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/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:32:40,424 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:32:40,429 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:32:40,446 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 23:32:40,495 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:32:40,527 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:32:40,527 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:32:40,528 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:32:40,528 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:32:40,529 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:32:40,529 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:32:40,529 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:32:40,530 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:32:40,530 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:32:40,530 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:32:40,530 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:32:40,530 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:32:40,531 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:32:40,531 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:32:40,531 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:32:40,531 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:32:40,531 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:32:40,531 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:32:40,532 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:32:40,532 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:32:40,532 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:32:40,532 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:32:40,532 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:32:40,533 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:32:40,533 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:32:40,533 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:32:40,533 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:32:40,533 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:32:40,534 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:32:40,534 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:32:40,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:32:40,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:32:40,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:32:40,598 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:32:40,599 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:32:40,600 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-30 23:32:40,600 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-30 23:32:40,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:32:40,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:32:40,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:32:40,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:32:40,677 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:32:40,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:32:40,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:32:40,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:32:40,718 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:32:40,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... [2018-09-30 23:32:40,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:32:40,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:32:40,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:32:40,741 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:32:40,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:32:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:32:40,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:32:41,126 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:32:41,127 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:32:41 BoogieIcfgContainer [2018-09-30 23:32:41,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:32:41,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:32:41,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:32:41,133 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:32:41,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:32:40" (1/2) ... [2018-09-30 23:32:41,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149d2bb and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:32:41, skipping insertion in model container [2018-09-30 23:32:41,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:32:41" (2/2) ... [2018-09-30 23:32:41,138 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-30 23:32:41,150 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:32:41,162 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:32:41,217 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:32:41,218 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:32:41,218 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:32:41,218 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:32:41,219 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:32:41,219 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:32:41,219 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:32:41,219 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:32:41,219 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:32:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 23:32:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:32:41,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:41,259 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:32:41,262 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:41,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-30 23:32:41,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:41,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:41,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:41,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:41,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:41,594 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:32:41,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:32:41,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:32:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:32:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:32:41,621 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-30 23:32:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:41,906 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 23:32:41,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:32:41,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:32:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:41,919 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:32:41,919 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:32:41,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:32:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:32:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-30 23:32:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:32:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 23:32:41,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-30 23:32:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:41,960 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 23:32:41,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:32:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 23:32:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:32:41,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:41,961 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:32:41,962 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:41,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-30 23:32:41,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:41,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:41,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:41,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:41,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:42,023 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:32:42,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:32:42,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:32:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:32:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:32:42,026 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-30 23:32:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:42,105 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 23:32:42,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:32:42,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 23:32:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:42,107 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:32:42,107 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:32:42,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:32:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:32:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:32:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:32:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 23:32:42,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 23:32:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:42,112 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 23:32:42,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:32:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 23:32:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:32:42,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:42,114 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:32:42,114 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:42,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:42,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-30 23:32:42,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:42,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:42,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:42,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:42,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:42,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:42,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:42,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:42,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:42,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:42,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 23:32:42,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:32:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:32:42,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:32:42,755 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-30 23:32:43,273 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 23:32:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:43,391 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-30 23:32:43,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:32:43,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 23:32:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:43,393 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:32:43,393 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:32:43,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:32:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:32:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:32:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:32:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 23:32:43,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-30 23:32:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:43,401 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 23:32:43,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:32:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 23:32:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:32:43,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:43,402 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 23:32:43,402 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:43,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-30 23:32:43,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:43,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:43,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:43,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:43,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:43,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:43,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:43,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:43,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:43,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:43,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:44,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:44,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 23:32:44,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:32:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:32:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:32:44,069 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-30 23:32:44,339 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-09-30 23:32:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:44,532 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-30 23:32:44,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:32:44,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-30 23:32:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:44,534 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:32:44,535 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:32:44,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:32:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:32:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:32:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:32:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 23:32:44,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-30 23:32:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:44,542 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 23:32:44,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:32:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 23:32:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:32:44,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:44,543 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-30 23:32:44,544 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:44,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-30 23:32:44,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:44,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:44,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:44,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:44,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:44,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:44,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:44,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:44,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:32:44,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:44,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:44,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:44,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-30 23:32:44,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:32:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:32:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:32:44,843 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-30 23:32:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:45,036 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-30 23:32:45,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:32:45,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 23:32:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:45,037 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:32:45,037 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:32:45,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:32:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:32:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:32:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:32:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 23:32:45,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-30 23:32:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:45,049 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 23:32:45,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:32:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 23:32:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:32:45,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:45,050 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-30 23:32:45,050 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:45,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:45,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-30 23:32:45,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:45,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:45,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:45,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:45,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:45,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:45,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:45,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:45,249 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:45,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:45,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:45,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:45,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-30 23:32:45,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:32:45,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:32:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:32:45,336 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-30 23:32:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:45,468 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-30 23:32:45,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:32:45,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-30 23:32:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:45,472 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:32:45,472 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:32:45,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:32:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:32:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-30 23:32:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:32:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 23:32:45,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-30 23:32:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:45,479 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 23:32:45,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:32:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 23:32:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:32:45,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:45,481 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-30 23:32:45,481 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:45,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-30 23:32:45,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:45,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:45,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:45,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:45,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:45,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:45,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:45,691 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:45,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:32:45,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:45,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:45,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:45,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 23:32:45,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:32:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:32:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:32:45,918 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-30 23:32:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:46,085 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 23:32:46,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:32:46,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-30 23:32:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:46,087 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:32:46,088 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:32:46,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:32:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:32:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:32:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:32:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 23:32:46,095 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-30 23:32:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:46,096 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 23:32:46,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:32:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 23:32:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:32:46,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:46,097 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-30 23:32:46,097 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:46,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-30 23:32:46,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:46,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:46,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:46,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:46,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:46,307 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:46,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 23:32:46,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:46,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:46,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-30 23:32:46,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:32:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:32:46,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:32:46,492 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-30 23:32:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:46,674 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-30 23:32:46,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:32:46,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-30 23:32:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:46,676 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:32:46,676 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:32:46,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:32:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:32:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:32:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:32:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 23:32:46,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-30 23:32:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:46,684 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 23:32:46,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:32:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 23:32:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:32:46,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:46,686 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-30 23:32:46,686 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:46,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-30 23:32:46,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:46,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:46,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:46,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:46,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:46,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:46,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:47,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:47,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-30 23:32:47,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:32:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:32:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:32:47,145 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-30 23:32:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:47,388 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 23:32:47,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:32:47,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-30 23:32:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:47,391 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:32:47,392 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:32:47,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:32:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:32:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-30 23:32:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:32:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 23:32:47,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-30 23:32:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:47,400 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 23:32:47,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:32:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 23:32:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:32:47,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:47,401 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-30 23:32:47,401 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:47,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-30 23:32:47,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:47,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:47,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:47,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:47,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:47,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:47,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:47,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:47,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:47,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:47,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:32:48,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:48,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-30 23:32:48,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:32:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:32:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:32:48,067 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-30 23:32:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:48,662 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 23:32:48,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:32:48,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-30 23:32:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:48,666 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:32:48,667 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:32:48,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:32:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:32:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:32:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:32:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 23:32:48,675 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-30 23:32:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:48,675 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 23:32:48,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:32:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 23:32:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:32:48,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:48,676 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-30 23:32:48,676 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:48,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-30 23:32:48,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:48,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:48,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:48,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:48,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:48,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:48,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:48,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:49,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:32:49,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:49,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:49,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:49,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-30 23:32:49,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:32:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:32:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:32:49,464 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-30 23:32:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:49,796 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-30 23:32:49,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:32:49,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-30 23:32:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:49,797 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:32:49,798 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:32:49,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:32:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:32:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:32:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:32:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 23:32:49,808 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-30 23:32:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:49,808 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 23:32:49,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:32:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 23:32:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:32:49,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:49,809 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-30 23:32:49,809 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:49,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-30 23:32:49,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:49,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:49,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:49,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:49,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:49,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:49,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:50,006 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:50,036 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:50,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:50,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:50,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:50,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-30 23:32:50,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:32:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:32:50,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:32:50,086 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-30 23:32:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:50,254 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 23:32:50,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:32:50,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-30 23:32:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:50,256 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:32:50,256 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:32:50,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:32:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:32:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-30 23:32:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:32:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 23:32:50,264 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-30 23:32:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:50,264 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 23:32:50,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:32:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 23:32:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:32:50,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:50,265 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-30 23:32:50,265 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:50,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-30 23:32:50,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:50,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:50,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:50,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:50,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:50,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:50,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:50,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:50,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:32:50,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:50,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:50,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:50,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 23:32:50,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:32:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:32:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:32:50,966 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-30 23:32:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:51,321 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 23:32:51,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:32:51,322 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-30 23:32:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:51,323 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:32:51,323 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:32:51,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:32:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:32:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:32:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:32:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 23:32:51,330 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-30 23:32:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:51,331 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 23:32:51,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:32:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 23:32:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:32:51,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:51,332 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-30 23:32:51,332 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:51,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-30 23:32:51,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:51,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:51,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:51,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:51,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:52,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:52,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:52,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:52,304 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:32:52,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:52,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:52,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:52,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-30 23:32:52,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:32:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:32:52,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:32:52,543 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-30 23:32:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:52,961 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-30 23:32:52,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:32:52,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-30 23:32:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:52,963 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:32:52,963 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:32:52,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:32:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:32:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:32:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:32:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 23:32:52,970 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-30 23:32:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:52,971 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 23:32:52,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:32:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 23:32:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:32:52,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:52,972 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-30 23:32:52,972 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:52,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-30 23:32:52,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:52,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:52,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:52,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:52,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:53,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:53,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:53,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:53,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:53,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:53,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-30 23:32:53,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:32:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:32:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:32:53,273 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-30 23:32:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:53,459 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-30 23:32:53,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:32:53,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 23:32:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:53,461 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:32:53,461 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:32:53,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:32:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:32:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-30 23:32:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:32:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 23:32:53,472 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-30 23:32:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:53,472 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 23:32:53,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:32:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 23:32:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:32:53,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:53,474 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-30 23:32:53,474 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:53,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-30 23:32:53,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:53,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:53,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:53,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:53,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:54,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:54,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:54,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:54,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:54,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:54,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:32:55,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:55,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-30 23:32:55,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:32:55,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:32:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:32:55,154 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-30 23:32:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:55,416 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 23:32:55,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:32:55,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-30 23:32:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:55,417 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:32:55,418 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:32:55,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:32:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:32:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:32:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:32:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 23:32:55,427 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-30 23:32:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:55,428 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 23:32:55,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:32:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 23:32:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:32:55,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:55,429 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-30 23:32:55,429 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:55,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-30 23:32:55,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:55,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:55,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:55,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:55,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:56,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:56,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:56,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:56,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:32:56,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:56,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:56,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:56,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-30 23:32:56,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:32:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:32:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:32:56,918 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-30 23:32:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:57,163 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-30 23:32:57,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:32:57,163 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-30 23:32:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:57,164 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:32:57,164 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:32:57,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:32:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:32:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:32:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:32:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 23:32:57,174 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-30 23:32:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:57,174 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 23:32:57,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:32:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 23:32:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:32:57,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:57,175 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-30 23:32:57,175 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:57,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-30 23:32:57,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:57,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:57,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:57,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:57,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:57,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:57,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:57,481 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:57,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:57,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:57,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:57,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-30 23:32:57,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:32:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:32:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:32:57,547 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-30 23:32:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:57,857 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 23:32:57,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:32:57,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-30 23:32:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:57,858 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:32:57,858 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:32:57,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:32:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:32:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-30 23:32:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:32:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 23:32:57,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-30 23:32:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:57,866 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 23:32:57,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:32:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 23:32:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:32:57,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:57,867 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-30 23:32:57,867 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:57,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-30 23:32:57,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:57,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:57,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:57,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:58,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:58,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:58,657 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:58,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 23:32:58,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:58,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:59,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:59,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 23:32:59,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:32:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:32:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:32:59,461 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-30 23:32:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:59,732 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 23:32:59,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:32:59,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-30 23:32:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:59,733 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:32:59,734 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:32:59,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:32:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:32:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:32:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:32:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 23:32:59,743 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-30 23:32:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:59,744 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 23:32:59,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:32:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 23:32:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:32:59,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:59,745 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-30 23:32:59,745 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:59,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-30 23:32:59,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:59,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:59,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:59,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:59,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:00,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:00,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:00,335 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:00,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 23:33:00,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:00,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:01,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:01,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-30 23:33:01,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:33:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:33:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:33:01,331 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-30 23:33:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:01,633 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-30 23:33:01,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:33:01,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-30 23:33:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:01,634 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:33:01,634 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:33:01,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:33:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:33:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:33:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:33:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 23:33:01,642 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-30 23:33:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:01,643 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 23:33:01,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:33:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 23:33:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:33:01,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:01,644 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-30 23:33:01,644 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:01,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-30 23:33:01,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:01,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:01,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:01,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:01,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:02,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:02,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:02,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:02,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:02,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:02,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-30 23:33:02,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:33:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:33:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:33:02,310 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-30 23:33:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:02,602 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 23:33:02,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:33:02,603 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-30 23:33:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:02,604 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:33:02,604 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:33:02,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:33:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:33:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-30 23:33:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:33:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 23:33:02,613 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-30 23:33:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:02,613 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 23:33:02,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:33:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 23:33:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:33:02,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:02,614 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-30 23:33:02,614 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:02,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-30 23:33:02,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:02,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:02,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:02,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:02,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:03,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:03,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:03,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:03,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:03,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:03,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:33:03,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:03,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-30 23:33:03,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:33:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:33:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1575, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:33:03,507 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-30 23:33:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:03,979 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 23:33:03,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:33:03,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-30 23:33:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:03,980 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:33:03,980 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:33:03,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:33:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:33:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:33:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:33:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 23:33:03,987 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-30 23:33:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:03,987 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 23:33:03,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:33:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 23:33:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:33:03,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:03,988 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-30 23:33:03,988 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:03,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-30 23:33:03,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:03,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:03,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:03,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:03,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:04,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:04,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:04,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:04,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:33:04,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:04,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:05,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:05,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-30 23:33:05,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:33:05,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:33:05,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:33:05,376 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-30 23:33:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:05,766 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-30 23:33:05,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:33:05,766 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-30 23:33:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:05,767 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:33:05,767 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:33:05,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:33:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:33:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:33:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:33:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 23:33:05,776 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-30 23:33:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:05,777 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 23:33:05,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:33:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 23:33:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:33:05,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:05,778 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-30 23:33:05,778 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:05,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-30 23:33:05,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:05,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:05,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:05,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:05,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:06,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:06,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:06,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:06,222 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:06,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:06,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:06,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:06,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-30 23:33:06,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:33:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:33:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:33:06,282 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-30 23:33:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:06,607 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-30 23:33:06,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:33:06,608 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-30 23:33:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:06,609 INFO L225 Difference]: With dead ends: 76 [2018-09-30 23:33:06,609 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:33:06,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:33:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:33:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-30 23:33:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:33:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 23:33:06,618 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-30 23:33:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:06,618 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 23:33:06,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:33:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 23:33:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:33:06,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:06,619 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-30 23:33:06,619 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:06,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-30 23:33:06,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:06,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:06,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:06,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:06,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:07,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:07,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:07,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:07,210 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:33:07,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:07,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:07,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:07,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 23:33:07,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:33:07,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:33:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:33:07,731 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-30 23:33:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:08,421 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 23:33:08,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:33:08,421 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-30 23:33:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:08,422 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:33:08,422 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:33:08,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:33:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:33:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:33:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:33:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 23:33:08,433 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-30 23:33:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:08,433 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 23:33:08,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:33:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 23:33:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:33:08,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:08,434 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-30 23:33:08,435 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:08,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:08,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-30 23:33:08,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:08,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:08,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:08,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:08,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:08,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:08,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:08,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:09,040 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 23:33:09,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:09,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:09,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:09,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-30 23:33:09,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:33:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:33:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:33:09,636 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-30 23:33:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:10,209 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-30 23:33:10,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:33:10,209 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-30 23:33:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:10,210 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:33:10,210 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:33:10,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1312, Invalid=3658, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:33:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:33:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:33:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:33:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 23:33:10,219 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-30 23:33:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:10,220 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 23:33:10,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:33:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 23:33:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:33:10,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:10,221 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-30 23:33:10,221 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:10,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-30 23:33:10,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:10,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:10,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:10,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:10,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:10,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:10,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:10,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:10,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:10,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:10,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-30 23:33:10,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:33:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:33:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:33:10,866 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-30 23:33:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:11,213 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 23:33:11,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:33:11,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-30 23:33:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:11,215 INFO L225 Difference]: With dead ends: 84 [2018-09-30 23:33:11,215 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:33:11,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:33:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:33:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-30 23:33:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:33:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 23:33:11,225 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-30 23:33:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:11,225 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 23:33:11,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:33:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 23:33:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:33:11,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:11,226 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-30 23:33:11,226 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:11,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-30 23:33:11,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:11,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:11,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:11,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:11,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:11,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:11,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:11,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:11,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:11,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:11,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:33:12,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:12,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-30 23:33:12,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:33:12,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:33:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:33:12,525 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-30 23:33:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:13,034 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-30 23:33:13,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:33:13,034 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-30 23:33:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:13,035 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:33:13,035 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:33:13,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:33:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:33:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:33:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:33:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 23:33:13,046 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-30 23:33:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:13,046 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 23:33:13,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:33:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 23:33:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:33:13,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:13,047 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-30 23:33:13,048 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:13,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:13,048 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-30 23:33:13,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:13,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:13,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:13,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:13,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:13,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:13,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:13,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:13,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 23:33:13,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:13,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:14,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:14,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-30 23:33:14,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:33:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:33:14,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:33:14,670 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-30 23:33:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:15,203 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-30 23:33:15,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:33:15,204 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-30 23:33:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:15,205 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:33:15,205 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:33:15,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:33:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:33:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:33:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:33:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 23:33:15,217 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-30 23:33:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:15,218 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 23:33:15,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:33:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 23:33:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:33:15,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:15,219 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-30 23:33:15,219 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:15,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-30 23:33:15,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:15,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:15,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:15,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:15,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:15,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:15,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:15,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:15,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:15,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:15,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:15,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-30 23:33:15,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:33:15,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:33:15,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:33:15,982 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-30 23:33:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:16,485 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 23:33:16,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:33:16,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-30 23:33:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:16,487 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:33:16,487 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 23:33:16,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:33:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 23:33:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-30 23:33:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:33:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 23:33:16,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-30 23:33:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:16,495 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 23:33:16,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:33:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 23:33:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:33:16,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:16,496 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-30 23:33:16,496 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:16,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-30 23:33:16,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:16,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:16,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:16,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:16,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:17,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:17,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:17,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:18,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:33:18,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:18,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:18,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:18,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-30 23:33:18,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:33:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:33:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:33:18,865 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-30 23:33:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:19,411 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-30 23:33:19,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:33:19,412 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-30 23:33:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:19,413 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:33:19,413 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:33:19,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:33:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:33:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:33:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:33:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 23:33:19,423 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-30 23:33:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:19,423 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 23:33:19,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:33:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 23:33:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:33:19,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:19,424 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-30 23:33:19,424 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:19,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-30 23:33:19,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:19,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:19,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:19,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:21,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:21,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:21,137 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:33:21,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:21,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:22,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:22,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-30 23:33:22,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:33:22,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:33:22,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:33:22,363 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-30 23:33:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:23,156 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-30 23:33:23,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:33:23,157 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-30 23:33:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:23,158 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:33:23,158 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:33:23,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1956, Invalid=5526, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:33:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:33:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:33:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:33:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 23:33:23,171 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-30 23:33:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:23,172 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 23:33:23,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:33:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 23:33:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:33:23,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:23,173 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-30 23:33:23,173 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:23,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-30 23:33:23,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:23,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:23,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:23,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:23,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:23,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:23,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:23,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:23,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:23,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:23,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-30 23:33:23,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:33:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:33:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:33:23,711 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-30 23:33:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:24,145 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-30 23:33:24,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:33:24,146 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-30 23:33:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:24,147 INFO L225 Difference]: With dead ends: 100 [2018-09-30 23:33:24,147 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 23:33:24,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:33:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 23:33:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-30 23:33:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:33:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 23:33:24,160 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-30 23:33:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:24,160 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 23:33:24,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:33:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 23:33:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:33:24,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:24,161 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-30 23:33:24,161 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:24,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-30 23:33:24,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:24,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:24,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:24,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:24,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:25,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:25,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:25,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:25,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:25,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:25,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:33:26,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:26,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-30 23:33:26,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:33:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:33:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=3703, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:33:26,319 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-30 23:33:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:26,953 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-30 23:33:26,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:33:26,953 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-30 23:33:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:26,954 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:33:26,954 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:33:26,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:33:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:33:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:33:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:33:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 23:33:26,966 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-30 23:33:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:26,966 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 23:33:26,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:33:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 23:33:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:33:26,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:26,966 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-30 23:33:26,967 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:26,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-30 23:33:26,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:26,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:26,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:26,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:27,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:27,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:27,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:28,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:33:28,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:28,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:28,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:28,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-30 23:33:28,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:33:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:33:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:33:28,955 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-30 23:33:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:29,765 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-30 23:33:29,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:33:29,765 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-30 23:33:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:29,766 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:33:29,766 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:33:29,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:33:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:33:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:33:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:33:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 23:33:29,776 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-30 23:33:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:29,776 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 23:33:29,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:33:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 23:33:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:33:29,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:29,777 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-30 23:33:29,778 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:29,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-30 23:33:29,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:29,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:29,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:30,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:30,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:30,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:30,407 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:30,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:30,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:30,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:30,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-30 23:33:30,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:33:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:33:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:33:30,476 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-30 23:33:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:31,112 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 23:33:31,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:33:31,113 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-30 23:33:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:31,114 INFO L225 Difference]: With dead ends: 108 [2018-09-30 23:33:31,114 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:33:31,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:33:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:33:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-30 23:33:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:33:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 23:33:31,127 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-30 23:33:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:31,128 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 23:33:31,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:33:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 23:33:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:33:31,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:31,128 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-30 23:33:31,129 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:31,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-30 23:33:31,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:31,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:31,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:31,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:31,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:33,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:33,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:33,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:33,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 23:33:33,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:33,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:34,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:34,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-30 23:33:34,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:33:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:33:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:33:34,291 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-30 23:33:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:34,993 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-30 23:33:34,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:33:34,994 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-30 23:33:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:34,995 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:33:34,995 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:33:34,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:33:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:33:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:33:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:33:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 23:33:35,008 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-30 23:33:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:35,008 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 23:33:35,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:33:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 23:33:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:33:35,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:35,009 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-30 23:33:35,009 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:35,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-30 23:33:35,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:35,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:35,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:35,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:35,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:36,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:36,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:36,558 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:36,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 23:33:36,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:36,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:37,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:37,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-30 23:33:37,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:33:37,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:33:37,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:33:37,722 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-30 23:33:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:39,031 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-30 23:33:39,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:33:39,031 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-30 23:33:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:39,032 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:33:39,032 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:33:39,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2728, Invalid=7778, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:33:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:33:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:33:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:33:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 23:33:39,046 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-30 23:33:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:39,046 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 23:33:39,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:33:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 23:33:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:33:39,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:39,047 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-30 23:33:39,047 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:39,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-30 23:33:39,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:39,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:39,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:39,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:39,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:39,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:39,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:39,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:39,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:39,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:39,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-30 23:33:39,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:33:39,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:33:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:33:39,959 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-30 23:33:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:40,577 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 23:33:40,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:33:40,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-30 23:33:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:40,580 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:33:40,580 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 23:33:40,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:33:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 23:33:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-30 23:33:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:33:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 23:33:40,595 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-30 23:33:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:40,596 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 23:33:40,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:33:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 23:33:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:33:40,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:40,597 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-30 23:33:40,597 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:40,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-30 23:33:40,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:40,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:40,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:40,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:40,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:42,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:42,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:42,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:42,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:42,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:42,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:33:43,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:43,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-30 23:33:43,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:33:43,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:33:43,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1539, Invalid=5103, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:33:43,734 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-30 23:33:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:44,959 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-30 23:33:44,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:33:44,960 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-30 23:33:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:44,960 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:33:44,960 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:33:44,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:33:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:33:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:33:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:33:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 23:33:44,973 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-30 23:33:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:44,974 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 23:33:44,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:33:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 23:33:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:33:44,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:44,974 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-30 23:33:44,974 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:44,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-30 23:33:44,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:44,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:44,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:44,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:44,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:46,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:46,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:46,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:46,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:33:46,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:46,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:48,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:48,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-30 23:33:48,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:33:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:33:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:33:48,077 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-30 23:33:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:48,934 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-30 23:33:48,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:33:48,934 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-30 23:33:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:48,935 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:33:48,935 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:33:48,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:33:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:33:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:33:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:33:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 23:33:48,950 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-30 23:33:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 23:33:48,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:33:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 23:33:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:33:48,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:48,951 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-30 23:33:48,951 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:48,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-30 23:33:48,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:48,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:48,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:48,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:48,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:49,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:49,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:49,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:49,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:49,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:49,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:50,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:50,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-30 23:33:50,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:33:50,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:33:50,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:33:50,074 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-30 23:33:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:51,314 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-30 23:33:51,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:33:51,315 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-30 23:33:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:51,316 INFO L225 Difference]: With dead ends: 124 [2018-09-30 23:33:51,317 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 23:33:51,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:33:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 23:33:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-30 23:33:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:33:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-30 23:33:51,332 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-30 23:33:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:51,333 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-30 23:33:51,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:33:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-30 23:33:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:33:51,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:51,334 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-30 23:33:51,334 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:51,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-30 23:33:51,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:51,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:51,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:51,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:51,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:52,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:52,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:52,530 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:52,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:33:52,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:52,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:54,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:54,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-30 23:33:54,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:33:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:33:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:33:54,067 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-30 23:33:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:55,109 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-30 23:33:55,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:33:55,109 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-30 23:33:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:55,110 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:33:55,111 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:33:55,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:33:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:33:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:33:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:33:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-30 23:33:55,127 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-30 23:33:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:55,128 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-30 23:33:55,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:33:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-30 23:33:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:33:55,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:55,129 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-30 23:33:55,129 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:55,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:55,129 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-30 23:33:55,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:55,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:55,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:55,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:55,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:56,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:56,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:56,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:56,680 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 23:33:56,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:56,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:58,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:58,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-30 23:33:58,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:33:58,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:33:58,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:33:58,118 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-30 23:33:59,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:59,038 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-30 23:33:59,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:33:59,038 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-30 23:33:59,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:59,039 INFO L225 Difference]: With dead ends: 187 [2018-09-30 23:33:59,039 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:33:59,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3628, Invalid=10414, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:33:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:33:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:33:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:33:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-30 23:33:59,057 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-30 23:33:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:59,057 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-30 23:33:59,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:33:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-30 23:33:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:33:59,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:59,058 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-30 23:33:59,058 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:59,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-30 23:33:59,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:59,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:59,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:59,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:59,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:59,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:59,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:59,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:59,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:00,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:00,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-30 23:34:00,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:34:00,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:34:00,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:34:00,051 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-30 23:34:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:00,710 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-30 23:34:00,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:34:00,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-30 23:34:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:00,711 INFO L225 Difference]: With dead ends: 132 [2018-09-30 23:34:00,712 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 23:34:00,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:34:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 23:34:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-30 23:34:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:34:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-30 23:34:00,727 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-30 23:34:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:00,727 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-30 23:34:00,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:34:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-30 23:34:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:34:00,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:00,728 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-30 23:34:00,728 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:00,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-30 23:34:00,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:00,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:00,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:00,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:00,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:02,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:02,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:02,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:02,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:02,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:02,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:34:04,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:04,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-30 23:34:04,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:34:04,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:34:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2015, Invalid=6727, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:34:04,485 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-30 23:34:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:05,624 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-30 23:34:05,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:34:05,624 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-30 23:34:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:05,625 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:34:05,625 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:34:05,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:34:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:34:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:34:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:34:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-30 23:34:05,640 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-30 23:34:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:05,641 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-30 23:34:05,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:34:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-30 23:34:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:34:05,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:05,641 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-30 23:34:05,642 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:05,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-30 23:34:05,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:05,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:05,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:05,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:05,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:07,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:07,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:07,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:07,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-30 23:34:07,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:07,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:09,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:09,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-30 23:34:09,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:34:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:34:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:34:09,269 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-30 23:34:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:10,399 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-30 23:34:10,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:34:10,400 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-30 23:34:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:10,400 INFO L225 Difference]: With dead ends: 199 [2018-09-30 23:34:10,400 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:34:10,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:34:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:34:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:34:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:34:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-30 23:34:10,416 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-30 23:34:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:10,416 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-30 23:34:10,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:34:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-30 23:34:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:34:10,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:10,417 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-30 23:34:10,417 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:10,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-30 23:34:10,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:10,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:10,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:10,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:10,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:11,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:11,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:11,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:11,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:11,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:11,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:11,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:11,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-30 23:34:11,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:34:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:34:11,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:34:11,763 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-30 23:34:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:12,490 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 23:34:12,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:34:12,490 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-30 23:34:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:12,492 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:34:12,492 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 23:34:12,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:34:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 23:34:12,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-30 23:34:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:34:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-30 23:34:12,508 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-30 23:34:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:12,508 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-30 23:34:12,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:34:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-30 23:34:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:34:12,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:12,509 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-30 23:34:12,509 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:12,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-30 23:34:12,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:12,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:12,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:12,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:12,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:14,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:14,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:14,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:14,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:34:14,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:14,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:17,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:17,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-30 23:34:17,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:34:17,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:34:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:34:17,902 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-30 23:34:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:19,077 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-30 23:34:19,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:34:19,077 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-30 23:34:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:19,078 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:34:19,078 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:34:19,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:34:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:34:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:34:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:34:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-30 23:34:19,094 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-30 23:34:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:19,094 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-30 23:34:19,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:34:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-30 23:34:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:34:19,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:19,095 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-30 23:34:19,095 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:19,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-30 23:34:19,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:19,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:19,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:19,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:19,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:20,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:20,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:20,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:20,820 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:34:20,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:20,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:22,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:22,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-30 23:34:22,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:34:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:34:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:34:22,928 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-30 23:34:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:24,184 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-30 23:34:24,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:34:24,184 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-30 23:34:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:24,185 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:34:24,185 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:34:24,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4656, Invalid=13434, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:34:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:34:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:34:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:34:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-30 23:34:24,207 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-30 23:34:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:24,207 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-30 23:34:24,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:34:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-30 23:34:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:34:24,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:24,208 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-30 23:34:24,208 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:24,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-30 23:34:24,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:24,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:24,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:24,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:24,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:25,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:25,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:25,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:25,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:25,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:25,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-30 23:34:25,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:34:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:34:25,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:34:25,564 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-30 23:34:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:26,322 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-30 23:34:26,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:34:26,322 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-30 23:34:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:26,324 INFO L225 Difference]: With dead ends: 148 [2018-09-30 23:34:26,324 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 23:34:26,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:34:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 23:34:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-30 23:34:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:34:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-30 23:34:26,341 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-30 23:34:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:26,342 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-30 23:34:26,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:34:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-30 23:34:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:34:26,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:26,343 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-30 23:34:26,344 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:26,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-30 23:34:26,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:26,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:26,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:26,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:26,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:28,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:28,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:28,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:28,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:28,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:28,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:34:30,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:30,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-30 23:34:30,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:34:30,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:34:30,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=8575, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:34:30,429 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-30 23:34:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:31,702 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-30 23:34:31,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:34:31,702 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-30 23:34:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:31,703 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:34:31,703 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:34:31,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:34:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:34:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:34:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:34:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-30 23:34:31,720 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-30 23:34:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:31,720 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-30 23:34:31,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:34:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-30 23:34:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:34:31,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:31,721 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-30 23:34:31,721 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:31,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:31,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-30 23:34:31,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:31,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:31,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:31,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:31,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:33,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:33,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:33,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:33,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:34:33,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:33,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:35,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:35,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-30 23:34:35,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:34:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:34:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:34:35,763 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-30 23:34:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:37,355 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-30 23:34:37,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:34:37,355 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-30 23:34:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:37,356 INFO L225 Difference]: With dead ends: 223 [2018-09-30 23:34:37,356 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:34:37,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:34:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:34:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:34:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:34:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-30 23:34:37,373 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-30 23:34:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:37,373 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-30 23:34:37,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:34:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-30 23:34:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:34:37,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:37,374 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-30 23:34:37,374 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:37,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-30 23:34:37,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:37,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:37,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:37,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:37,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:38,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:38,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:38,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:38,297 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:38,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:38,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:38,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:38,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-30 23:34:38,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:34:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:34:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:34:38,421 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-30 23:34:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:39,273 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-30 23:34:39,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:34:39,273 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-30 23:34:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:39,274 INFO L225 Difference]: With dead ends: 156 [2018-09-30 23:34:39,274 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 23:34:39,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:34:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 23:34:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-30 23:34:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:34:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-30 23:34:39,295 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-30 23:34:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:39,295 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-30 23:34:39,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:34:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-30 23:34:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:34:39,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:39,296 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-30 23:34:39,296 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:39,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-30 23:34:39,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:39,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:39,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:39,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:39,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:41,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:41,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:41,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:41,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-30 23:34:41,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:41,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:43,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:43,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-30 23:34:43,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:34:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:34:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:34:43,968 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-30 23:34:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:45,377 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-30 23:34:45,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:34:45,377 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-30 23:34:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:45,378 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:34:45,378 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:34:45,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:34:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:34:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:34:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:34:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-30 23:34:45,397 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-30 23:34:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:45,397 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-30 23:34:45,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:34:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-30 23:34:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:34:45,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:45,398 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-30 23:34:45,398 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:45,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-30 23:34:45,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:45,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:45,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:45,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:45,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:47,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:47,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:47,173 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:47,347 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 23:34:47,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:47,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:49,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:49,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-30 23:34:49,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:34:49,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:34:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:34:49,736 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-09-30 23:34:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:51,068 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-09-30 23:34:51,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:34:51,069 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-09-30 23:34:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:51,069 INFO L225 Difference]: With dead ends: 235 [2018-09-30 23:34:51,069 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:34:51,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5812, Invalid=16838, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:34:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:34:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:34:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:34:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-30 23:34:51,089 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-30 23:34:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:51,089 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-30 23:34:51,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:34:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-30 23:34:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:34:51,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:51,090 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-30 23:34:51,090 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:51,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-09-30 23:34:51,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:51,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:51,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:51,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:51,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:51,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:51,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:51,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:51,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:52,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:52,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-30 23:34:52,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:34:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:34:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:34:52,116 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-30 23:34:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:53,202 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 23:34:53,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:34:53,203 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-30 23:34:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:53,204 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:34:53,204 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 23:34:53,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:34:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 23:34:53,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-09-30 23:34:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:34:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-30 23:34:53,225 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-09-30 23:34:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:53,225 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-30 23:34:53,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:34:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-30 23:34:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:34:53,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:53,226 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-30 23:34:53,226 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:53,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:53,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-09-30 23:34:53,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:53,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:53,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:53,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:53,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:55,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:55,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:55,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:55,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:55,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:55,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:34:58,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:58,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-09-30 23:34:58,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:34:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:34:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3159, Invalid=10647, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:34:58,072 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-09-30 23:34:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:59,653 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-09-30 23:34:59,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:34:59,653 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-09-30 23:34:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:59,654 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:34:59,655 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:34:59,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:34:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:34:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:34:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:34:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-30 23:34:59,675 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-30 23:34:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:59,675 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-30 23:34:59,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:34:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-30 23:34:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:34:59,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:59,676 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-30 23:34:59,676 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:59,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-09-30 23:34:59,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:59,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:59,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:59,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:59,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:01,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:01,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:01,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:01,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:35:01,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:01,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:04,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:04,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-09-30 23:35:04,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:35:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:35:04,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:35:04,544 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-09-30 23:35:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:06,173 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-09-30 23:35:06,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:35:06,174 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-09-30 23:35:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:06,174 INFO L225 Difference]: With dead ends: 247 [2018-09-30 23:35:06,174 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:35:06,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:35:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:35:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:35:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:35:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-30 23:35:06,195 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-30 23:35:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:06,195 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-30 23:35:06,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:35:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-30 23:35:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:35:06,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:06,196 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-30 23:35:06,196 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:06,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:06,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-09-30 23:35:06,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:06,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:06,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:06,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:06,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:07,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:07,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:07,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:07,280 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:07,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:07,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:07,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:07,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-30 23:35:07,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:35:07,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:35:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:35:07,389 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-30 23:35:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:08,520 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-09-30 23:35:08,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:35:08,520 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-30 23:35:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:08,521 INFO L225 Difference]: With dead ends: 172 [2018-09-30 23:35:08,521 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 23:35:08,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:35:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 23:35:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-09-30 23:35:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:35:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-30 23:35:08,551 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-09-30 23:35:08,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:08,552 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-30 23:35:08,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:35:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-30 23:35:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:35:08,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:08,553 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-30 23:35:08,553 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:08,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-09-30 23:35:08,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:08,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:08,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:08,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:08,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:10,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:10,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:10,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:35:10,967 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:35:10,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:10,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:13,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:13,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-30 23:35:13,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:35:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:35:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:35:13,843 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-09-30 23:35:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:15,574 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-09-30 23:35:15,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:35:15,575 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-09-30 23:35:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:15,576 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:35:15,576 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:35:15,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6888, Invalid=20172, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:35:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:35:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:35:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:35:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-30 23:35:15,607 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-30 23:35:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:15,607 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-30 23:35:15,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:35:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-30 23:35:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:35:15,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:15,608 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-30 23:35:15,609 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:15,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-09-30 23:35:15,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:15,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:15,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:15,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:15,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:18,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:18,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:18,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:19,067 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-09-30 23:35:19,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:19,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:21,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:21,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-09-30 23:35:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:35:21,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:35:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:35:21,744 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-09-30 23:35:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:23,763 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-09-30 23:35:23,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:35:23,763 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-09-30 23:35:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:23,765 INFO L225 Difference]: With dead ends: 259 [2018-09-30 23:35:23,765 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:35:23,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7096, Invalid=20626, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:35:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:35:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:35:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:35:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-30 23:35:23,788 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-30 23:35:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:23,789 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-30 23:35:23,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:35:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-30 23:35:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:35:23,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:23,790 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-30 23:35:23,790 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:23,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-09-30 23:35:23,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:23,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:23,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:23,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:23,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:24,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:24,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:24,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:24,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:24,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:24,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-30 23:35:24,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:35:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:35:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:35:24,952 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-30 23:35:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:25,982 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-30 23:35:25,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:35:25,983 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-30 23:35:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:25,984 INFO L225 Difference]: With dead ends: 180 [2018-09-30 23:35:25,984 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 23:35:25,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:35:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 23:35:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-09-30 23:35:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:35:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-30 23:35:26,014 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-09-30 23:35:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:26,014 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-30 23:35:26,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:35:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-30 23:35:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:35:26,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:26,015 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-30 23:35:26,015 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:26,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-09-30 23:35:26,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:26,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:26,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:26,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:26,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:28,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:28,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:28,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:28,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:28,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:28,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:35:31,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:31,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-09-30 23:35:31,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:35:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:35:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3827, Invalid=12943, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:35:31,374 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-09-30 23:35:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:33,279 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-09-30 23:35:33,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:35:33,280 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-09-30 23:35:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:33,280 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:35:33,281 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:35:33,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6153 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:35:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:35:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:35:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:35:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-30 23:35:33,305 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-30 23:35:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:33,305 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-30 23:35:33,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:35:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-30 23:35:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:35:33,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:33,307 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-30 23:35:33,307 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:33,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-09-30 23:35:33,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:33,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:33,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:33,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:33,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:35,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:35,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:35,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:36,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-30 23:35:36,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:36,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:39,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:39,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-09-30 23:35:39,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:35:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:35:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:35:39,333 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-09-30 23:35:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:41,017 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-09-30 23:35:41,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:35:41,017 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-09-30 23:35:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:41,018 INFO L225 Difference]: With dead ends: 271 [2018-09-30 23:35:41,018 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:35:41,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6323 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7786, Invalid=22664, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 23:35:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:35:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:35:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:35:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-30 23:35:41,042 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-30 23:35:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:41,042 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-30 23:35:41,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:35:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-30 23:35:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:35:41,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:41,043 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-30 23:35:41,044 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:41,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-09-30 23:35:41,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:41,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:41,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:41,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:41,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:41,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:41,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:42,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:42,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:42,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:42,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:42,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:42,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-30 23:35:42,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:35:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:35:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:35:42,244 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-30 23:35:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:43,363 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-30 23:35:43,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:35:43,364 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-30 23:35:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:43,365 INFO L225 Difference]: With dead ends: 188 [2018-09-30 23:35:43,365 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 23:35:43,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:35:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 23:35:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-09-30 23:35:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:35:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-30 23:35:43,394 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-09-30 23:35:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:43,394 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-30 23:35:43,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:35:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-30 23:35:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:35:43,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:43,395 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-30 23:35:43,395 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:43,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-09-30 23:35:43,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:43,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:43,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:43,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:43,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:46,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:46,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:46,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:35:46,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:35:46,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:46,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:49,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:49,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-09-30 23:35:49,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:35:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:35:49,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4276, Invalid=14356, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:35:49,720 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-09-30 23:35:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:51,501 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-09-30 23:35:51,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:35:51,501 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-09-30 23:35:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:51,502 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:35:51,502 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:35:51,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-09-30 23:35:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:35:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:35:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:35:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-30 23:35:51,533 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-30 23:35:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:51,533 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-30 23:35:51,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:35:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-30 23:35:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:35:51,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:51,534 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-30 23:35:51,534 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:51,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-09-30 23:35:51,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:51,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:51,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:51,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:51,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:54,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:54,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:54,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:54,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 23:35:54,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:54,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:57,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:57,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-09-30 23:35:57,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:35:57,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:35:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4323, Invalid=14583, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:35:57,687 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-09-30 23:36:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:00,108 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-09-30 23:36:00,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:36:00,108 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-09-30 23:36:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:00,109 INFO L225 Difference]: With dead ends: 283 [2018-09-30 23:36:00,109 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:36:00,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8508, Invalid=24798, Unknown=0, NotChecked=0, Total=33306 [2018-09-30 23:36:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:36:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:36:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:36:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-30 23:36:00,135 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-30 23:36:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:00,136 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-30 23:36:00,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:36:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-30 23:36:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:36:00,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:00,137 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-30 23:36:00,137 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:00,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-09-30 23:36:00,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:00,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:00,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:00,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:00,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:01,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:01,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:01,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:01,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:01,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:01,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-30 23:36:01,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:36:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:36:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:36:01,785 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-30 23:36:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:02,977 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-09-30 23:36:02,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:36:02,978 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-30 23:36:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:02,979 INFO L225 Difference]: With dead ends: 196 [2018-09-30 23:36:02,979 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 23:36:02,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:36:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 23:36:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-09-30 23:36:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:36:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-30 23:36:03,007 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-09-30 23:36:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:03,007 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-30 23:36:03,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:36:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-30 23:36:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:36:03,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:03,008 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-30 23:36:03,008 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:03,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:03,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-09-30 23:36:03,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:03,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:03,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:03,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:03,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:06,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:06,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:06,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:06,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:06,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:06,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:36:09,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:09,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-09-30 23:36:09,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:36:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:36:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4559, Invalid=15463, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:36:09,752 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-09-30 23:36:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:11,979 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-09-30 23:36:11,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:36:11,980 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-09-30 23:36:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:11,980 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:36:11,980 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:36:11,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7383 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8929, Invalid=26227, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 23:36:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:36:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:36:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:36:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-30 23:36:12,008 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-30 23:36:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:12,008 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-30 23:36:12,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:36:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-30 23:36:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:36:12,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:12,009 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-30 23:36:12,009 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:12,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-09-30 23:36:12,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:12,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:12,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:12,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:12,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:15,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:15,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:15,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:36:15,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:36:15,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:15,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:18,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:18,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-09-30 23:36:18,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:36:18,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:36:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4703, Invalid=15889, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:36:18,872 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-09-30 23:36:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:21,352 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-09-30 23:36:21,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:36:21,352 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-09-30 23:36:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:21,353 INFO L225 Difference]: With dead ends: 295 [2018-09-30 23:36:21,353 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:36:21,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9262, Invalid=27028, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 23:36:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:36:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:36:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:36:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-30 23:36:21,382 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-30 23:36:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:21,382 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-30 23:36:21,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:36:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-30 23:36:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:36:21,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:21,383 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-30 23:36:21,383 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:21,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-09-30 23:36:21,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:21,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:21,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:21,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:21,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:22,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:22,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:22,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:36:22,714 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:36:22,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:22,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:22,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:22,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-30 23:36:22,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:36:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:36:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:36:22,825 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-30 23:36:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:24,092 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-09-30 23:36:24,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:36:24,092 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-30 23:36:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:24,093 INFO L225 Difference]: With dead ends: 204 [2018-09-30 23:36:24,093 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 23:36:24,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:36:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 23:36:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-09-30 23:36:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:36:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-30 23:36:24,127 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-09-30 23:36:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:24,127 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-30 23:36:24,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:36:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-30 23:36:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:36:24,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:24,128 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-30 23:36:24,128 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:24,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-09-30 23:36:24,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:24,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:24,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:24,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:27,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:27,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:27,310 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:36:27,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-30 23:36:27,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:27,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:31,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:31,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-09-30 23:36:31,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 23:36:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 23:36:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5048, Invalid=17004, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:36:31,465 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-09-30 23:36:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:33,890 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-09-30 23:36:33,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:36:33,890 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-09-30 23:36:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:33,891 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:36:33,891 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:36:33,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8136 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9800, Invalid=28812, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 23:36:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:36:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:36:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:36:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-30 23:36:33,924 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-30 23:36:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:33,925 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-30 23:36:33,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 23:36:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-30 23:36:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:36:33,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:33,926 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-30 23:36:33,926 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:33,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-09-30 23:36:33,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:33,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:33,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:33,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:33,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:37,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:37,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:37,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:36:37,579 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 23:36:37,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:37,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:41,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:41,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 149 [2018-09-30 23:36:41,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:36:41,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:36:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5099, Invalid=17251, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:36:41,566 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 150 states. [2018-09-30 23:36:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:43,808 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2018-09-30 23:36:43,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:36:43,808 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 202 [2018-09-30 23:36:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:43,809 INFO L225 Difference]: With dead ends: 307 [2018-09-30 23:36:43,809 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:36:43,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8234 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=10048, Invalid=29354, Unknown=0, NotChecked=0, Total=39402 [2018-09-30 23:36:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:36:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:36:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:36:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-09-30 23:36:43,839 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-09-30 23:36:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:43,839 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-09-30 23:36:43,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:36:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-09-30 23:36:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:36:43,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:43,840 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-09-30 23:36:43,840 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:43,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash 818141147, now seen corresponding path program 73 times [2018-09-30 23:36:43,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:43,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:43,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:43,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:43,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:45,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:45,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:45,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:45,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:45,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:45,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-09-30 23:36:45,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:36:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:36:45,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:36:45,446 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-09-30 23:36:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:46,902 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-30 23:36:46,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:36:46,902 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-09-30 23:36:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:46,903 INFO L225 Difference]: With dead ends: 212 [2018-09-30 23:36:46,903 INFO L226 Difference]: Without dead ends: 210 [2018-09-30 23:36:46,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:36:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-09-30 23:36:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-09-30 23:36:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:36:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-09-30 23:36:46,935 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2018-09-30 23:36:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:46,935 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-09-30 23:36:46,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:36:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-09-30 23:36:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:36:46,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:46,936 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-09-30 23:36:46,936 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:46,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash -66136881, now seen corresponding path program 74 times [2018-09-30 23:36:46,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:46,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:46,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:46,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:46,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:50,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:50,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:50,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:50,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:50,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:50,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2650 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:36:54,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:54,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 153 [2018-09-30 23:36:54,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:36:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:36:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5355, Invalid=18207, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:36:54,437 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 154 states. [2018-09-30 23:36:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:56,780 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-09-30 23:36:56,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:36:56,780 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 208 [2018-09-30 23:36:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:56,781 INFO L225 Difference]: With dead ends: 317 [2018-09-30 23:36:56,781 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:36:56,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8725 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=10505, Invalid=30907, Unknown=0, NotChecked=0, Total=41412 [2018-09-30 23:36:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:36:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:36:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:36:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-09-30 23:36:56,814 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-09-30 23:36:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:56,814 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-09-30 23:36:56,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:36:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-09-30 23:36:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:36:56,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:56,815 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-09-30 23:36:56,815 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:56,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1015850955, now seen corresponding path program 75 times [2018-09-30 23:36:56,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:56,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:56,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:56,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:56,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:00,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:00,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:00,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:00,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:37:00,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:00,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:04,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:04,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 155 [2018-09-30 23:37:04,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:37:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:37:04,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5511, Invalid=18669, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:37:04,516 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 156 states. [2018-09-30 23:37:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:07,118 INFO L93 Difference]: Finished difference Result 319 states and 321 transitions. [2018-09-30 23:37:07,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:37:07,118 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 210 [2018-09-30 23:37:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:07,119 INFO L225 Difference]: With dead ends: 319 [2018-09-30 23:37:07,119 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 23:37:07,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8927 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=10866, Invalid=31776, Unknown=0, NotChecked=0, Total=42642 [2018-09-30 23:37:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 23:37:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 23:37:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:37:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-09-30 23:37:07,152 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-09-30 23:37:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:07,152 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-09-30 23:37:07,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:37:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-09-30 23:37:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:37:07,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:07,153 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-09-30 23:37:07,153 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:07,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1424075719, now seen corresponding path program 76 times [2018-09-30 23:37:07,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:07,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:07,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:07,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:07,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:08,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:08,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:08,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:37:08,667 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:37:08,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:08,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:08,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:08,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2018-09-30 23:37:08,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:37:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:37:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:37:08,771 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 58 states. [2018-09-30 23:37:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:10,246 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2018-09-30 23:37:10,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:37:10,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 212 [2018-09-30 23:37:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:10,248 INFO L225 Difference]: With dead ends: 220 [2018-09-30 23:37:10,248 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 23:37:10,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:37:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 23:37:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2018-09-30 23:37:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:37:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-09-30 23:37:10,293 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 212 [2018-09-30 23:37:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:10,294 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-09-30 23:37:10,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:37:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-09-30 23:37:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:37:10,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:10,295 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-09-30 23:37:10,295 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:10,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1946735291, now seen corresponding path program 77 times [2018-09-30 23:37:10,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:10,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:10,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:10,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:10,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:13,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:13,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:13,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:37:14,287 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:37:14,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:14,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:18,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:18,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 160 [2018-09-30 23:37:18,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 23:37:18,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 23:37:18,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5884, Invalid=19876, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:37:18,841 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 161 states. [2018-09-30 23:37:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:21,505 INFO L93 Difference]: Finished difference Result 329 states and 331 transitions. [2018-09-30 23:37:21,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:37:21,505 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 216 [2018-09-30 23:37:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:21,506 INFO L225 Difference]: With dead ends: 329 [2018-09-30 23:37:21,506 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:37:21,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9542 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=11448, Invalid=33708, Unknown=0, NotChecked=0, Total=45156 [2018-09-30 23:37:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:37:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 23:37:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:37:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-09-30 23:37:21,541 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-09-30 23:37:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:21,541 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-09-30 23:37:21,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 23:37:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-09-30 23:37:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:37:21,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:21,542 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-09-30 23:37:21,543 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:21,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash -34477641, now seen corresponding path program 78 times [2018-09-30 23:37:21,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:21,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:21,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:21,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:21,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:25,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:25,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:25,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:37:25,462 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2018-09-30 23:37:25,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:25,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:30,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:30,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 161 [2018-09-30 23:37:30,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:37:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:37:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5939, Invalid=20143, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:37:30,083 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 162 states. [2018-09-30 23:37:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:32,807 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-09-30 23:37:32,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:37:32,807 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 218 [2018-09-30 23:37:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:32,808 INFO L225 Difference]: With dead ends: 331 [2018-09-30 23:37:32,808 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:37:32,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9648 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=11716, Invalid=34294, Unknown=0, NotChecked=0, Total=46010 [2018-09-30 23:37:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:37:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:37:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:37:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-09-30 23:37:32,843 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-09-30 23:37:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:32,843 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-09-30 23:37:32,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:37:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-09-30 23:37:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 23:37:32,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:32,844 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-09-30 23:37:32,844 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:32,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1309593165, now seen corresponding path program 79 times [2018-09-30 23:37:32,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:32,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:32,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:32,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:32,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:34,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:34,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:34,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:34,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:34,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:34,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2018-09-30 23:37:34,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:37:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:37:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:37:34,513 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 60 states. [2018-09-30 23:37:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:36,053 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2018-09-30 23:37:36,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:37:36,053 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 220 [2018-09-30 23:37:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:36,055 INFO L225 Difference]: With dead ends: 228 [2018-09-30 23:37:36,055 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 23:37:36,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:37:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 23:37:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2018-09-30 23:37:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:37:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-09-30 23:37:36,092 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 220 [2018-09-30 23:37:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:36,092 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-09-30 23:37:36,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:37:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-09-30 23:37:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:37:36,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:36,093 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 54, 1, 1, 1, 1] [2018-09-30 23:37:36,093 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:36,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash 281772711, now seen corresponding path program 80 times [2018-09-30 23:37:36,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:36,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:36,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:36,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:36,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:40,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:40,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:40,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:37:40,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:37:40,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:40,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3078 proven. 2970 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:37:45,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:45,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110] total 165 [2018-09-30 23:37:45,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:37:45,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:37:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6215, Invalid=21175, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:37:45,118 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 166 states. [2018-09-30 23:37:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:47,720 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-09-30 23:37:47,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:37:47,720 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 224 [2018-09-30 23:37:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:47,721 INFO L225 Difference]: With dead ends: 341 [2018-09-30 23:37:47,721 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:37:47,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10179 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=12209, Invalid=35971, Unknown=0, NotChecked=0, Total=48180 [2018-09-30 23:37:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:37:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 23:37:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:37:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-09-30 23:37:47,768 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2018-09-30 23:37:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:47,768 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-09-30 23:37:47,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:37:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-09-30 23:37:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:37:47,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:47,769 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-09-30 23:37:47,769 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:47,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1989926307, now seen corresponding path program 81 times [2018-09-30 23:37:47,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:47,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:47,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:47,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:47,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:51,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:37:51,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:37:51,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:51,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2018-09-30 23:37:51,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:51,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:56,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:37:56,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 167 [2018-09-30 23:37:56,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:37:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:37:56,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6383, Invalid=21673, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:37:56,577 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 168 states. [2018-09-30 23:37:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:59,495 INFO L93 Difference]: Finished difference Result 343 states and 345 transitions. [2018-09-30 23:37:59,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:37:59,495 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 226 [2018-09-30 23:37:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:59,496 INFO L225 Difference]: With dead ends: 343 [2018-09-30 23:37:59,496 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:37:59,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10397 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=12598, Invalid=36908, Unknown=0, NotChecked=0, Total=49506 [2018-09-30 23:37:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:37:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:37:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:37:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-09-30 23:37:59,533 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2018-09-30 23:37:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:59,533 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-09-30 23:37:59,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:37:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-09-30 23:37:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:37:59,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:59,534 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 1, 1, 1, 1] [2018-09-30 23:37:59,535 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:59,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1446942305, now seen corresponding path program 82 times [2018-09-30 23:37:59,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:59,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:59,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:59,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:59,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:01,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:01,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:01,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:38:01,247 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:38:01,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:01,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:01,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:01,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2018-09-30 23:38:01,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:38:01,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:38:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:38:01,376 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 62 states. [2018-09-30 23:38:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:03,107 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-30 23:38:03,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:38:03,108 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 228 [2018-09-30 23:38:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:03,109 INFO L225 Difference]: With dead ends: 236 [2018-09-30 23:38:03,109 INFO L226 Difference]: Without dead ends: 234 [2018-09-30 23:38:03,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:38:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-30 23:38:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-09-30 23:38:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 23:38:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-09-30 23:38:03,147 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 228 [2018-09-30 23:38:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:03,148 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-09-30 23:38:03,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:38:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-09-30 23:38:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:38:03,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:03,149 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 56, 1, 1, 1, 1] [2018-09-30 23:38:03,149 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:03,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1264196461, now seen corresponding path program 83 times [2018-09-30 23:38:03,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:03,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:03,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:03,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:03,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:07,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:07,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:07,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:38:07,949 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:38:07,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:07,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:13,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:13,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 172 [2018-09-30 23:38:13,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-09-30 23:38:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-09-30 23:38:13,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6784, Invalid=22972, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:38:13,181 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 173 states. [2018-09-30 23:38:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:15,999 INFO L93 Difference]: Finished difference Result 353 states and 355 transitions. [2018-09-30 23:38:15,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:38:15,999 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 232 [2018-09-30 23:38:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:16,000 INFO L225 Difference]: With dead ends: 353 [2018-09-30 23:38:16,000 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:38:16,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11060 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=13224, Invalid=38988, Unknown=0, NotChecked=0, Total=52212 [2018-09-30 23:38:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:38:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 23:38:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:38:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-09-30 23:38:16,042 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2018-09-30 23:38:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:16,043 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-09-30 23:38:16,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-09-30 23:38:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-09-30 23:38:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:38:16,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:16,044 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-09-30 23:38:16,044 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:16,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1289323407, now seen corresponding path program 84 times [2018-09-30 23:38:16,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:16,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:16,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:16,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:16,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:20,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:20,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:20,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:38:20,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 23:38:20,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:20,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:26,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:26,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 173 [2018-09-30 23:38:26,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-09-30 23:38:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-09-30 23:38:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6843, Invalid=23259, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:38:26,144 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 174 states. [2018-09-30 23:38:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:29,396 INFO L93 Difference]: Finished difference Result 355 states and 357 transitions. [2018-09-30 23:38:29,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:38:29,396 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 234 [2018-09-30 23:38:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:29,397 INFO L225 Difference]: With dead ends: 355 [2018-09-30 23:38:29,397 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 23:38:29,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=13512, Invalid=39618, Unknown=0, NotChecked=0, Total=53130 [2018-09-30 23:38:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 23:38:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 23:38:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 23:38:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-09-30 23:38:29,450 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2018-09-30 23:38:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:29,450 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-09-30 23:38:29,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-09-30 23:38:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-09-30 23:38:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:38:29,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:29,452 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 1, 1, 1, 1] [2018-09-30 23:38:29,452 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:29,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1499376757, now seen corresponding path program 85 times [2018-09-30 23:38:29,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:29,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:29,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:29,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:29,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:31,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:31,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:31,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:31,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:31,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:31,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2018-09-30 23:38:31,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:38:31,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:38:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:38:31,426 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 64 states. [2018-09-30 23:38:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:33,373 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2018-09-30 23:38:33,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:38:33,374 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 236 [2018-09-30 23:38:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:33,375 INFO L225 Difference]: With dead ends: 244 [2018-09-30 23:38:33,375 INFO L226 Difference]: Without dead ends: 242 [2018-09-30 23:38:33,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5614, Invalid=9392, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:38:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-09-30 23:38:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2018-09-30 23:38:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:38:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-09-30 23:38:33,417 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2018-09-30 23:38:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:33,417 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-09-30 23:38:33,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:38:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-09-30 23:38:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:38:33,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:33,418 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 58, 1, 1, 1, 1] [2018-09-30 23:38:33,418 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:33,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash 174520447, now seen corresponding path program 86 times [2018-09-30 23:38:33,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:33,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:33,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:33,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:38:33,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3540 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:37,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:37,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:37,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:38:38,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:38:38,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:38,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3538 proven. 3422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:38:43,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:43,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118] total 177 [2018-09-30 23:38:43,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-09-30 23:38:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-09-30 23:38:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7139, Invalid=24367, Unknown=0, NotChecked=0, Total=31506 [2018-09-30 23:38:43,732 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 178 states. [2018-09-30 23:38:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:46,768 INFO L93 Difference]: Finished difference Result 365 states and 367 transitions. [2018-09-30 23:38:46,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:38:46,768 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 240 [2018-09-30 23:38:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:46,769 INFO L225 Difference]: With dead ends: 365 [2018-09-30 23:38:46,769 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:38:46,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11745 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=14041, Invalid=41419, Unknown=0, NotChecked=0, Total=55460 [2018-09-30 23:38:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:38:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 23:38:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:38:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-09-30 23:38:46,811 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2018-09-30 23:38:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:46,811 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-09-30 23:38:46,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-09-30 23:38:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-09-30 23:38:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:38:46,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:46,813 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-09-30 23:38:46,813 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:46,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash -277226629, now seen corresponding path program 87 times [2018-09-30 23:38:46,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:46,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:46,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:46,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:46,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:51,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:51,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:51,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:38:52,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:38:52,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:52,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:57,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:57,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 179 [2018-09-30 23:38:57,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-09-30 23:38:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-09-30 23:38:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7319, Invalid=24901, Unknown=0, NotChecked=0, Total=32220 [2018-09-30 23:38:57,848 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 180 states. [2018-09-30 23:39:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:01,182 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2018-09-30 23:39:01,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:39:01,182 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 242 [2018-09-30 23:39:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:01,183 INFO L225 Difference]: With dead ends: 367 [2018-09-30 23:39:01,183 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:39:01,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11979 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=14458, Invalid=42424, Unknown=0, NotChecked=0, Total=56882 [2018-09-30 23:39:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:39:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:39:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:39:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2018-09-30 23:39:01,224 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2018-09-30 23:39:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:01,225 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2018-09-30 23:39:01,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-09-30 23:39:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2018-09-30 23:39:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 23:39:01,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:01,226 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 1, 1, 1, 1] [2018-09-30 23:39:01,226 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:01,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:01,226 INFO L82 PathProgramCache]: Analyzing trace with hash -614469769, now seen corresponding path program 88 times [2018-09-30 23:39:01,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:01,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:01,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:01,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:01,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:02,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:02,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:02,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:39:03,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:39:03,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:03,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:03,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:03,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2018-09-30 23:39:03,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:39:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:39:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:39:03,338 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand 66 states. [2018-09-30 23:39:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:05,295 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2018-09-30 23:39:05,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:39:05,295 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 244 [2018-09-30 23:39:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:05,296 INFO L225 Difference]: With dead ends: 252 [2018-09-30 23:39:05,296 INFO L226 Difference]: Without dead ends: 250 [2018-09-30 23:39:05,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5987, Invalid=10015, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:39:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-09-30 23:39:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2018-09-30 23:39:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 23:39:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2018-09-30 23:39:05,340 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2018-09-30 23:39:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:05,340 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2018-09-30 23:39:05,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:39:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2018-09-30 23:39:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:39:05,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:05,341 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 60, 1, 1, 1, 1] [2018-09-30 23:39:05,342 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:05,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1163771499, now seen corresponding path program 89 times [2018-09-30 23:39:05,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:05,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:05,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:05,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:05,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:10,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:10,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:10,323 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:39:10,734 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2018-09-30 23:39:10,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:10,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:16,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:16,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 184 [2018-09-30 23:39:16,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-09-30 23:39:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-09-30 23:39:16,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7748, Invalid=26292, Unknown=0, NotChecked=0, Total=34040 [2018-09-30 23:39:16,650 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 185 states. [2018-09-30 23:39:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:20,130 INFO L93 Difference]: Finished difference Result 377 states and 379 transitions. [2018-09-30 23:39:20,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:39:20,131 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 248 [2018-09-30 23:39:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:20,132 INFO L225 Difference]: With dead ends: 377 [2018-09-30 23:39:20,132 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:39:20,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12690 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=15128, Invalid=44652, Unknown=0, NotChecked=0, Total=59780 [2018-09-30 23:39:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:39:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 23:39:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:39:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-09-30 23:39:20,177 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2018-09-30 23:39:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:20,178 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-09-30 23:39:20,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-09-30 23:39:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-09-30 23:39:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:39:20,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:20,179 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-09-30 23:39:20,179 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:20,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1439425895, now seen corresponding path program 90 times [2018-09-30 23:39:20,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:20,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:20,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:20,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:20,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:25,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:25,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:25,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:39:25,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 23:39:25,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:25,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:31,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:31,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 185 [2018-09-30 23:39:31,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-09-30 23:39:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-09-30 23:39:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=26599, Unknown=0, NotChecked=0, Total=34410 [2018-09-30 23:39:31,445 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 186 states. [2018-09-30 23:39:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:34,920 INFO L93 Difference]: Finished difference Result 379 states and 381 transitions. [2018-09-30 23:39:34,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:39:34,920 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 250 [2018-09-30 23:39:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:34,921 INFO L225 Difference]: With dead ends: 379 [2018-09-30 23:39:34,921 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:39:34,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12812 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=15436, Invalid=45326, Unknown=0, NotChecked=0, Total=60762 [2018-09-30 23:39:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:39:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:39:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:39:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2018-09-30 23:39:34,961 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2018-09-30 23:39:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:34,961 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2018-09-30 23:39:34,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-09-30 23:39:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2018-09-30 23:39:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:39:34,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:34,962 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 1, 1, 1, 1] [2018-09-30 23:39:34,963 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:34,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash 55328099, now seen corresponding path program 91 times [2018-09-30 23:39:34,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:34,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:34,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:34,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:34,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:36,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:36,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:36,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:36,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:37,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:37,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2018-09-30 23:39:37,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:39:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:39:37,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:39:37,059 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 68 states. [2018-09-30 23:39:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:38,976 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-30 23:39:38,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:39:38,976 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 252 [2018-09-30 23:39:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:38,977 INFO L225 Difference]: With dead ends: 260 [2018-09-30 23:39:38,977 INFO L226 Difference]: Without dead ends: 258 [2018-09-30 23:39:38,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6372, Invalid=10658, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:39:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-09-30 23:39:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-09-30 23:39:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:39:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-09-30 23:39:39,021 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 252 [2018-09-30 23:39:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:39,021 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-09-30 23:39:39,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:39:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-09-30 23:39:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 23:39:39,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:39,022 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 62, 1, 1, 1, 1] [2018-09-30 23:39:39,022 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:39,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:39,023 INFO L82 PathProgramCache]: Analyzing trace with hash -514247081, now seen corresponding path program 92 times [2018-09-30 23:39:39,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:39,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:39,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:39,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:39,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4032 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:44,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:44,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:44,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:39:44,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:39:44,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:44,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4030 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:39:50,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:50,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126] total 189 [2018-09-30 23:39:50,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-09-30 23:39:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-09-30 23:39:50,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8127, Invalid=27783, Unknown=0, NotChecked=0, Total=35910 [2018-09-30 23:39:50,526 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 190 states. [2018-09-30 23:39:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:53,668 INFO L93 Difference]: Finished difference Result 389 states and 391 transitions. [2018-09-30 23:39:53,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:39:53,668 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 256 [2018-09-30 23:39:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:53,669 INFO L225 Difference]: With dead ends: 389 [2018-09-30 23:39:53,669 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:39:53,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13423 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=16001, Invalid=47251, Unknown=0, NotChecked=0, Total=63252 [2018-09-30 23:39:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:39:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 23:39:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:39:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-09-30 23:39:53,717 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2018-09-30 23:39:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:53,717 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-09-30 23:39:53,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-09-30 23:39:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-09-30 23:39:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:39:53,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:53,718 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-09-30 23:39:53,718 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:53,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1080123053, now seen corresponding path program 93 times [2018-09-30 23:39:53,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:53,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:53,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:53,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:53,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:59,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:59,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:59,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:39:59,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 23:39:59,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:59,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:06,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:06,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 191 [2018-09-30 23:40:06,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-09-30 23:40:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-09-30 23:40:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8319, Invalid=28353, Unknown=0, NotChecked=0, Total=36672 [2018-09-30 23:40:06,014 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 192 states. [2018-09-30 23:40:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:09,499 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-09-30 23:40:09,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:40:09,499 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 258 [2018-09-30 23:40:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:09,500 INFO L225 Difference]: With dead ends: 391 [2018-09-30 23:40:09,500 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:40:09,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13673 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=16446, Invalid=48324, Unknown=0, NotChecked=0, Total=64770 [2018-09-30 23:40:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:40:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:40:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:40:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-09-30 23:40:09,548 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2018-09-30 23:40:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:09,548 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-09-30 23:40:09,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-09-30 23:40:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-09-30 23:40:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:40:09,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:09,549 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 1, 1, 1, 1] [2018-09-30 23:40:09,549 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:09,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:09,550 INFO L82 PathProgramCache]: Analyzing trace with hash 573914447, now seen corresponding path program 94 times [2018-09-30 23:40:09,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:09,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:09,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:09,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:09,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:11,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:11,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:11,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:40:12,045 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:40:12,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:12,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:12,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:12,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-09-30 23:40:12,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:40:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:40:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=2617, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:40:12,258 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 71 states. [2018-09-30 23:40:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:14,263 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2018-09-30 23:40:14,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:40:14,264 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 260 [2018-09-30 23:40:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:14,265 INFO L225 Difference]: With dead ends: 268 [2018-09-30 23:40:14,265 INFO L226 Difference]: Without dead ends: 266 [2018-09-30 23:40:14,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6769, Invalid=11321, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:40:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-09-30 23:40:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2018-09-30 23:40:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:40:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2018-09-30 23:40:14,313 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 260 [2018-09-30 23:40:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:14,314 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2018-09-30 23:40:14,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:40:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2018-09-30 23:40:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 23:40:14,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:14,315 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 64, 1, 1, 1, 1] [2018-09-30 23:40:14,315 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:14,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:14,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1655201859, now seen corresponding path program 95 times [2018-09-30 23:40:14,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:14,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:14,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:14,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:14,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4290 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:19,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:19,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:19,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:40:20,293 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 23:40:20,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:20,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4290 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:27,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:27,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 196 [2018-09-30 23:40:27,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-09-30 23:40:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-09-30 23:40:27,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8776, Invalid=29836, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 23:40:27,028 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand 197 states. [2018-09-30 23:40:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:31,001 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-09-30 23:40:31,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:40:31,001 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 264 [2018-09-30 23:40:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:31,002 INFO L225 Difference]: With dead ends: 401 [2018-09-30 23:40:31,002 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:40:31,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14432 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=17160, Invalid=50700, Unknown=0, NotChecked=0, Total=67860 [2018-09-30 23:40:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:40:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 23:40:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 23:40:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-09-30 23:40:31,051 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2018-09-30 23:40:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:31,051 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-09-30 23:40:31,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-09-30 23:40:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-09-30 23:40:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:40:31,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:31,053 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-09-30 23:40:31,053 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:31,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1967198015, now seen corresponding path program 96 times [2018-09-30 23:40:31,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:31,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:31,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:31,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:31,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4290 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:36,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:36,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:36,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:40:37,165 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-30 23:40:37,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:37,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4290 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:43,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:43,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 197 [2018-09-30 23:40:43,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-09-30 23:40:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-09-30 23:40:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8843, Invalid=30163, Unknown=0, NotChecked=0, Total=39006 [2018-09-30 23:40:43,871 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 198 states. [2018-09-30 23:40:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:47,852 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2018-09-30 23:40:47,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:40:47,852 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 266 [2018-09-30 23:40:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:47,853 INFO L225 Difference]: With dead ends: 403 [2018-09-30 23:40:47,853 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:40:47,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14562 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=17488, Invalid=51418, Unknown=0, NotChecked=0, Total=68906 [2018-09-30 23:40:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:40:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 23:40:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 23:40:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2018-09-30 23:40:47,903 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2018-09-30 23:40:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:47,903 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2018-09-30 23:40:47,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-09-30 23:40:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2018-09-30 23:40:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:40:47,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:47,904 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 65, 1, 1, 1, 1] [2018-09-30 23:40:47,904 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:47,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1147793211, now seen corresponding path program 97 times [2018-09-30 23:40:47,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:47,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:47,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:47,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:47,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4422 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:49,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:49,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:49,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:40:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:50,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4422 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:50,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:50,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2018-09-30 23:40:50,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:40:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:40:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2492, Invalid=2764, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:40:50,451 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand 73 states. [2018-09-30 23:40:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:52,775 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2018-09-30 23:40:52,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:40:52,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 268 [2018-09-30 23:40:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:52,777 INFO L225 Difference]: With dead ends: 276 [2018-09-30 23:40:52,777 INFO L226 Difference]: Without dead ends: 274 [2018-09-30 23:40:52,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7178, Invalid=12004, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:40:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-09-30 23:40:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2018-09-30 23:40:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 23:40:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2018-09-30 23:40:52,826 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 268 [2018-09-30 23:40:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:52,826 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2018-09-30 23:40:52,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:40:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2018-09-30 23:40:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:40:52,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:52,827 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 66, 1, 1, 1, 1] [2018-09-30 23:40:52,827 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:52,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash 370818095, now seen corresponding path program 98 times [2018-09-30 23:40:52,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:52,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:52,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:52,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:40:52,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4556 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:58,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:40:58,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:40:58,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:40:58,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:40:58,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:58,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4554 proven. 4422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:41:05,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:05,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 134] total 201 [2018-09-30 23:41:05,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-09-30 23:41:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-09-30 23:41:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9179, Invalid=31423, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:41:05,842 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand 202 states. [2018-09-30 23:41:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:09,533 INFO L93 Difference]: Finished difference Result 413 states and 415 transitions. [2018-09-30 23:41:09,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:41:09,533 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 272 [2018-09-30 23:41:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:09,534 INFO L225 Difference]: With dead ends: 413 [2018-09-30 23:41:09,534 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:41:09,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15213 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18089, Invalid=53467, Unknown=0, NotChecked=0, Total=71556 [2018-09-30 23:41:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:41:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 23:41:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:41:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-09-30 23:41:09,592 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2018-09-30 23:41:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:09,593 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-09-30 23:41:09,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-09-30 23:41:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-09-30 23:41:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 23:41:09,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:09,594 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-09-30 23:41:09,594 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:09,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:09,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2021511381, now seen corresponding path program 99 times [2018-09-30 23:41:09,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:09,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:09,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:09,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:09,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4556 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:15,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:15,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:15,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:41:16,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2018-09-30 23:41:16,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:16,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4556 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:23,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:23,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 203 [2018-09-30 23:41:23,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-09-30 23:41:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-09-30 23:41:23,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9383, Invalid=32029, Unknown=0, NotChecked=0, Total=41412 [2018-09-30 23:41:23,497 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 204 states. [2018-09-30 23:41:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:27,670 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2018-09-30 23:41:27,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:41:27,670 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 274 [2018-09-30 23:41:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:27,671 INFO L225 Difference]: With dead ends: 415 [2018-09-30 23:41:27,671 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 23:41:27,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15479 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=18562, Invalid=54608, Unknown=0, NotChecked=0, Total=73170 [2018-09-30 23:41:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 23:41:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 23:41:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 23:41:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2018-09-30 23:41:27,783 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2018-09-30 23:41:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:27,783 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2018-09-30 23:41:27,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-09-30 23:41:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2018-09-30 23:41:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 23:41:27,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:27,785 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 67, 1, 1, 1, 1] [2018-09-30 23:41:27,785 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:27,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1052332839, now seen corresponding path program 100 times [2018-09-30 23:41:27,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:27,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:27,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:27,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:27,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4692 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:29,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:29,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:29,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:41:30,139 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:41:30,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:30,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4692 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:30,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:30,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 74 [2018-09-30 23:41:30,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:41:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:41:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2635, Invalid=2915, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:41:30,371 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 75 states. [2018-09-30 23:41:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:33,023 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-09-30 23:41:33,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:41:33,023 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 276 [2018-09-30 23:41:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:33,024 INFO L225 Difference]: With dead ends: 284 [2018-09-30 23:41:33,024 INFO L226 Difference]: Without dead ends: 282 [2018-09-30 23:41:33,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7599, Invalid=12707, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:41:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-09-30 23:41:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-09-30 23:41:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 23:41:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-09-30 23:41:33,096 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 276 [2018-09-30 23:41:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:33,096 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-09-30 23:41:33,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:41:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-09-30 23:41:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-30 23:41:33,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:33,097 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 68, 1, 1, 1, 1] [2018-09-30 23:41:33,097 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:33,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -788674021, now seen corresponding path program 101 times [2018-09-30 23:41:33,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:33,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:33,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4830 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:39,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:39,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:39,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:41:39,703 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 23:41:39,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:39,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4830 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:47,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:47,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 208 [2018-09-30 23:41:47,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-09-30 23:41:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-09-30 23:41:47,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9868, Invalid=33604, Unknown=0, NotChecked=0, Total=43472 [2018-09-30 23:41:47,142 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 209 states. [2018-09-30 23:41:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:51,346 INFO L93 Difference]: Finished difference Result 425 states and 427 transitions. [2018-09-30 23:41:51,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:41:51,347 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 280 [2018-09-30 23:41:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:51,348 INFO L225 Difference]: With dead ends: 425 [2018-09-30 23:41:51,348 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 23:41:51,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16286 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=19320, Invalid=57132, Unknown=0, NotChecked=0, Total=76452 [2018-09-30 23:41:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 23:41:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 23:41:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:41:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-09-30 23:41:51,404 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2018-09-30 23:41:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:51,404 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-09-30 23:41:51,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-09-30 23:41:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-09-30 23:41:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:41:51,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:51,405 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-09-30 23:41:51,406 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:51,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1884225257, now seen corresponding path program 102 times [2018-09-30 23:41:51,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:51,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:51,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:51,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:51,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4830 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:57,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:57,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:58,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:41:58,486 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 23:41:58,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:58,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4830 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:05,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:05,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 209 [2018-09-30 23:42:05,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-09-30 23:42:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-09-30 23:42:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9939, Invalid=33951, Unknown=0, NotChecked=0, Total=43890 [2018-09-30 23:42:05,822 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 210 states. [2018-09-30 23:42:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:10,257 INFO L93 Difference]: Finished difference Result 427 states and 429 transitions. [2018-09-30 23:42:10,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 23:42:10,258 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 282 [2018-09-30 23:42:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:10,258 INFO L225 Difference]: With dead ends: 427 [2018-09-30 23:42:10,258 INFO L226 Difference]: Without dead ends: 285 [2018-09-30 23:42:10,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16424 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=19668, Invalid=57894, Unknown=0, NotChecked=0, Total=77562 [2018-09-30 23:42:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-09-30 23:42:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-09-30 23:42:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-09-30 23:42:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2018-09-30 23:42:10,317 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2018-09-30 23:42:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:10,318 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2018-09-30 23:42:10,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-09-30 23:42:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2018-09-30 23:42:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 23:42:10,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:10,319 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 69, 1, 1, 1, 1] [2018-09-30 23:42:10,319 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:10,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1852991763, now seen corresponding path program 103 times [2018-09-30 23:42:10,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:10,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:10,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:10,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:10,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4970 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:12,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:12,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:12,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:42:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:12,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4970 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:13,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:13,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-09-30 23:42:13,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:42:13,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:42:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2782, Invalid=3070, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:42:13,496 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand 77 states. [2018-09-30 23:42:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:15,826 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2018-09-30 23:42:15,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:42:15,827 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 284 [2018-09-30 23:42:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:15,828 INFO L225 Difference]: With dead ends: 292 [2018-09-30 23:42:15,828 INFO L226 Difference]: Without dead ends: 290 [2018-09-30 23:42:15,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8032, Invalid=13430, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:42:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-09-30 23:42:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2018-09-30 23:42:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-30 23:42:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2018-09-30 23:42:15,890 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2018-09-30 23:42:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:15,891 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2018-09-30 23:42:15,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:42:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2018-09-30 23:42:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-30 23:42:15,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:15,892 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 70, 1, 1, 1, 1] [2018-09-30 23:42:15,892 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:15,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1323169273, now seen corresponding path program 104 times [2018-09-30 23:42:15,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:15,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:15,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:15,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:42:15,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 5112 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:22,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:22,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:22,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:42:22,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:42:22,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:22,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 5110 proven. 4970 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:42:30,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:30,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 142] total 213 [2018-09-30 23:42:30,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-09-30 23:42:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-09-30 23:42:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10295, Invalid=35287, Unknown=0, NotChecked=0, Total=45582 [2018-09-30 23:42:30,591 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 214 states. [2018-09-30 23:42:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:35,106 INFO L93 Difference]: Finished difference Result 437 states and 439 transitions. [2018-09-30 23:42:35,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:42:35,106 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 288 [2018-09-30 23:42:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:35,106 INFO L225 Difference]: With dead ends: 437 [2018-09-30 23:42:35,107 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:42:35,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17115 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=20305, Invalid=60067, Unknown=0, NotChecked=0, Total=80372 [2018-09-30 23:42:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:42:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 23:42:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 23:42:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-09-30 23:42:35,168 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2018-09-30 23:42:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:35,168 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-09-30 23:42:35,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-09-30 23:42:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-09-30 23:42:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 23:42:35,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:35,169 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-09-30 23:42:35,169 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:35,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1872528643, now seen corresponding path program 105 times [2018-09-30 23:42:35,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:35,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:35,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:35,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:35,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5112 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:41,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:41,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:41,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:42:42,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 23:42:42,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:42,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5112 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:50,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:50,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 215 [2018-09-30 23:42:50,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-09-30 23:42:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-09-30 23:42:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10511, Invalid=35929, Unknown=0, NotChecked=0, Total=46440 [2018-09-30 23:42:50,524 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 216 states. [2018-09-30 23:42:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:55,347 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2018-09-30 23:42:55,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:42:55,347 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 290 [2018-09-30 23:42:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:55,348 INFO L225 Difference]: With dead ends: 439 [2018-09-30 23:42:55,348 INFO L226 Difference]: Without dead ends: 293 [2018-09-30 23:42:55,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17397 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=20806, Invalid=61276, Unknown=0, NotChecked=0, Total=82082 [2018-09-30 23:42:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-30 23:42:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-09-30 23:42:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 23:42:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2018-09-30 23:42:55,410 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2018-09-30 23:42:55,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:55,410 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2018-09-30 23:42:55,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-09-30 23:42:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2018-09-30 23:42:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 23:42:55,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:55,411 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 71, 1, 1, 1, 1] [2018-09-30 23:42:55,411 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:55,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2036609279, now seen corresponding path program 106 times [2018-09-30 23:42:55,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:55,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:55,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5256 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:57,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:42:57,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:42:57,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:42:58,059 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:42:58,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:58,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5256 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:58,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:42:58,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 78 [2018-09-30 23:42:58,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:42:58,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:42:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2933, Invalid=3229, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:42:58,291 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand 79 states. [2018-09-30 23:43:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:00,914 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2018-09-30 23:43:00,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:43:00,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 292 [2018-09-30 23:43:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:00,915 INFO L225 Difference]: With dead ends: 300 [2018-09-30 23:43:00,915 INFO L226 Difference]: Without dead ends: 298 [2018-09-30 23:43:00,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5403 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8477, Invalid=14173, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:43:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-09-30 23:43:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2018-09-30 23:43:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-09-30 23:43:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2018-09-30 23:43:00,985 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 292 [2018-09-30 23:43:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:00,985 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2018-09-30 23:43:00,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:43:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2018-09-30 23:43:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-09-30 23:43:00,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:00,986 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 72, 1, 1, 1, 1] [2018-09-30 23:43:00,987 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:00,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash -589956109, now seen corresponding path program 107 times [2018-09-30 23:43:00,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:00,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:00,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:00,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:00,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5402 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:07,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:07,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:07,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:08,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2018-09-30 23:43:08,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:08,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5402 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:17,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:17,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 220 [2018-09-30 23:43:17,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-09-30 23:43:17,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-09-30 23:43:17,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11024, Invalid=37596, Unknown=0, NotChecked=0, Total=48620 [2018-09-30 23:43:17,080 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 221 states. [2018-09-30 23:43:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:21,744 INFO L93 Difference]: Finished difference Result 449 states and 451 transitions. [2018-09-30 23:43:21,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:43:21,745 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 296 [2018-09-30 23:43:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:21,745 INFO L225 Difference]: With dead ends: 449 [2018-09-30 23:43:21,745 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 23:43:21,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18252 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=21608, Invalid=63948, Unknown=0, NotChecked=0, Total=85556 [2018-09-30 23:43:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 23:43:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-30 23:43:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 23:43:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-09-30 23:43:21,807 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2018-09-30 23:43:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:21,808 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-09-30 23:43:21,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-09-30 23:43:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-09-30 23:43:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 23:43:21,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:21,809 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-09-30 23:43:21,809 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:21,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash 294894319, now seen corresponding path program 108 times [2018-09-30 23:43:21,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:21,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:21,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:21,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:21,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5402 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:28,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:28,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:28,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:43:29,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-30 23:43:29,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:29,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5402 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:37,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:37,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 221 [2018-09-30 23:43:37,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-09-30 23:43:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-09-30 23:43:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11099, Invalid=37963, Unknown=0, NotChecked=0, Total=49062 [2018-09-30 23:43:37,883 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 222 states. [2018-09-30 23:43:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:42,915 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-09-30 23:43:42,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:43:42,915 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 298 [2018-09-30 23:43:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:42,916 INFO L225 Difference]: With dead ends: 451 [2018-09-30 23:43:42,916 INFO L226 Difference]: Without dead ends: 301 [2018-09-30 23:43:42,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18398 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=21976, Invalid=64754, Unknown=0, NotChecked=0, Total=86730 [2018-09-30 23:43:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-09-30 23:43:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-09-30 23:43:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 23:43:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-09-30 23:43:42,979 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2018-09-30 23:43:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:42,979 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-09-30 23:43:42,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-09-30 23:43:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-09-30 23:43:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-30 23:43:42,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:42,980 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 73, 1, 1, 1, 1] [2018-09-30 23:43:42,980 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:42,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash 232631019, now seen corresponding path program 109 times [2018-09-30 23:43:42,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:42,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:42,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:42,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:42,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5550 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:45,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:45,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:45,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:46,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5550 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:46,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:46,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 80 [2018-09-30 23:43:46,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:43:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:43:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3088, Invalid=3392, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:43:46,290 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 81 states. [2018-09-30 23:43:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:48,851 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-09-30 23:43:48,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:43:48,852 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 300 [2018-09-30 23:43:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:48,853 INFO L225 Difference]: With dead ends: 308 [2018-09-30 23:43:48,853 INFO L226 Difference]: Without dead ends: 306 [2018-09-30 23:43:48,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5701 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8934, Invalid=14936, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:43:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-09-30 23:43:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-09-30 23:43:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-30 23:43:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-09-30 23:43:48,918 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 300 [2018-09-30 23:43:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:48,918 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-09-30 23:43:48,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:43:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-09-30 23:43:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-30 23:43:48,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:48,919 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 74, 1, 1, 1, 1] [2018-09-30 23:43:48,919 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:48,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1122541535, now seen corresponding path program 110 times [2018-09-30 23:43:48,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:48,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:48,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:48,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:48,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5700 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:56,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:56,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:56,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:56,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:56,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5698 proven. 5550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:44:05,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:05,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 150] total 225 [2018-09-30 23:44:05,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-09-30 23:44:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-09-30 23:44:05,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11475, Invalid=39375, Unknown=0, NotChecked=0, Total=50850 [2018-09-30 23:44:05,026 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 226 states. [2018-09-30 23:44:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:10,175 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2018-09-30 23:44:10,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 23:44:10,175 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 304 [2018-09-30 23:44:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:10,176 INFO L225 Difference]: With dead ends: 461 [2018-09-30 23:44:10,176 INFO L226 Difference]: Without dead ends: 307 [2018-09-30 23:44:10,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19129 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=22649, Invalid=67051, Unknown=0, NotChecked=0, Total=89700 [2018-09-30 23:44:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-30 23:44:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-30 23:44:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-30 23:44:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-09-30 23:44:10,268 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 304 [2018-09-30 23:44:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:10,269 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-09-30 23:44:10,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-09-30 23:44:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-09-30 23:44:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-30 23:44:10,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:10,270 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-09-30 23:44:10,270 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:10,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash 677749467, now seen corresponding path program 111 times [2018-09-30 23:44:10,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:10,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:10,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:10,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:10,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5700 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:17,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:17,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:17,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:18,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 23:44:18,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:18,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5700 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:26,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:26,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 227 [2018-09-30 23:44:26,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-09-30 23:44:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-09-30 23:44:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11703, Invalid=40053, Unknown=0, NotChecked=0, Total=51756 [2018-09-30 23:44:26,981 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 228 states. [2018-09-30 23:44:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:32,069 INFO L93 Difference]: Finished difference Result 463 states and 465 transitions. [2018-09-30 23:44:32,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 23:44:32,069 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 306 [2018-09-30 23:44:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:32,070 INFO L225 Difference]: With dead ends: 463 [2018-09-30 23:44:32,070 INFO L226 Difference]: Without dead ends: 309 [2018-09-30 23:44:32,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19427 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=23178, Invalid=68328, Unknown=0, NotChecked=0, Total=91506 [2018-09-30 23:44:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-09-30 23:44:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-09-30 23:44:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-09-30 23:44:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-09-30 23:44:32,137 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2018-09-30 23:44:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:32,137 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-09-30 23:44:32,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-09-30 23:44:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-09-30 23:44:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-30 23:44:32,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:32,138 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 75, 1, 1, 1, 1] [2018-09-30 23:44:32,138 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:32,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:32,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1565665577, now seen corresponding path program 112 times [2018-09-30 23:44:32,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:32,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:32,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:32,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:32,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5852 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:34,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:34,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:34,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:35,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:35,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:35,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5852 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:35,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:35,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-09-30 23:44:35,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:44:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:44:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3247, Invalid=3559, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:44:35,243 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 83 states. [2018-09-30 23:44:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:38,079 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2018-09-30 23:44:38,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:44:38,079 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 308 [2018-09-30 23:44:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:38,080 INFO L225 Difference]: With dead ends: 316 [2018-09-30 23:44:38,080 INFO L226 Difference]: Without dead ends: 314 [2018-09-30 23:44:38,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9403, Invalid=15719, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:44:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-09-30 23:44:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2018-09-30 23:44:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-09-30 23:44:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2018-09-30 23:44:38,180 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 308 [2018-09-30 23:44:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:38,180 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2018-09-30 23:44:38,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:44:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2018-09-30 23:44:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-09-30 23:44:38,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:38,181 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 76, 1, 1, 1, 1] [2018-09-30 23:44:38,181 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:38,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1521022411, now seen corresponding path program 113 times [2018-09-30 23:44:38,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:38,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:38,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:44:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 6006 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:45,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:44:45,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:44:45,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:44:46,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 23:44:46,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:46,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 6006 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:55,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:44:55,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 232 [2018-09-30 23:44:55,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 233 states [2018-09-30 23:44:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2018-09-30 23:44:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12244, Invalid=41812, Unknown=0, NotChecked=0, Total=54056 [2018-09-30 23:44:55,451 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 233 states. [2018-09-30 23:45:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:00,664 INFO L93 Difference]: Finished difference Result 473 states and 475 transitions. [2018-09-30 23:45:00,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:45:00,665 INFO L78 Accepts]: Start accepts. Automaton has 233 states. Word has length 312 [2018-09-30 23:45:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:00,665 INFO L225 Difference]: With dead ends: 473 [2018-09-30 23:45:00,665 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:45:00,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20330 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=24024, Invalid=71148, Unknown=0, NotChecked=0, Total=95172 [2018-09-30 23:45:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:45:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-30 23:45:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 23:45:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-09-30 23:45:00,733 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2018-09-30 23:45:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:00,733 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-09-30 23:45:00,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 233 states. [2018-09-30 23:45:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-09-30 23:45:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-30 23:45:00,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:00,735 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-09-30 23:45:00,735 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:00,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:00,735 INFO L82 PathProgramCache]: Analyzing trace with hash -278840121, now seen corresponding path program 114 times [2018-09-30 23:45:00,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:00,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:00,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:00,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:00,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6006 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:08,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:08,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:08,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:09,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2018-09-30 23:45:09,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:09,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6006 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:18,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:18,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 233 [2018-09-30 23:45:18,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-09-30 23:45:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-09-30 23:45:18,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12323, Invalid=42199, Unknown=0, NotChecked=0, Total=54522 [2018-09-30 23:45:18,144 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 234 states. [2018-09-30 23:45:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:23,363 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2018-09-30 23:45:23,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:45:23,363 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 314 [2018-09-30 23:45:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:23,364 INFO L225 Difference]: With dead ends: 475 [2018-09-30 23:45:23,364 INFO L226 Difference]: Without dead ends: 317 [2018-09-30 23:45:23,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20484 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=24412, Invalid=71998, Unknown=0, NotChecked=0, Total=96410 [2018-09-30 23:45:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-09-30 23:45:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-09-30 23:45:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 23:45:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2018-09-30 23:45:23,427 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 314 [2018-09-30 23:45:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:23,427 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2018-09-30 23:45:23,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-09-30 23:45:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2018-09-30 23:45:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 23:45:23,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:23,428 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 77, 1, 1, 1, 1] [2018-09-30 23:45:23,428 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:23,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash 925086915, now seen corresponding path program 115 times [2018-09-30 23:45:23,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:23,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:23,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:23,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:23,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:45:25,474 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:45:25,478 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:45:25,478 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:45:25 BoogieIcfgContainer [2018-09-30 23:45:25,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:45:25,479 INFO L168 Benchmark]: Toolchain (without parser) took 764807.54 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 409.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 388.6 MB). Peak memory consumption was 798.0 MB. Max. memory is 7.1 GB. [2018-09-30 23:45:25,480 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:45:25,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:45:25,480 INFO L168 Benchmark]: Boogie Preprocessor took 22.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:45:25,480 INFO L168 Benchmark]: RCFGBuilder took 386.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:45:25,480 INFO L168 Benchmark]: TraceAbstraction took 764349.60 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 409.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 367.4 MB). Peak memory consumption was 776.9 MB. Max. memory is 7.1 GB. [2018-09-30 23:45:25,482 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 0.23 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 42.50 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 22.80 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 386.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 764349.60 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 409.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 367.4 MB). Peak memory consumption was 776.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 75). Cancelled while BasicCegarLoop was analyzing trace of length 317 with TraceHistMax 79, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 71 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 764.2s OverallTime, 117 OverallIterations, 79 TraceHistogramMax, 202.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4988 SDtfs, 4076 SDslu, 67808 SDs, 0 SdLazy, 71469 SolverSat, 9404 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32307 GetRequests, 16993 SyntacticMatches, 0 SemanticMatches, 15314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619244 ImplicationChecksByTransitivity, 637.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=317occurred in iteration=116, 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: 3.2s AutomataMinimizationTime, 116 MinimizatonAttempts, 38 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.6s SsaConstructionTime, 25.7s SatisfiabilityAnalysisTime, 520.8s InterpolantComputationTime, 37246 NumberOfCodeBlocks, 37246 NumberOfCodeBlocksAsserted, 2567 NumberOfCheckSat, 37016 ConstructedInterpolants, 0 QuantifiedInterpolants, 30857831 SizeOfPredicates, 356 NumberOfNonLiveVariables, 101476 ConjunctsInSsa, 9550 ConjunctsInUnsatCore, 230 InterpolantComputations, 2 PerfectInterpolantSequences, 477490/942990 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/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-45-25-490.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-45-25-490.csv Completed graceful shutdown