,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:23,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:23,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:23,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:24,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:24,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:24,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:24,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:24,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:24,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:43:24,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:43:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:43:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:43:24,394 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-03 08:43:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:24,461 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:43:24,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:43:24,462 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-03 08:43:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:24,463 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:43:24,463 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:43:24,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:43:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:43:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:43:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:43:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:43:24,467 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-03 08:43:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:24,467 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:43:24,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:43:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:43:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:43:24,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:24,468 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-03 08:43:24,468 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:24,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-03 08:43:24,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:24,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:24,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:24,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:24,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:25,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:25,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:25,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:25,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:25,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:25,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:25,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:25,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:43:25,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:43:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:43:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:43:25,597 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-03 08:43:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:25,649 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:43:25,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:43:25,650 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-03 08:43:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:25,651 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:43:25,651 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:43:25,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:43:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:43:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:43:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:43:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:43:25,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-03 08:43:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:25,656 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:43:25,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:43:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:43:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:43:25,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:25,657 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-03 08:43:25,657 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:25,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-03 08:43:25,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:25,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:25,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:25,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:25,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:26,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:26,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:26,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:26,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 08:43:26,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:26,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:26,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:26,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:43:26,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:43:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:43:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:43:26,826 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-03 08:43:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:26,911 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:43:26,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:43:26,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-03 08:43:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:26,913 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:43:26,913 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:43:26,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:43:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:43:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:43:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:43:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:43:26,917 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-03 08:43:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:26,917 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:43:26,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:43:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:43:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:43:26,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:26,918 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-03 08:43:26,919 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:26,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-03 08:43:26,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:26,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:26,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:26,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:26,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:27,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:27,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:27,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:27,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:27,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:27,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:43:27,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:43:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:43:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:43:27,807 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-03 08:43:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:27,979 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:43:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:43:27,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-03 08:43:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:27,981 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:43:27,981 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:43:27,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:43:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:43:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:43:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:43:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:43:27,985 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-03 08:43:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:27,986 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:43:27,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:43:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:43:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:43:27,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:27,986 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-03 08:43:27,987 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:27,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-03 08:43:27,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:27,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:27,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:27,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:27,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:28,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:28,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:28,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:28,726 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-03 08:43:28,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:28,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:28,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:28,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:43:28,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:43:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:43:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:43:28,775 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-03 08:43:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:28,843 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:43:28,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:43:28,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-03 08:43:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:28,845 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:43:28,845 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:43:28,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:43:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:43:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:43:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:43:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:43:28,848 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-03 08:43:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:28,848 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:43:28,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:43:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:43:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:43:28,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:28,849 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-03 08:43:28,849 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:28,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-03 08:43:28,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:28,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:28,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:28,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:29,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:29,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:29,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:43:29,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:29,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:29,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:43:29,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:43:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:43:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:43:29,703 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-03 08:43:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:29,772 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:43:29,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:43:29,772 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-03 08:43:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:29,773 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:43:29,774 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:43:29,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:43:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:43:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:43:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:43:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:43:29,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-03 08:43:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:29,778 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:43:29,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:43:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:43:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:43:29,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:29,779 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-03 08:43:29,779 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:29,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-03 08:43:29,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:29,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:29,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:29,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:29,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:30,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:30,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:30,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:30,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:30,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:30,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:43:30,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:43:30,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:43:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:43:30,973 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-03 08:43:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:31,051 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:43:31,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:43:31,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-03 08:43:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:31,053 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:43:31,053 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:43:31,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:43:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:43:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:43:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:43:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:43:31,058 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-03 08:43:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:31,058 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:43:31,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:43:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:43:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:43:31,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:31,059 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-03 08:43:31,059 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:31,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:31,059 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-03 08:43:31,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:31,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:31,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:31,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:31,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:31,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:31,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:31,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:31,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:31,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:31,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:31,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:31,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:43:31,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:43:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:43:31,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:43:31,953 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-03 08:43:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:32,033 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:43:32,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:43:32,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-03 08:43:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:32,034 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:43:32,034 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:43:32,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:43:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:43:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:43:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:43:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:43:32,038 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-03 08:43:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:32,038 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:43:32,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:43:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:43:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:43:32,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:32,039 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-03 08:43:32,039 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:32,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-03 08:43:32,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:32,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:32,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:32,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:32,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:32,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:32,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-03 08:43:32,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:32,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:32,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:32,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:43:32,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:43:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:43:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:43:32,956 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-03 08:43:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:33,413 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:43:33,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:43:33,414 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-03 08:43:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:33,415 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:43:33,415 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:43:33,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:43:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:43:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:43:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:43:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:43:33,419 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-03 08:43:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:33,419 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:43:33,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:43:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:43:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:43:33,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:33,420 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-03 08:43:33,421 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:33,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-03 08:43:33,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:33,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:33,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:33,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:33,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:34,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:34,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:34,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:34,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:34,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:34,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:34,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:34,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:43:34,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:43:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:43:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:43:34,319 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-03 08:43:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:34,394 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:43:34,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:43:34,395 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-03 08:43:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:34,395 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:43:34,396 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:43:34,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:43:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:43:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:43:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:43:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:43:34,400 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-03 08:43:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:34,400 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:43:34,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:43:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:43:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:43:34,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:34,401 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-03 08:43:34,401 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:34,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-03 08:43:34,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:34,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:34,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:34,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:34,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:37,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:37,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:37,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:37,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-03 08:43:37,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:37,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:37,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:37,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:43:37,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:43:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:43:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:43:37,482 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-03 08:43:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:37,579 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:43:37,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:43:37,580 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-03 08:43:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:37,580 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:43:37,581 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:43:37,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:43:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:43:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:43:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:43:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:43:37,596 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-03 08:43:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:43:37,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:43:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:43:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:43:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:37,597 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-03 08:43:37,598 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:37,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-03 08:43:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:37,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:38,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:38,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:38,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:38,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:43:38,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:38,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:38,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:38,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:43:38,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:43:38,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:43:38,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:43:38,647 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-03 08:43:38,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:38,736 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:43:38,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:43:38,736 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-03 08:43:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:38,737 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:43:38,737 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:43:38,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:43:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:43:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:43:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:43:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:43:38,742 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-03 08:43:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:38,743 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:43:38,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:43:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:43:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:43:38,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:38,743 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-03 08:43:38,743 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:38,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-03 08:43:38,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:38,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:38,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:38,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:38,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:40,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:40,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:40,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:40,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:40,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:40,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:43:40,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:43:40,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:43:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:43:40,927 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-03 08:43:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:41,040 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:43:41,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:43:41,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-03 08:43:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:41,041 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:43:41,041 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:43:41,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:43:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:43:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:43:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:43:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:43:41,044 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-03 08:43:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:41,045 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:43:41,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:43:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:43:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:43:41,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:41,046 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-03 08:43:41,046 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:41,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-03 08:43:41,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:41,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:41,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:41,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:41,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:42,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:42,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:42,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:42,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:42,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:42,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:42,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:42,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:43:42,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:43:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:43:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:43:42,135 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-03 08:43:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:42,486 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:43:42,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:43:42,486 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-03 08:43:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:42,487 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:43:42,487 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:43:42,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:43:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:43:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:43:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:43:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:43:42,491 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-03 08:43:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:42,492 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:43:42,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:43:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:43:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:43:42,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:42,493 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-03 08:43:42,493 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:42,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-03 08:43:42,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:42,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:42,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:42,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:42,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:43,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:43,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:43,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:43,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-03 08:43:43,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:43,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:43,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:43,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:43:43,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:43:43,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:43:43,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:43:43,923 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-03 08:43:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:43,999 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:43:44,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:43:44,000 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-03 08:43:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:44,001 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:43:44,001 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:43:44,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:43:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:43:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:43:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:43:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:43:44,005 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-03 08:43:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:44,005 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:43:44,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:43:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:43:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:43:44,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:44,006 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-03 08:43:44,006 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:44,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-03 08:43:44,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:44,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:44,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:44,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:44,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:45,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:45,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:45,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:45,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:45,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:45,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:45,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:45,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:43:45,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:43:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:43:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:43:45,494 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-03 08:43:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:46,449 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:43:46,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:43:46,449 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-03 08:43:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:46,450 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:43:46,450 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:43:46,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:43:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:43:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:43:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:43:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:43:46,454 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-03 08:43:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:46,455 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:43:46,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:43:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:43:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:43:46,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:46,456 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-03 08:43:46,456 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:46,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-03 08:43:46,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:46,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:46,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:47,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:47,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:47,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:47,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-03 08:43:47,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:47,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:47,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:47,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:43:47,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:43:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:43:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:43:47,749 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-03 08:43:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:47,921 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:43:47,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:43:47,922 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-03 08:43:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:47,923 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:43:47,923 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:43:47,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:43:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:43:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:43:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:43:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:43:47,927 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-03 08:43:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:47,927 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:43:47,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:43:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:43:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:43:47,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:47,928 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-03 08:43:47,929 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:47,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-03 08:43:47,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:47,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:47,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:47,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:47,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:49,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:49,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:49,134 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:49,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:43:49,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:49,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:49,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:49,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:43:49,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:43:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:43:49,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:43:49,280 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-03 08:43:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:49,402 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:43:49,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:43:49,403 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-03 08:43:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:49,404 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:43:49,404 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:43:49,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:43:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:43:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:43:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:43:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:43:49,409 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-03 08:43:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:49,410 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:43:49,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:43:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:43:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:43:49,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:49,411 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-03 08:43:49,411 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:49,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-03 08:43:49,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:49,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:49,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:49,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:49,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:50,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:50,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:50,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:50,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:50,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:50,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:43:50,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:43:50,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:43:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:43:50,981 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-03 08:43:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:51,107 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:43:51,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:43:51,108 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-03 08:43:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:51,109 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:43:51,109 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:43:51,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:43:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:43:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:43:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:43:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:43:51,113 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-03 08:43:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:51,114 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:43:51,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:43:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:43:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:43:51,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:51,114 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-03 08:43:51,115 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:51,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-03 08:43:51,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:51,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:51,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:51,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:51,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:52,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:52,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:52,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:52,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:52,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:52,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:52,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:52,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:43:52,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:43:52,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:43:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:43:52,375 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-03 08:43:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:52,561 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:43:52,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:43:52,562 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-03 08:43:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:52,563 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:43:52,563 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:43:52,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:43:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:43:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:43:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:43:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:43:52,567 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-03 08:43:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:52,567 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:43:52,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:43:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:43:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:43:52,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:52,569 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-03 08:43:52,569 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:52,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-03 08:43:52,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:52,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:52,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:52,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:54,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:54,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:54,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:54,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 08:43:54,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:54,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:54,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:54,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:43:54,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:43:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:43:54,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:43:54,231 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-03 08:43:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:54,357 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:43:54,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:43:54,357 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-03 08:43:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:54,358 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:43:54,359 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:43:54,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:43:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:43:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:43:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:43:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:43:54,363 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-03 08:43:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:54,363 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:43:54,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:43:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:43:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:43:54,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:54,364 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-03 08:43:54,364 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:54,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-03 08:43:54,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:54,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:54,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:54,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:54,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:55,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:55,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:55,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:55,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:55,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:55,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:55,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:55,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:43:55,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:43:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:43:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:43:55,779 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-03 08:43:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:55,904 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:43:55,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:43:55,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-03 08:43:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:55,906 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:43:55,906 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:43:55,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:43:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:43:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:43:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:43:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:43:55,910 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-03 08:43:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:55,911 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:43:55,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:43:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:43:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:43:55,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:55,912 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-03 08:43:55,912 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:55,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:55,912 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-03 08:43:55,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:55,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:55,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:55,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:55,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:57,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:57,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:57,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:57,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-03 08:43:57,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:57,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:57,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:57,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:43:57,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:43:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:43:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:43:57,251 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-03 08:43:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:57,387 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-03 08:43:57,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:43:57,387 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-03 08:43:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:57,388 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:43:57,389 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:43:57,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:43:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:43:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:43:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:43:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-03 08:43:57,392 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-03 08:43:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:57,393 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-03 08:43:57,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:43:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-03 08:43:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:43:57,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:57,393 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-03 08:43:57,393 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:57,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:57,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-03 08:43:57,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:57,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:57,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:57,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:57,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:58,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:58,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:58,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:58,810 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:43:58,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:58,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:58,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:58,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:43:58,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:43:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:43:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:43:58,875 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-03 08:43:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:59,400 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-03 08:43:59,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:43:59,400 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-03 08:43:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:59,401 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:43:59,401 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:43:59,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:43:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:43:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:43:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:43:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-03 08:43:59,405 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-03 08:43:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:59,405 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-03 08:43:59,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:43:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-03 08:43:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:43:59,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:59,406 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-03 08:43:59,406 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:59,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:59,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-03 08:43:59,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:59,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:59,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:59,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:59,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:00,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:00,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:00,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:00,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:00,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:00,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:44:00,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:44:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:44:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:44:00,753 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-03 08:44:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:01,201 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-03 08:44:01,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:44:01,205 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-03 08:44:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:01,206 INFO L225 Difference]: With dead ends: 119 [2018-10-03 08:44:01,206 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:44:01,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:44:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:44:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 08:44:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 08:44:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-03 08:44:01,209 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-03 08:44:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:01,210 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-03 08:44:01,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:44:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-03 08:44:01,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 08:44:01,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:01,211 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-03 08:44:01,211 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:01,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:01,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-03 08:44:01,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:01,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:01,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:01,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:01,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:02,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:02,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:02,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:02,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:02,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:02,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:02,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:02,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:44:02,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:44:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:44:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:44:02,680 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-03 08:44:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:03,225 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-03 08:44:03,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:44:03,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-03 08:44:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:03,227 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:44:03,227 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:44:03,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:44:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:44:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 08:44:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:44:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-03 08:44:03,230 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-03 08:44:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:03,230 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-03 08:44:03,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:44:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-03 08:44:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:44:03,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:03,231 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-03 08:44:03,231 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:03,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-03 08:44:03,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:03,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:03,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:03,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:03,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:04,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:04,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:04,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:04,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-03 08:44:04,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:04,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:04,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:04,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:44:04,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:44:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:44:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:44:04,896 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-03 08:44:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:05,123 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-03 08:44:05,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:44:05,124 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-03 08:44:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:05,125 INFO L225 Difference]: With dead ends: 123 [2018-10-03 08:44:05,125 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:44:05,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:44:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:44:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:44:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:44:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-03 08:44:05,128 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-03 08:44:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:05,128 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-03 08:44:05,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:44:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-03 08:44:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 08:44:05,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:05,129 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-03 08:44:05,130 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:05,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-03 08:44:05,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:05,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:05,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:05,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:05,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:06,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:06,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:06,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:06,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:06,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:06,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:06,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:06,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:44:06,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:44:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:44:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:44:06,973 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-03 08:44:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:08,259 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-03 08:44:08,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:44:08,260 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-03 08:44:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:08,260 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:44:08,260 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:44:08,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:44:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:44:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-03 08:44:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:44:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-03 08:44:08,265 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-03 08:44:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:08,265 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-03 08:44:08,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:44:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-03 08:44:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:44:08,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:08,266 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-03 08:44:08,266 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:08,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:08,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-03 08:44:08,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:08,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:08,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:08,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:09,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:09,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:09,803 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:09,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-03 08:44:09,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:09,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:10,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:10,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:44:10,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:44:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:44:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:44:10,001 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-03 08:44:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:10,232 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-03 08:44:10,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:44:10,233 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-03 08:44:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:10,233 INFO L225 Difference]: With dead ends: 127 [2018-10-03 08:44:10,233 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:44:10,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:44:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:44:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 08:44:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:44:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-03 08:44:10,237 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-03 08:44:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:10,237 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-03 08:44:10,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:44:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-03 08:44:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 08:44:10,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:10,238 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-03 08:44:10,239 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:10,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-03 08:44:10,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:10,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:10,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:10,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:10,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:12,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:12,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:12,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:12,232 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-03 08:44:12,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:12,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:12,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:12,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:44:12,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:44:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:44:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:44:12,300 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-03 08:44:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:12,702 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-03 08:44:12,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:44:12,702 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-03 08:44:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:12,703 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:44:12,704 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:44:12,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:44:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:44:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 08:44:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:44:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-03 08:44:12,708 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-03 08:44:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:12,708 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-03 08:44:12,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:44:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-03 08:44:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:44:12,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:12,710 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-03 08:44:12,710 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:12,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-03 08:44:12,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:12,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:12,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:12,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:12,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:14,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:14,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:14,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:14,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:14,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:14,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:44:14,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:44:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:44:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:44:14,335 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-03 08:44:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:14,510 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-03 08:44:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:44:14,511 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-03 08:44:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:14,512 INFO L225 Difference]: With dead ends: 131 [2018-10-03 08:44:14,512 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:44:14,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:44:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:44:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 08:44:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:44:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-03 08:44:14,515 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-03 08:44:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:14,515 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-03 08:44:14,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:44:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-03 08:44:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:44:14,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:14,516 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-03 08:44:14,516 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:14,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:14,516 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-03 08:44:14,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:14,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:14,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:14,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:14,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:16,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:16,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:16,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:16,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:16,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:16,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:16,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:16,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:44:16,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:44:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:44:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:44:16,312 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-03 08:44:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:16,415 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-03 08:44:16,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:44:16,415 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-03 08:44:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:16,416 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:44:16,416 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:44:16,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:44:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:44:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:44:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:44:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-03 08:44:16,420 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-03 08:44:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:16,420 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-03 08:44:16,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:44:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-03 08:44:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:44:16,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:16,421 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-03 08:44:16,421 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:16,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-03 08:44:16,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:16,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:16,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:16,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:16,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:18,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:18,004 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) [2018-10-03 08:44:18,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:18,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-03 08:44:18,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:18,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:18,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:18,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:44:18,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:44:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:44:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:44:18,220 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-03 08:44:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:18,363 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-03 08:44:18,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:44:18,364 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-03 08:44:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:18,364 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:44:18,364 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:44:18,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:44:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:44:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 08:44:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:44:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-03 08:44:18,368 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-03 08:44:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:18,368 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-03 08:44:18,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:44:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-03 08:44:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:44:18,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:18,369 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-03 08:44:18,369 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:18,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-03 08:44:18,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:18,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:18,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:20,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:20,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:20,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:20,280 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:20,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:20,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:20,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:20,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:44:20,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:44:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:44:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:44:20,327 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-03 08:44:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:20,436 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-03 08:44:20,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:44:20,437 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-03 08:44:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:20,438 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:44:20,438 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:44:20,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:44:20,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:44:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-03 08:44:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:44:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-03 08:44:20,442 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-03 08:44:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:20,442 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-03 08:44:20,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:44:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-03 08:44:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:44:20,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:20,443 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-03 08:44:20,443 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:20,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:20,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-03 08:44:20,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:20,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:20,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:20,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:20,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:22,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:22,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:22,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:22,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-03 08:44:22,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:22,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:22,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:22,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:44:22,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:44:22,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:44:22,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:44:22,583 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-03 08:44:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:22,685 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-03 08:44:22,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:44:22,685 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-03 08:44:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:22,686 INFO L225 Difference]: With dead ends: 139 [2018-10-03 08:44:22,686 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:44:22,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:44:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:44:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 08:44:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 08:44:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-03 08:44:22,690 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-03 08:44:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:22,691 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-03 08:44:22,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:44:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-03 08:44:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 08:44:22,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:22,692 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-03 08:44:22,692 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:22,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:22,692 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-03 08:44:22,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:22,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:22,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:22,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:22,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:24,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:24,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:24,420 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:24,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-03 08:44:24,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:24,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:24,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:24,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:44:24,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:44:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:44:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:44:24,650 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-03 08:44:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:24,827 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-03 08:44:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:44:24,827 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-03 08:44:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:24,828 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:44:24,828 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:44:24,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:44:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:44:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 08:44:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:44:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-03 08:44:24,834 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-03 08:44:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:24,834 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-03 08:44:24,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:44:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-03 08:44:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:44:24,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:24,835 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-03 08:44:24,835 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:24,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-03 08:44:24,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:24,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:24,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:24,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:26,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:26,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:26,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:26,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:26,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:26,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:44:26,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:44:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:44:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:44:26,998 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-03 08:44:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:27,125 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-03 08:44:27,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:44:27,126 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-03 08:44:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:27,126 INFO L225 Difference]: With dead ends: 143 [2018-10-03 08:44:27,126 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:44:27,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:44:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:44:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:44:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:44:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-03 08:44:27,130 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-03 08:44:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:27,130 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-03 08:44:27,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:44:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-03 08:44:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 08:44:27,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:27,131 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-03 08:44:27,131 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:27,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-03 08:44:27,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:27,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:27,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:27,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:27,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:29,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:29,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:29,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:29,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:29,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:29,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:29,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:29,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:44:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:44:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:44:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:44:29,288 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-03 08:44:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:29,399 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-03 08:44:29,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:44:29,400 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-03 08:44:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:29,401 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:44:29,401 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:44:29,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:44:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:44:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 08:44:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:44:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-03 08:44:29,404 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-03 08:44:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:29,404 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-03 08:44:29,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:44:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-03 08:44:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:44:29,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:29,405 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-03 08:44:29,405 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:29,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-03 08:44:29,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:29,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:29,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:29,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:29,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:31,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:31,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:31,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:31,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 08:44:31,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:31,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:31,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:31,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:44:31,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:44:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:44:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:44:31,590 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-03 08:44:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:31,989 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-03 08:44:31,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:44:31,989 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-03 08:44:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:31,990 INFO L225 Difference]: With dead ends: 147 [2018-10-03 08:44:31,990 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 08:44:31,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:44:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 08:44:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 08:44:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:44:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-03 08:44:31,994 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-03 08:44:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:31,994 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-03 08:44:31,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:44:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-03 08:44:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 08:44:31,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:31,995 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-03 08:44:31,995 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:31,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-03 08:44:31,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:31,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:31,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:31,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:31,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:33,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:33,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:33,883 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:33,994 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:33,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:33,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:34,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:34,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:44:34,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:44:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:44:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:44:34,063 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-03 08:44:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:34,284 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-03 08:44:34,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:44:34,285 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-03 08:44:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:34,285 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:44:34,286 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:44:34,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:44:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:44:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-03 08:44:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:44:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-03 08:44:34,290 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-03 08:44:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:34,290 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-03 08:44:34,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:44:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-03 08:44:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:44:34,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:34,292 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-03 08:44:34,292 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:34,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-03 08:44:34,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:34,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:34,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:34,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:34,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:36,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:36,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:36,225 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:36,414 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-03 08:44:36,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:36,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:36,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:36,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:44:36,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:44:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:44:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:44:36,476 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-03 08:44:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:36,702 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-03 08:44:36,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:44:36,702 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-03 08:44:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:36,703 INFO L225 Difference]: With dead ends: 151 [2018-10-03 08:44:36,703 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:44:36,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:44:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:44:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 08:44:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:44:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-03 08:44:36,707 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-03 08:44:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:36,708 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-03 08:44:36,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:44:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-03 08:44:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:44:36,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:36,709 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-03 08:44:36,709 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:36,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-03 08:44:36,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:36,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:36,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:38,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:38,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:38,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:39,038 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-03 08:44:39,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:39,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:39,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:39,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:44:39,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:44:39,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:44:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:44:39,096 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-03 08:44:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:39,240 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-03 08:44:39,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:44:39,241 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-03 08:44:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:39,242 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:44:39,243 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:44:39,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:44:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:44:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:44:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:44:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-03 08:44:39,248 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-03 08:44:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:39,248 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-03 08:44:39,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:44:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-03 08:44:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:44:39,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:39,249 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-03 08:44:39,249 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:39,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-03 08:44:39,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:39,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:39,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:39,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:39,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:41,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:41,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:41,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:41,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:41,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:41,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:44:41,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:44:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:44:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:44:41,595 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-03 08:44:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:41,821 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-03 08:44:41,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:44:41,822 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-03 08:44:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:41,823 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:44:41,823 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:44:41,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:44:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:44:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 08:44:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 08:44:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-03 08:44:41,828 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-03 08:44:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:41,829 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-03 08:44:41,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:44:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-03 08:44:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:44:41,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:41,830 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-03 08:44:41,830 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:41,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-03 08:44:41,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:41,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:41,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:41,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:41,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:43,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:43,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:43,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:44,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:44,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:44,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:44,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:44,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:44:44,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:44:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:44:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:44:44,162 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-03 08:44:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:44,379 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-03 08:44:44,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:44:44,379 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-03 08:44:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:44,380 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:44:44,380 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:44:44,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:44:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:44:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 08:44:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:44:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-03 08:44:44,384 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-03 08:44:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:44,384 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-03 08:44:44,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:44:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-03 08:44:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:44:44,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:44,385 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-03 08:44:44,385 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:44,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-03 08:44:44,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:44,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:44,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:44,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:44,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:46,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:46,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:46,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:46,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-03 08:44:46,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:46,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:46,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:46,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:44:46,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:44:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:44:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:44:46,785 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-03 08:44:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:47,032 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-03 08:44:47,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:44:47,032 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-03 08:44:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:47,033 INFO L225 Difference]: With dead ends: 159 [2018-10-03 08:44:47,033 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 08:44:47,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:44:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 08:44:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 08:44:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:44:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-03 08:44:47,036 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-03 08:44:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:47,036 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-03 08:44:47,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:44:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-03 08:44:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:44:47,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:47,037 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-03 08:44:47,037 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:47,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-03 08:44:47,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:47,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:47,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:49,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:49,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:49,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:49,364 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:49,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:49,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:49,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:49,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:44:49,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:44:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:44:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:44:49,418 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-03 08:44:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:49,645 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-03 08:44:49,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:44:49,645 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-03 08:44:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:49,646 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:44:49,646 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:44:49,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:44:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:44:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-03 08:44:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:44:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-03 08:44:49,649 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-03 08:44:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:49,649 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-03 08:44:49,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:44:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-03 08:44:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:44:49,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:49,650 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-03 08:44:49,650 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:49,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-03 08:44:49,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:49,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:49,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:49,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:49,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:51,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:51,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:51,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:52,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-03 08:44:52,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:52,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:52,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:52,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:44:52,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:44:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:44:52,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:44:52,234 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-03 08:44:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:52,751 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-03 08:44:52,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:44:52,751 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-03 08:44:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:52,752 INFO L225 Difference]: With dead ends: 163 [2018-10-03 08:44:52,752 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:44:52,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:44:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:44:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:44:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:44:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-03 08:44:52,757 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-03 08:44:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:52,757 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-03 08:44:52,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:44:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-03 08:44:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:44:52,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:52,758 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-03 08:44:52,758 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:52,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-03 08:44:52,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:52,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:52,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:52,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:52,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:55,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:55,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:55,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:55,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-03 08:44:55,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:55,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:55,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:55,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:44:55,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:44:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:44:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:44:55,502 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-03 08:44:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:55,644 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-03 08:44:55,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:44:55,645 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-03 08:44:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:55,646 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:44:55,646 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:44:55,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:44:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:44:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 08:44:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:44:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-03 08:44:55,650 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-03 08:44:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:55,650 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-03 08:44:55,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:44:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-03 08:44:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:44:55,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:55,651 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-03 08:44:55,652 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:55,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-03 08:44:55,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:55,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:55,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:55,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:55,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:58,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:58,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:58,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:58,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:58,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:58,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:44:58,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:44:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:44:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:44:58,527 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-03 08:44:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:58,775 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-03 08:44:58,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:44:58,776 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-03 08:44:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:58,776 INFO L225 Difference]: With dead ends: 167 [2018-10-03 08:44:58,776 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 08:44:58,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:44:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 08:44:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 08:44:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:44:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-03 08:44:58,780 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-03 08:44:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:58,781 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-03 08:44:58,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:44:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-03 08:44:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 08:44:58,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:58,782 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-03 08:44:58,782 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:58,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:58,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-03 08:44:58,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:58,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:58,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:58,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:58,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:01,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:01,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:45:01,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:01,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:01,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:01,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:01,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:01,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:45:01,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:45:01,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:45:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:45:01,412 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-03 08:45:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:01,572 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-03 08:45:01,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:45:01,572 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-03 08:45:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:01,573 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:45:01,573 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:45:01,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:45:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:45:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 08:45:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:45:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-03 08:45:01,576 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-03 08:45:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:01,576 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-03 08:45:01,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:45:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-03 08:45:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:45:01,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:01,577 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-03 08:45:01,577 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:01,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:01,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-03 08:45:01,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:01,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:01,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:04,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:04,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:45:04,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:04,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-03 08:45:04,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:04,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:04,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:04,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:45:04,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:45:04,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:45:04,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:45:04,615 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-03 08:45:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:04,813 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-03 08:45:04,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:45:04,814 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-03 08:45:04,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:04,814 INFO L225 Difference]: With dead ends: 171 [2018-10-03 08:45:04,814 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 08:45:04,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:45:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 08:45:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 08:45:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 08:45:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-03 08:45:04,818 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-03 08:45:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:04,819 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-03 08:45:04,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:45:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-03 08:45:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:45:04,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:04,819 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-03 08:45:04,820 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:04,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-03 08:45:04,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:04,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:04,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:04,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:04,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:07,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:07,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:07,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:07,846 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:07,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:07,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:07,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:07,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:45:07,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:45:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:45:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:45:07,922 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-03 08:45:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:08,190 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-03 08:45:08,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:45:08,190 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-03 08:45:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:08,191 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:45:08,191 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:45:08,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:45:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:45:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:45:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:45:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-03 08:45:08,194 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-03 08:45:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:08,194 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-03 08:45:08,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:45:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-03 08:45:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:45:08,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:08,195 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-03 08:45:08,195 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:08,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-03 08:45:08,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:08,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:08,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:08,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:08,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:10,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:10,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:10,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:11,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-03 08:45:11,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:11,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:11,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:11,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:45:11,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:45:11,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:45:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:45:11,262 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-03 08:45:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:11,540 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-03 08:45:11,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:45:11,540 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-03 08:45:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:11,541 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:45:11,541 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:45:11,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:45:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:45:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 08:45:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 08:45:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-03 08:45:11,545 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-03 08:45:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:11,545 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-03 08:45:11,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:45:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-03 08:45:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 08:45:11,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:11,547 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-03 08:45:11,547 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:11,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-03 08:45:11,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:11,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:11,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:14,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:14,479 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 [2018-10-03 08:45:14,486 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:14,711 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-03 08:45:14,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:14,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:14,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:14,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:45:14,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:45:14,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:45:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:45:14,769 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-03 08:45:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:15,223 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-03 08:45:15,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:45:15,223 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-03 08:45:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:15,224 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:45:15,224 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:45:15,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:45:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:45:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 08:45:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:45:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-03 08:45:15,229 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-03 08:45:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:15,229 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-03 08:45:15,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:45:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-03 08:45:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:45:15,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:15,230 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-03 08:45:15,230 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:15,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:15,231 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-03 08:45:15,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:15,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:15,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:15,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:15,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:18,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:18,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:18,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:18,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:18,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:18,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:45:18,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:45:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:45:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:45:18,510 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-03 08:45:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:18,795 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-03 08:45:18,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:45:18,795 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-03 08:45:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:18,796 INFO L225 Difference]: With dead ends: 179 [2018-10-03 08:45:18,796 INFO L226 Difference]: Without dead ends: 177 [2018-10-03 08:45:18,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:45:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-03 08:45:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-03 08:45:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-03 08:45:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-03 08:45:18,800 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-03 08:45:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:18,802 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-03 08:45:18,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:45:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-03 08:45:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 08:45:18,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:18,803 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-03 08:45:18,803 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:18,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:18,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-03 08:45:18,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:18,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:18,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:18,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:18,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:21,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:21,656 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 [2018-10-03 08:45:21,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:21,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:21,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:21,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:21,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:21,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:45:21,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:45:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:45:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:45:21,869 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-03 08:45:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:22,041 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-03 08:45:22,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:45:22,042 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-03 08:45:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:22,043 INFO L225 Difference]: With dead ends: 181 [2018-10-03 08:45:22,043 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:45:22,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:45:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:45:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-03 08:45:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:45:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-03 08:45:22,046 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-03 08:45:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:22,046 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-03 08:45:22,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:45:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-03 08:45:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:45:22,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:22,047 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-03 08:45:22,047 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:22,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-03 08:45:22,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:22,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:22,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:22,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:22,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:25,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:25,119 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 [2018-10-03 08:45:25,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:25,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-03 08:45:25,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:25,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:25,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:25,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:45:25,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:45:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:45:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:45:25,437 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-03 08:45:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:25,737 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-03 08:45:25,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:45:25,738 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-03 08:45:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:25,738 INFO L225 Difference]: With dead ends: 183 [2018-10-03 08:45:25,738 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 08:45:25,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:45:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 08:45:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 08:45:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 08:45:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-03 08:45:25,742 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-03 08:45:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:25,742 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-03 08:45:25,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:45:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-03 08:45:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-03 08:45:25,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:25,743 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-03 08:45:25,743 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:25,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:25,743 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-03 08:45:25,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:25,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:25,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:25,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:25,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:28,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:28,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:28,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:29,112 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:29,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:29,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:29,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:29,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:45:29,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:45:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:45:29,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:45:29,172 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-03 08:45:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:29,365 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-03 08:45:29,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:45:29,365 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-03 08:45:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:29,366 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:45:29,367 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:45:29,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:45:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:45:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-03 08:45:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:45:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-03 08:45:29,371 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-03 08:45:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:29,372 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-03 08:45:29,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:45:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-03 08:45:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:45:29,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:29,372 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-03 08:45:29,373 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:29,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-03 08:45:29,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:29,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:29,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:29,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:29,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:32,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:32,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:32,384 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:32,635 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-03 08:45:32,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:32,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:32,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:32,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:45:32,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:45:32,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:45:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:45:32,695 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-03 08:45:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:33,022 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-03 08:45:33,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:45:33,023 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-03 08:45:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:33,024 INFO L225 Difference]: With dead ends: 187 [2018-10-03 08:45:33,024 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 08:45:33,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:45:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 08:45:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 08:45:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:45:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-03 08:45:33,027 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-03 08:45:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:33,027 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-03 08:45:33,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:45:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-03 08:45:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 08:45:33,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:33,028 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-03 08:45:33,028 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:33,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-03 08:45:33,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:33,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:33,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:33,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:36,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:36,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:36,075 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:36,325 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-03 08:45:36,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:36,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:36,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:36,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:45:36,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:45:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:45:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:45:36,388 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-03 08:45:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:36,625 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-03 08:45:36,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:45:36,626 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-03 08:45:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:36,627 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:45:36,627 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:45:36,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:45:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:45:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 08:45:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:45:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-03 08:45:36,632 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-03 08:45:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:36,632 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-03 08:45:36,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:45:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-03 08:45:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:45:36,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:36,633 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-03 08:45:36,634 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:36,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-03 08:45:36,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:36,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:36,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:36,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:36,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:40,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:40,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:40,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:40,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:40,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:40,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:45:40,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:45:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:45:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:45:40,265 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-03 08:45:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:40,455 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-03 08:45:40,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:45:40,456 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-03 08:45:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:40,457 INFO L225 Difference]: With dead ends: 191 [2018-10-03 08:45:40,457 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 08:45:40,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:45:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 08:45:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-03 08:45:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:45:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-03 08:45:40,463 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-03 08:45:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:40,463 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-03 08:45:40,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:45:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-03 08:45:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:45:40,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:40,464 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-03 08:45:40,464 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:40,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-03 08:45:40,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:40,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:40,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:40,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:40,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:43,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:43,929 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 [2018-10-03 08:45:43,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:44,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:44,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:44,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:44,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:44,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:45:44,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:45:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:45:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:45:44,167 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-03 08:45:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:44,347 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-03 08:45:44,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:45:44,348 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-03 08:45:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:44,349 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:45:44,349 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:45:44,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:45:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:45:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:45:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:45:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-03 08:45:44,354 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-03 08:45:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:44,354 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-03 08:45:44,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:45:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-03 08:45:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:45:44,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:44,355 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-03 08:45:44,355 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:44,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-03 08:45:44,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:44,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:44,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:44,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:44,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:48,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:48,256 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 [2018-10-03 08:45:48,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:48,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-03 08:45:48,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:48,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:48,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:48,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:45:48,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:45:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:45:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:45:48,608 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-03 08:45:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:48,813 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-03 08:45:48,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:45:48,813 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-03 08:45:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:48,815 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:45:48,815 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 08:45:48,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:45:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 08:45:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 08:45:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 08:45:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-03 08:45:48,818 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-03 08:45:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:48,818 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-03 08:45:48,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:45:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-03 08:45:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 08:45:48,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:48,819 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-03 08:45:48,819 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:48,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:48,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-03 08:45:48,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:48,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:48,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:48,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:48,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:52,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:52,144 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 [2018-10-03 08:45:52,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:52,302 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:52,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:52,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:52,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:52,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:45:52,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:45:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:45:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:45:52,365 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-03 08:45:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:52,676 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-03 08:45:52,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:45:52,676 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-03 08:45:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:52,677 INFO L225 Difference]: With dead ends: 197 [2018-10-03 08:45:52,677 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:45:52,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:45:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:45:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-03 08:45:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:45:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-03 08:45:52,681 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-03 08:45:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:52,681 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-03 08:45:52,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:45:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-03 08:45:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:45:52,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:52,682 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-03 08:45:52,682 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:52,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-03 08:45:52,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:52,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:52,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:52,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:52,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:56,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:56,398 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) [2018-10-03 08:45:56,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:45:56,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-03 08:45:56,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:56,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:56,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:56,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:45:56,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:45:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:45:56,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:45:56,762 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-03 08:45:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:57,078 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-03 08:45:57,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:45:57,079 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-03 08:45:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:57,079 INFO L225 Difference]: With dead ends: 199 [2018-10-03 08:45:57,080 INFO L226 Difference]: Without dead ends: 197 [2018-10-03 08:45:57,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:45:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-03 08:45:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-03 08:45:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-03 08:45:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-03 08:45:57,084 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-03 08:45:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:57,085 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-03 08:45:57,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:45:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-03 08:45:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-03 08:45:57,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:57,086 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-03 08:45:57,086 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:57,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:57,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-03 08:45:57,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:57,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:57,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:57,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:57,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:00,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:00,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:00,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:46:01,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-03 08:46:01,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:01,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:01,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:01,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:46:01,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:46:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:46:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:46:01,223 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-03 08:46:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:01,434 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-03 08:46:01,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:46:01,435 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-03 08:46:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:01,435 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:46:01,435 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:46:01,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:46:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:46:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 08:46:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:46:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-03 08:46:01,440 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-03 08:46:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:01,440 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-03 08:46:01,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:46:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-03 08:46:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:46:01,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:01,441 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-03 08:46:01,441 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:01,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:01,441 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-03 08:46:01,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:01,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:01,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:01,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:01,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:05,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:05,237 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 [2018-10-03 08:46:05,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:05,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:05,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:05,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:46:05,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:46:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:46:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:46:05,466 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-10-03 08:46:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:05,823 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-03 08:46:05,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:46:05,824 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-03 08:46:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:05,824 INFO L225 Difference]: With dead ends: 203 [2018-10-03 08:46:05,825 INFO L226 Difference]: Without dead ends: 201 [2018-10-03 08:46:05,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:46:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-03 08:46:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-03 08:46:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-03 08:46:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-03 08:46:05,829 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-10-03 08:46:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:05,830 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-03 08:46:05,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:46:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-03 08:46:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 08:46:05,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:05,831 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-10-03 08:46:05,831 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:05,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:05,831 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-10-03 08:46:05,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:05,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:05,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:05,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:05,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:09,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:09,576 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 [2018-10-03 08:46:09,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:46:09,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:46:09,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:09,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:09,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:09,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:46:09,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:46:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:46:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:46:09,824 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-10-03 08:46:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:10,169 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-03 08:46:10,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:46:10,169 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-10-03 08:46:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:10,170 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:46:10,170 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:46:10,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:46:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:46:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-03 08:46:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 08:46:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-03 08:46:10,174 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-10-03 08:46:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:10,174 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-03 08:46:10,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:46:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-03 08:46:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:46:10,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:10,175 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-10-03 08:46:10,175 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:10,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-10-03 08:46:10,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:10,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:10,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:10,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:10,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:13,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:13,784 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 [2018-10-03 08:46:13,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:46:14,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-03 08:46:14,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:14,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:14,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:14,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:46:14,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:46:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:46:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:46:14,169 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-10-03 08:46:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:14,429 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-03 08:46:14,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:46:14,430 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-03 08:46:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:14,431 INFO L225 Difference]: With dead ends: 207 [2018-10-03 08:46:14,431 INFO L226 Difference]: Without dead ends: 205 [2018-10-03 08:46:14,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:46:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-03 08:46:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-03 08:46:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 08:46:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-10-03 08:46:14,434 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-10-03 08:46:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:14,434 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-10-03 08:46:14,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:46:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-10-03 08:46:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-03 08:46:14,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:14,435 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-10-03 08:46:14,435 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:14,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:14,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-10-03 08:46:14,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:14,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:14,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:14,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:14,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:18,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:18,248 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 [2018-10-03 08:46:18,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:46:18,411 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:46:18,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:18,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:18,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:18,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:46:18,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:46:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:46:18,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:46:18,479 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-10-03 08:46:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:18,730 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-03 08:46:18,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:46:18,730 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-10-03 08:46:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:18,731 INFO L225 Difference]: With dead ends: 209 [2018-10-03 08:46:18,732 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 08:46:18,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:46:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 08:46:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-03 08:46:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-03 08:46:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-03 08:46:18,736 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-10-03 08:46:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:18,737 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-03 08:46:18,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:46:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-03 08:46:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 08:46:18,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:18,738 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-10-03 08:46:18,738 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:18,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-10-03 08:46:18,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:18,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:18,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:18,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:18,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:22,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:22,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:22,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:46:23,261 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-03 08:46:23,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:23,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:23,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:23,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:46:23,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:46:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:46:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:46:23,351 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-10-03 08:46:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:23,614 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-03 08:46:23,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:46:23,615 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-10-03 08:46:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:23,616 INFO L225 Difference]: With dead ends: 211 [2018-10-03 08:46:23,616 INFO L226 Difference]: Without dead ends: 209 [2018-10-03 08:46:23,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:46:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-03 08:46:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-03 08:46:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-03 08:46:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-03 08:46:23,620 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-10-03 08:46:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:23,620 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-03 08:46:23,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:46:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-03 08:46:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-03 08:46:23,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:23,621 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-10-03 08:46:23,621 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:23,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-10-03 08:46:23,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:23,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:23,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:23,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:23,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:27,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:27,949 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 [2018-10-03 08:46:27,956 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:46:28,278 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-03 08:46:28,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:28,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:28,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:28,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:46:28,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:46:28,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:46:28,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:46:28,348 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-10-03 08:46:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:28,663 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-03 08:46:28,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:46:28,663 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-10-03 08:46:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:28,664 INFO L225 Difference]: With dead ends: 213 [2018-10-03 08:46:28,664 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:46:28,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:46:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:46:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 08:46:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 08:46:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-03 08:46:28,668 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-10-03 08:46:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:28,668 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-03 08:46:28,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:46:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-03 08:46:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-03 08:46:28,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:28,670 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-10-03 08:46:28,670 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:28,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-10-03 08:46:28,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:28,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:28,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:28,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:28,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:32,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:32,985 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 [2018-10-03 08:46:32,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:33,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:33,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:33,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:46:33,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:46:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:46:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:46:33,248 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-10-03 08:46:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:33,732 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-10-03 08:46:33,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:46:33,733 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-10-03 08:46:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:33,733 INFO L225 Difference]: With dead ends: 215 [2018-10-03 08:46:33,734 INFO L226 Difference]: Without dead ends: 213 [2018-10-03 08:46:33,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:46:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-03 08:46:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-03 08:46:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-03 08:46:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-03 08:46:33,738 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-10-03 08:46:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:33,738 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-03 08:46:33,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:46:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-03 08:46:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-03 08:46:33,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:33,739 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-10-03 08:46:33,740 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:33,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:33,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-10-03 08:46:33,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:33,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:33,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:33,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:33,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:38,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:38,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:38,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:46:38,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:46:38,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:38,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:38,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:38,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:46:38,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:46:38,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:46:38,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:46:38,282 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-10-03 08:46:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:38,539 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-03 08:46:38,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:46:38,540 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-10-03 08:46:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:38,541 INFO L225 Difference]: With dead ends: 217 [2018-10-03 08:46:38,541 INFO L226 Difference]: Without dead ends: 215 [2018-10-03 08:46:38,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:46:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-03 08:46:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-03 08:46:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-03 08:46:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-03 08:46:38,545 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-10-03 08:46:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:38,546 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-03 08:46:38,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:46:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-03 08:46:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-03 08:46:38,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:38,547 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-10-03 08:46:38,547 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:38,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-10-03 08:46:38,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:38,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:38,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:43,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:43,020 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 [2018-10-03 08:46:43,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:46:43,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-03 08:46:43,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:43,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:43,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:43,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:46:43,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:46:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:46:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:46:43,459 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-10-03 08:46:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:43,858 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-03 08:46:43,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:46:43,858 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-10-03 08:46:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:43,859 INFO L225 Difference]: With dead ends: 219 [2018-10-03 08:46:43,859 INFO L226 Difference]: Without dead ends: 217 [2018-10-03 08:46:43,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:46:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-03 08:46:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-03 08:46:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-03 08:46:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-10-03 08:46:43,864 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-10-03 08:46:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:43,864 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-10-03 08:46:43,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:46:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-10-03 08:46:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-03 08:46:43,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:43,865 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-10-03 08:46:43,865 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:43,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-10-03 08:46:43,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:43,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:43,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:43,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:43,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:48,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:48,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:48,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:46:48,594 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:46:48,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:48,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:48,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:48,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:46:48,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:46:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:46:48,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:46:48,665 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-10-03 08:46:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:48,976 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-03 08:46:48,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:46:48,976 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-10-03 08:46:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:48,977 INFO L225 Difference]: With dead ends: 221 [2018-10-03 08:46:48,977 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 08:46:48,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:46:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 08:46:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-03 08:46:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-03 08:46:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-03 08:46:48,981 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-10-03 08:46:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:48,981 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-03 08:46:48,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:46:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-03 08:46:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:46:48,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:48,982 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-10-03 08:46:48,982 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:48,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:48,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-10-03 08:46:48,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:48,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:48,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:48,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:48,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:53,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:53,564 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 [2018-10-03 08:46:53,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:46:53,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-03 08:46:53,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:53,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:53,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:53,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:46:53,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:46:53,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:46:53,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:46:53,983 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-10-03 08:46:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:54,355 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-03 08:46:54,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:46:54,355 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-10-03 08:46:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:54,356 INFO L225 Difference]: With dead ends: 223 [2018-10-03 08:46:54,356 INFO L226 Difference]: Without dead ends: 221 [2018-10-03 08:46:54,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:46:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-03 08:46:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-03 08:46:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-03 08:46:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-03 08:46:54,362 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-10-03 08:46:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:54,362 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-03 08:46:54,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:46:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-03 08:46:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-03 08:46:54,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:54,363 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-10-03 08:46:54,363 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:54,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-10-03 08:46:54,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:54,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:54,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:54,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:54,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:46:55,239 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:46:55,243 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:46:55,243 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:46:55 BoogieIcfgContainer [2018-10-03 08:46:55,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:46:55,244 INFO L168 Benchmark]: Toolchain (without parser) took 233296.76 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 338.7 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 41.9 kB). Peak memory consumption was 338.7 MB. Max. memory is 7.1 GB. [2018-10-03 08:46:55,245 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:46:55,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:46:55,246 INFO L168 Benchmark]: Boogie Preprocessor took 24.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:46:55,246 INFO L168 Benchmark]: RCFGBuilder took 324.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:46:55,246 INFO L168 Benchmark]: TraceAbstraction took 232895.94 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 338.7 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -21.1 MB). Peak memory consumption was 317.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:46:55,248 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 324.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232895.94 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 338.7 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -21.1 MB). Peak memory consumption was 317.6 MB. 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 analyzing trace of length 221 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 219 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 232.8s OverallTime, 109 OverallIterations, 109 TraceHistogramMax, 22.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 432 SDtfs, 0 SDslu, 9493 SDs, 0 SdLazy, 9601 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17871 GetRequests, 11985 SyntacticMatches, 0 SemanticMatches, 5886 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=108, 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, 108 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 16.6s SatisfiabilityAnalysisTime, 184.9s InterpolantComputationTime, 23972 NumberOfCodeBlocks, 23972 NumberOfCodeBlocksAsserted, 3149 NumberOfCheckSat, 23757 ConstructedInterpolants, 0 QuantifiedInterpolants, 10312467 SizeOfPredicates, 320 NumberOfNonLiveVariables, 70941 ConjunctsInSsa, 6523 ConjunctsInUnsatCore, 215 InterpolantComputations, 1 PerfectInterpolantSequences, 0/839736 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.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-46-55-256.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-46-55-256.csv Completed graceful shutdown