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-d19836b [2018-09-26 21:20:47,759 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:20:47,761 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:20:47,773 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-26 21:20:47,804 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 [2018-09-26 21:20:47,824 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:20:47,825 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:20:47,826 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:20:47,826 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:20:47,830 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:20:47,831 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:20:47,831 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:20:47,831 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:20:47,831 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:20:47,832 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:20:47,832 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:20:47,832 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:20:47,832 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:20:47,832 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:20:47,833 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:20:47,833 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:20:47,834 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:20:47,834 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:20:47,834 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:20:47,834 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:20:47,834 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:20:47,835 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:20:47,835 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:20:47,835 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:20:47,835 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:20:47,835 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:20:47,839 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:20:47,839 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:20:47,839 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:20:47,839 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:20:47,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:20:47,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:20:47,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:20:47,911 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:20:47,911 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:20:47,912 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-26 21:20:47,912 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-26 21:20:47,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:20:47,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:20:47,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:47,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:20:47,966 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:20:47,984 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:47,995 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:48,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:20:48,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:20:48,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:20:48,015 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,015 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,016 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,016 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,020 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,023 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,024 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 26.09 09:20:47" (1/1) ... [2018-09-26 21:20:48,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:20:48,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:20:48,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:20:48,027 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:20:48,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:47" (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 [2018-09-26 21:20:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:20:48,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:20:48,378 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:20:48,378 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:48 BoogieIcfgContainer [2018-09-26 21:20:48,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:20:48,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:20:48,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:20:48,383 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:20:48,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:47" (1/2) ... [2018-09-26 21:20:48,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c981f6 and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:20:48, skipping insertion in model container [2018-09-26 21:20:48,385 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 26.09 09:20:48" (2/2) ... [2018-09-26 21:20:48,387 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-26 21:20:48,398 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:20:48,406 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:20:48,457 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:20:48,458 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:20:48,458 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:20:48,459 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:20:48,459 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:20:48,459 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:20:48,459 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:20:48,459 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:20:48,459 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:20:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:20:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:20:48,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:48,483 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:20:48,484 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:48,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-26 21:20:48,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:48,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:48,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:48,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:48,710 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:20:48,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:20:48,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:20:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:20:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:20:48,728 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-26 21:20:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:48,945 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-26 21:20:48,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:20:48,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:20:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:48,958 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:20:48,958 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:20:48,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:20:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-26 21:20:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:20:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:20:48,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-26 21:20:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:48,993 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:20:48,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:20:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:20:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:20:48,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:48,994 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:20:48,995 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:48,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-26 21:20:48,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:48,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:48,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:48,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,057 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:20:49,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:20:49,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:20:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:20:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:20:49,060 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-26 21:20:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:49,128 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-26 21:20:49,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:20:49,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:20:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:49,130 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:20:49,130 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:20:49,131 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 [2018-09-26 21:20:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:20:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:20:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:20:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:20:49,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:20:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:49,135 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:20:49,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:20:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:20:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:20:49,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:49,136 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:20:49,137 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:49,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-26 21:20:49,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:49,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:49,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:49,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:49,286 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 [2018-09-26 21:20:49,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:49,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:49,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-26 21:20:49,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:20:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:20:49,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:20:49,695 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-26 21:20:50,107 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-26 21:20:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:50,233 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-26 21:20:50,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:20:50,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-26 21:20:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:50,236 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:20:50,237 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:20:50,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:20:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:20:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:20:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:20:50,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-26 21:20:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:50,244 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:20:50,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:20:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:20:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:20:50,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:50,246 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-26 21:20:50,246 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:50,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:50,247 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-26 21:20:50,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:50,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:50,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:50,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:50,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:50,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:50,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:50,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:50,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:50,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-26 21:20:50,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:50,890 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-26 21:20:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:51,263 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-26 21:20:51,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:20:51,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-26 21:20:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:51,265 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:20:51,265 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:20:51,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:20:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:20:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:20:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:20:51,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-26 21:20:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:51,273 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:20:51,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:20:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:20:51,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:51,275 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-26 21:20:51,275 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:51,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:51,275 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-26 21:20:51,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:51,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:51,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:51,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:51,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:51,412 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 [2018-09-26 21:20:51,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:51,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:20:51,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:51,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:51,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-26 21:20:51,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:51,570 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-26 21:20:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:51,763 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-26 21:20:51,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:20:51,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-26 21:20:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:51,765 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:20:51,765 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:20:51,766 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 [2018-09-26 21:20:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:20:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:20:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:20:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:20:51,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-26 21:20:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:51,774 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:20:51,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:20:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:20:51,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:51,775 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-26 21:20:51,776 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:51,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-26 21:20:51,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:51,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:51,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:51,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:51,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:51,943 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 [2018-09-26 21:20:51,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:51,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:51,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:51,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:52,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:52,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-26 21:20:52,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:20:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:20:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:52,044 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-26 21:20:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:52,305 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-26 21:20:52,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:20:52,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-26 21:20:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:52,307 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:20:52,308 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:20:52,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:20:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-26 21:20:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:20:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:20:52,316 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-26 21:20:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:52,316 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:20:52,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:20:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:20:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:20:52,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:52,317 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-26 21:20:52,318 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:52,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-26 21:20:52,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:52,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:52,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:52,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:52,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:52,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:52,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:52,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:52,586 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:20:52,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:52,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:52,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:52,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-26 21:20:52,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:20:52,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:20:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:52,884 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-26 21:20:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:53,066 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-26 21:20:53,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:20:53,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-26 21:20:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:53,070 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:20:53,071 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:20:53,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:20:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:20:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:20:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:20:53,077 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-26 21:20:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:53,078 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:20:53,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:20:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:20:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:20:53,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:53,079 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-26 21:20:53,079 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:53,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-26 21:20:53,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:53,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:53,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:53,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:53,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:53,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:53,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:20:53,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:53,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:53,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-26 21:20:53,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:20:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:20:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:53,457 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-26 21:20:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:53,640 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-26 21:20:53,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:20:53,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-26 21:20:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:53,642 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:20:53,642 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:20:53,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:20:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:20:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:20:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:20:53,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-26 21:20:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:53,648 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:20:53,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:20:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:20:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:20:53,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:53,649 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-26 21:20:53,650 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:53,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-26 21:20:53,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:53,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:53,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:53,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:53,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:53,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:54,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:54,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-26 21:20:54,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:54,066 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-26 21:20:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:54,432 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-26 21:20:54,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:20:54,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-26 21:20:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:54,435 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:20:54,435 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:20:54,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:20:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-26 21:20:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:20:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:20:54,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-26 21:20:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:54,443 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:20:54,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:20:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:20:54,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:54,445 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-26 21:20:54,445 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:54,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:54,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-26 21:20:54,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:54,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:54,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:54,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:54,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:54,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:54,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:54,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:54,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:54,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:20:54,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:54,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-26 21:20:54,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:20:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:20:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:54,958 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-26 21:20:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:55,433 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-26 21:20:55,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:20:55,433 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-26 21:20:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:55,434 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:20:55,434 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:20:55,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:20:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:20:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:20:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:20:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:20:55,440 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-26 21:20:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:55,441 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:20:55,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:20:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:20:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:20:55,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:55,442 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-26 21:20:55,442 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:55,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-26 21:20:55,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:55,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:55,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:55,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:55,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:55,715 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 [2018-09-26 21:20:55,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:55,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:20:55,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:55,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:56,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-26 21:20:56,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:20:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:20:56,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:56,216 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-26 21:20:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:56,473 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-26 21:20:56,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:20:56,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-26 21:20:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:56,475 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:20:56,475 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:20:56,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:20:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:20:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:20:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:20:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:20:56,482 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-26 21:20:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:56,483 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:20:56,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:20:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:20:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:20:56,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:56,484 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-26 21:20:56,484 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:56,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-26 21:20:56,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:56,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:56,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:56,854 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 [2018-09-26 21:20:56,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:56,898 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:56,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:56,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:56,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-26 21:20:56,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:20:56,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:20:56,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:56,962 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-26 21:20:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:57,133 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:20:57,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:20:57,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-26 21:20:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:57,135 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:20:57,135 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:20:57,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:20:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-26 21:20:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:20:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:20:57,143 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-26 21:20:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:57,144 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:20:57,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:20:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:20:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:20:57,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:57,145 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-26 21:20:57,145 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:57,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-26 21:20:57,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:57,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:57,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:57,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:57,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:57,464 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 [2018-09-26 21:20:57,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:57,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:20:57,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:57,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:57,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-26 21:20:57,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:20:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:20:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:57,988 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-26 21:20:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:58,353 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-26 21:20:58,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:20:58,353 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-26 21:20:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:58,354 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:20:58,354 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:20:58,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:20:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:20:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:20:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:20:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:20:58,362 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-26 21:20:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:58,362 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:20:58,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:20:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:20:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:20:58,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:58,363 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-26 21:20:58,364 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:58,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:58,364 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-26 21:20:58,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:58,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:58,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:58,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:58,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:59,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:59,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:59,328 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:20:59,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:59,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:59,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-26 21:20:59,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:20:59,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:20:59,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:20:59,583 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-26 21:21:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:00,027 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-26 21:21:00,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:21:00,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-26 21:21:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:00,028 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:21:00,028 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:21:00,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:21:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:21:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:21:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:21:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:21:00,036 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-26 21:21:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:00,036 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:21:00,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:21:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:21:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:21:00,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:00,038 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-26 21:21:00,038 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:00,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-26 21:21:00,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:00,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:00,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:00,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:00,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:00,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:00,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:00,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:00,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:00,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:00,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-26 21:21:00,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:21:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:21:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:21:00,380 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-26 21:21:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:00,575 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-26 21:21:00,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:21:00,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:21:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:00,576 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:21:00,577 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:21:00,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:21:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:21:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-26 21:21:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:21:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:21:00,587 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-26 21:21:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:00,588 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:21:00,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:21:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:21:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:21:00,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:00,589 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-26 21:21:00,589 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:00,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-26 21:21:00,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:00,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:00,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:00,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:00,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:01,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:01,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:01,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:01,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:01,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:01,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:01,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:01,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-26 21:21:01,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:21:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:21:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:21:01,766 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-26 21:21:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:02,039 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-26 21:21:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:21:02,040 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-26 21:21:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:02,040 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:21:02,040 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:21:02,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:21:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:21:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:21:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:21:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:21:02,049 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-26 21:21:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:02,049 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:21:02,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:21:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:21:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:21:02,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:02,050 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-26 21:21:02,050 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:02,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-26 21:21:02,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:02,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:02,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:02,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:02,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:02,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:02,546 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 [2018-09-26 21:21:02,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:02,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:21:02,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:02,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:03,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-26 21:21:03,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:21:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:21:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:21:03,155 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-26 21:21:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:03,391 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-26 21:21:03,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:21:03,392 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-26 21:21:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:03,392 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:21:03,393 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:21:03,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:21:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:21:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:21:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:21:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:21:03,401 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-26 21:21:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:03,401 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:21:03,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:21:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:21:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:21:03,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:03,402 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-26 21:21:03,402 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:03,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-26 21:21:03,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:03,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:03,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:03,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:03,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:03,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:03,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:03,722 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:03,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:03,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:03,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-26 21:21:03,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:21:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:21:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:21:03,785 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-26 21:21:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:04,060 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-26 21:21:04,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:21:04,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-26 21:21:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:04,062 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:21:04,062 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:21:04,063 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 [2018-09-26 21:21:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:21:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-26 21:21:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:21:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:21:04,072 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-26 21:21:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:04,072 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:21:04,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:21:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:21:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:21:04,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:04,073 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-26 21:21:04,073 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:04,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-26 21:21:04,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:04,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:04,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:04,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:04,893 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 [2018-09-26 21:21:04,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:05,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-26 21:21:05,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:05,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:05,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:05,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-26 21:21:05,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:21:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:21:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:21:05,524 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-26 21:21:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:05,803 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-26 21:21:05,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:21:05,804 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-26 21:21:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:05,805 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:21:05,805 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:21:05,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:21:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:21:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:21:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:21:05,814 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-26 21:21:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:05,814 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:21:05,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:21:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:21:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:21:05,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:05,815 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-26 21:21:05,815 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:05,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-26 21:21:05,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:05,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:05,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:05,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:05,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:06,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:06,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:06,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:06,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:21:06,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:06,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:06,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:06,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-26 21:21:06,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:21:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:21:06,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:21:06,882 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-26 21:21:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:07,214 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-26 21:21:07,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:21:07,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-26 21:21:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:07,216 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:21:07,216 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:21:07,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:21:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:21:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:21:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:21:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:21:07,225 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-26 21:21:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:07,226 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:21:07,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:21:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:21:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:21:07,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:07,227 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-26 21:21:07,227 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:07,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-26 21:21:07,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:07,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:07,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:07,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:07,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:07,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:07,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:07,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-26 21:21:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:21:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:21:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:21:07,814 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-26 21:21:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:08,256 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:21:08,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:21:08,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-26 21:21:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:08,258 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:21:08,258 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:21:08,259 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 [2018-09-26 21:21:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:21:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-26 21:21:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:21:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:21:08,268 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-26 21:21:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:08,268 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:21:08,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:21:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:21:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:21:08,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:08,269 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-26 21:21:08,270 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:08,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-26 21:21:08,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:08,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:08,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:08,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:09,368 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 [2018-09-26 21:21:09,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:09,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:09,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:09,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:09,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:09,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-26 21:21:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:21:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:21:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1575, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:21:09,816 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-26 21:21:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:10,307 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-26 21:21:10,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:21:10,308 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-26 21:21:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:10,309 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:21:10,309 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:21:10,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:21:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:21:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:21:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:21:10,318 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-26 21:21:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:10,318 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:21:10,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:21:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:21:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:21:10,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:10,319 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-26 21:21:10,319 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:10,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-26 21:21:10,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:10,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:10,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:10,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:10,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:10,773 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 [2018-09-26 21:21:10,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:10,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:21:10,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:10,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:11,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:11,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-26 21:21:11,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:21:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:21:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:21:11,286 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-26 21:21:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:11,718 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-26 21:21:11,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:21:11,718 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-26 21:21:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:11,719 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:21:11,719 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:21:11,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:21:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:21:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:21:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:21:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:21:11,727 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-26 21:21:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:11,727 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:21:11,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:21:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:21:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:21:11,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:11,729 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-26 21:21:11,729 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:11,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-26 21:21:11,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:11,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:11,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:11,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:12,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:12,051 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 [2018-09-26 21:21:12,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:12,106 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:12,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:12,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:12,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:12,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-26 21:21:12,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:21:12,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:21:12,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:21:12,177 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-26 21:21:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:12,497 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-26 21:21:12,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:21:12,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-26 21:21:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:12,499 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:21:12,499 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:21:12,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:21:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:21:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-26 21:21:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:21:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:21:12,508 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-26 21:21:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:12,509 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:21:12,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:21:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:21:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:21:12,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:12,509 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-26 21:21:12,510 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:12,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-26 21:21:12,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:12,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:12,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:12,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:13,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:13,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:13,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:13,569 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:21:13,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:13,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:14,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:14,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-26 21:21:14,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:21:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:21:14,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:14,154 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-26 21:21:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:14,844 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-26 21:21:14,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:21:14,847 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-26 21:21:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:14,847 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:21:14,848 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:21:14,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:21:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:21:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:21:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:21:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:21:14,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-26 21:21:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:14,858 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:21:14,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:21:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:21:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:21:14,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:14,859 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-26 21:21:14,859 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:14,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-26 21:21:14,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:14,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:14,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:15,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:15,432 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 [2018-09-26 21:21:15,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:15,532 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-26 21:21:15,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:15,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:16,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:16,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-26 21:21:16,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:21:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:21:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:21:16,140 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-26 21:21:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:16,640 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-26 21:21:16,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:21:16,640 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-26 21:21:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:16,640 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:21:16,641 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:21:16,642 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 [2018-09-26 21:21:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:21:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:21:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:21:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:21:16,649 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-26 21:21:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:16,649 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:21:16,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:21:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:21:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:21:16,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:16,650 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-26 21:21:16,651 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:16,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-26 21:21:16,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:16,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:16,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:16,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:16,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:16,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:16,972 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 [2018-09-26 21:21:16,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:17,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:17,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:17,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-26 21:21:17,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:21:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:21:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:21:17,102 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-26 21:21:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:17,456 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-26 21:21:17,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:21:17,456 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-26 21:21:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:17,457 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:21:17,458 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:21:17,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:21:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:21:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-26 21:21:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:21:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:21:17,467 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-26 21:21:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:17,467 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:21:17,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:21:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:21:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:21:17,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:17,468 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-26 21:21:17,468 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:17,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-26 21:21:17,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:17,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:17,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:17,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:18,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:18,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:18,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:18,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:18,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:19,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:19,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-26 21:21:19,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:21:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:21:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:21:19,503 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-26 21:21:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:20,037 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-26 21:21:20,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:21:20,038 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-26 21:21:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:20,038 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:21:20,038 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:21:20,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:21:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:21:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:21:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:21:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:21:20,048 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-26 21:21:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:20,048 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:21:20,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:21:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:21:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:21:20,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:20,049 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-26 21:21:20,049 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:20,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:20,050 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-26 21:21:20,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:20,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:20,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:20,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:20,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:20,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:20,651 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 [2018-09-26 21:21:20,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:20,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-26 21:21:20,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:20,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:21,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:21,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-26 21:21:21,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:21:21,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:21:21,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:21,472 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-26 21:21:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:21,984 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-26 21:21:21,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:21:21,984 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-26 21:21:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:21,985 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:21:21,985 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:21:21,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:21:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:21:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:21:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:21:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:21:21,995 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-26 21:21:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:21,995 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:21:21,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:21:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:21:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:21:21,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:21,996 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-26 21:21:21,996 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:21,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-26 21:21:21,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:21,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:21,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:21,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:23,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:23,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:23,097 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:23,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:23,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:23,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-26 21:21:23,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:21:23,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:21:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:21:23,147 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-26 21:21:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:23,745 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:21:23,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:21:23,746 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-26 21:21:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:23,747 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:21:23,747 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:21:23,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:21:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:21:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-26 21:21:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:21:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:21:23,759 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-26 21:21:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:23,760 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:21:23,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:21:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:21:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:21:23,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:23,761 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-26 21:21:23,761 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:23,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-26 21:21:23,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:23,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:23,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:23,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:23,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:24,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:24,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:24,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:24,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:21:24,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:24,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:25,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-26 21:21:25,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:21:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:21:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:25,534 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-26 21:21:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:26,066 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-26 21:21:26,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:21:26,067 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-26 21:21:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:26,067 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:21:26,067 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:21:26,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:21:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:21:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:21:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:21:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:21:26,077 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-26 21:21:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:26,077 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:21:26,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:21:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:21:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:21:26,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:26,078 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-26 21:21:26,078 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:26,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:26,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-26 21:21:26,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:26,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:26,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:26,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:26,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:26,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:26,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:26,863 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:21:26,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:26,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:27,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-26 21:21:27,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:21:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:21:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:21:27,707 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-26 21:21:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:28,587 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-26 21:21:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:21:28,587 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-26 21:21:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:28,588 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:21:28,588 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:21:28,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1956, Invalid=5526, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:21:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:21:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:21:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:21:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:21:28,600 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-26 21:21:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:28,600 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:21:28,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:21:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:21:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:21:28,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:28,601 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-26 21:21:28,602 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:28,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-26 21:21:28,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:28,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:28,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:28,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:29,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:29,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:29,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:29,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:29,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:29,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-26 21:21:29,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:21:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:21:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:21:29,202 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-26 21:21:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:29,635 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-26 21:21:29,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:21:29,636 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-26 21:21:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:29,637 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:21:29,638 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:21:29,638 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 [2018-09-26 21:21:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:21:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-26 21:21:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:21:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:21:29,650 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-26 21:21:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:29,651 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:21:29,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:21:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:21:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:21:29,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:29,651 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-26 21:21:29,652 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:29,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-26 21:21:29,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:29,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:29,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:29,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:29,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:30,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:30,641 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 [2018-09-26 21:21:30,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:30,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:30,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:30,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:31,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:31,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-26 21:21:31,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:21:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:21:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=3703, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:21:31,598 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-26 21:21:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:32,256 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-26 21:21:32,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:21:32,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-26 21:21:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:32,257 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:21:32,257 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:21:32,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:21:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:21:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:21:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:21:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:21:32,270 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-26 21:21:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:32,270 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:21:32,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:21:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:21:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:21:32,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:32,271 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-26 21:21:32,271 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:32,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-26 21:21:32,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:32,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:32,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:32,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:32,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:33,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:33,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:33,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:33,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:21:33,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:33,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:34,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:34,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-26 21:21:34,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:21:34,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:21:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:21:34,633 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-26 21:21:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:35,885 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-26 21:21:35,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:21:35,885 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-26 21:21:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:35,886 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:21:35,886 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:21:35,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:21:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:21:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:21:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:21:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:21:35,896 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-26 21:21:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:35,896 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:21:35,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:21:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:21:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:21:35,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:35,897 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-26 21:21:35,897 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:35,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:35,897 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-26 21:21:35,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:35,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:35,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:35,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:35,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:36,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:36,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:36,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:36,723 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:36,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:36,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:36,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:36,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-26 21:21:36,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:21:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:21:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:21:36,789 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-26 21:21:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:37,273 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-26 21:21:37,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:21:37,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-26 21:21:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:37,276 INFO L225 Difference]: With dead ends: 108 [2018-09-26 21:21:37,276 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:21:37,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:21:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:21:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-26 21:21:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:21:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:21:37,287 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-26 21:21:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:37,287 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:21:37,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:21:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:21:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:21:37,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:37,287 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-26 21:21:37,288 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:37,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-26 21:21:37,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:37,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:37,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:37,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:38,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:38,381 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 [2018-09-26 21:21:38,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:38,493 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-26 21:21:38,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:38,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:39,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:39,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-26 21:21:39,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:21:39,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:21:39,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:21:39,932 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-26 21:21:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:40,644 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-26 21:21:40,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:21:40,644 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-26 21:21:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:40,644 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:21:40,645 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:21:40,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:21:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:21:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:21:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:21:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:21:40,656 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-26 21:21:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:40,656 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:21:40,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:21:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:21:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:21:40,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:40,657 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-26 21:21:40,657 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:40,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-26 21:21:40,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:40,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:40,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:40,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:40,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:43,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:43,032 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 [2018-09-26 21:21:43,039 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:43,146 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:21:43,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:43,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:44,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:44,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-26 21:21:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:21:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:21:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:21:44,505 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-26 21:21:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:45,667 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-26 21:21:45,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:21:45,668 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-26 21:21:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:45,669 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:21:45,669 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:21:45,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2728, Invalid=7778, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:21:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:21:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:21:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:21:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:21:45,682 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-26 21:21:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:45,682 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:21:45,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:21:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:21:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:21:45,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:45,683 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-26 21:21:45,684 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:45,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-26 21:21:45,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:45,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:45,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:45,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:45,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:46,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:46,579 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 [2018-09-26 21:21:46,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:46,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:46,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:46,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-26 21:21:46,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:21:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:21:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:21:46,799 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-26 21:21:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:47,375 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:21:47,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:21:47,376 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-26 21:21:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:47,377 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:21:47,377 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:21:47,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:21:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:21:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-26 21:21:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:21:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:21:47,392 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-26 21:21:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:47,393 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:21:47,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:21:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:21:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:21:47,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:47,394 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-26 21:21:47,394 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:47,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:47,394 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-26 21:21:47,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:47,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:47,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:47,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:47,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:49,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:49,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:49,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:49,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:49,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:49,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:50,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:50,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-26 21:21:50,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:21:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:21:50,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1539, Invalid=5103, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:21:50,619 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-26 21:21:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:51,761 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-26 21:21:51,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:21:51,761 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-26 21:21:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:51,762 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:21:51,762 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:21:51,762 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 [2018-09-26 21:21:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:21:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:21:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:21:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:21:51,774 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-26 21:21:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:51,775 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:21:51,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:21:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:21:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:21:51,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:51,775 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-26 21:21:51,775 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:51,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-26 21:21:51,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:51,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:51,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:51,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:51,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:53,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:53,076 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 [2018-09-26 21:21:53,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:53,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:21:53,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:53,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:54,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:54,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-26 21:21:54,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:21:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:21:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:21:54,690 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-26 21:21:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:55,579 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-26 21:21:55,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:21:55,579 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-26 21:21:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:55,580 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:21:55,580 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:21:55,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-09-26 21:21:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:21:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:21:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:21:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:21:55,592 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-26 21:21:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:55,592 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:21:55,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:21:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:21:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:21:55,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:55,593 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-26 21:21:55,593 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:55,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-26 21:21:55,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:55,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:55,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:55,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:55,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:56,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:56,129 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 [2018-09-26 21:21:56,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:56,231 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:56,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:56,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:56,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:56,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-26 21:21:56,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:21:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:21:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:21:56,701 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-26 21:21:57,900 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-09-26 21:21:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:58,502 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-26 21:21:58,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:21:58,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-26 21:21:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:58,504 INFO L225 Difference]: With dead ends: 124 [2018-09-26 21:21:58,504 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:21:58,505 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 [2018-09-26 21:21:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:21:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-26 21:21:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:21:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-26 21:21:58,519 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-26 21:21:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:58,520 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-26 21:21:58,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:21:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-26 21:21:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:21:58,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:58,521 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-26 21:21:58,521 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:58,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-26 21:21:58,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:58,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:59,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:59,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:59,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:00,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:22:00,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:00,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:01,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:01,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-26 21:22:01,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:22:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:22:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:22:01,473 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-26 21:22:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:02,442 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-26 21:22:02,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:22:02,442 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-26 21:22:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:02,443 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:22:02,443 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:22:02,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-09-26 21:22:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:22:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:22:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:22:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-26 21:22:02,457 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-26 21:22:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:02,457 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-26 21:22:02,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:22:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-26 21:22:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:22:02,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:02,458 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-26 21:22:02,458 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:02,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-26 21:22:02,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:02,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:02,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:02,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:02,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:03,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:03,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:03,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:03,824 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-26 21:22:03,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:03,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:05,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:05,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-26 21:22:05,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:22:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:22:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:22:05,628 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-26 21:22:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:06,570 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-26 21:22:06,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:22:06,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-26 21:22:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:06,571 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:22:06,571 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:22:06,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3628, Invalid=10414, Unknown=0, NotChecked=0, Total=14042 [2018-09-26 21:22:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:22:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:22:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:22:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-26 21:22:06,590 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-26 21:22:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:06,590 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-26 21:22:06,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:22:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-26 21:22:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:22:06,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:06,591 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-26 21:22:06,591 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:06,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-26 21:22:06,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:06,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:06,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:06,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:07,529 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 [2018-09-26 21:22:07,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:07,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:07,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-26 21:22:07,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:22:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:22:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:22:07,916 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-26 21:22:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:08,573 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-26 21:22:08,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:22:08,573 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-26 21:22:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:08,575 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:22:08,575 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:22:08,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:22:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:22:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-26 21:22:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:22:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-26 21:22:08,595 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-26 21:22:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:08,595 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-26 21:22:08,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:22:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-26 21:22:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:22:08,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:08,596 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-26 21:22:08,596 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:08,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-26 21:22:08,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:08,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:08,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:08,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:08,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:10,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:10,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:10,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:10,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:10,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:10,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:22:11,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:11,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-26 21:22:11,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:22:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:22:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2015, Invalid=6727, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:22:11,963 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-26 21:22:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:13,027 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-26 21:22:13,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:22:13,027 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-26 21:22:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:13,028 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:22:13,028 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:22:13,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:22:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:22:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:22:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:22:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-26 21:22:13,043 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-26 21:22:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:13,043 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-26 21:22:13,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:22:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-26 21:22:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:22:13,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:13,044 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-26 21:22:13,044 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:13,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-26 21:22:13,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:13,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:13,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:13,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:13,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:14,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:14,442 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 [2018-09-26 21:22:14,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:14,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-26 21:22:14,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:14,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:16,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:16,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-26 21:22:16,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:22:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:22:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:22:16,233 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-26 21:22:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:17,458 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-26 21:22:17,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:22:17,458 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-26 21:22:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:17,459 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:22:17,459 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:22:17,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-09-26 21:22:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:22:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:22:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:22:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-26 21:22:17,477 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-26 21:22:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:17,478 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-26 21:22:17,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:22:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-26 21:22:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:22:17,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:17,479 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-26 21:22:17,479 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:17,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-26 21:22:17,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:17,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:17,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:17,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:17,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:18,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:18,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:18,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:18,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:18,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:18,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:19,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:19,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-26 21:22:19,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:22:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:22:19,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:22:19,003 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-26 21:22:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:19,926 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:22:19,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:22:19,926 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-26 21:22:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:19,928 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:22:19,928 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:22:19,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:22:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:22:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-26 21:22:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:22:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-26 21:22:19,945 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-26 21:22:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:19,945 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-26 21:22:19,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:22:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-26 21:22:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:22:19,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:19,946 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-26 21:22:19,946 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:19,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-26 21:22:19,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:19,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:19,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:21,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:21,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:21,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:21,610 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:22:21,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:21,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:24,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:24,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-26 21:22:24,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:22:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:22:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:22:24,220 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-26 21:22:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:25,661 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-26 21:22:25,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:22:25,662 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-26 21:22:25,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:25,662 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:22:25,662 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:22:25,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-09-26 21:22:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:22:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:22:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:22:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-26 21:22:25,679 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-26 21:22:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:25,679 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-26 21:22:25,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:22:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-26 21:22:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:22:25,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:25,680 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-26 21:22:25,680 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:25,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-26 21:22:25,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:25,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:25,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:27,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:27,488 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 [2018-09-26 21:22:27,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:27,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:22:27,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:27,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:29,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:29,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-26 21:22:29,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:22:29,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:22:29,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:22:29,441 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-26 21:22:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:30,939 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-26 21:22:30,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:22:30,939 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-26 21:22:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:30,940 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:22:30,940 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:22:30,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4656, Invalid=13434, Unknown=0, NotChecked=0, Total=18090 [2018-09-26 21:22:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:22:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:22:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:22:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-26 21:22:30,982 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-26 21:22:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:30,982 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-26 21:22:30,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:22:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-26 21:22:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:22:30,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:30,983 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-26 21:22:30,983 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:30,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-26 21:22:30,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:30,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:30,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:31,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:31,893 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 [2018-09-26 21:22:31,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:32,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:32,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:32,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-26 21:22:32,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:22:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:22:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:22:32,172 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-26 21:22:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:32,936 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-26 21:22:32,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:22:32,937 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-26 21:22:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:32,938 INFO L225 Difference]: With dead ends: 148 [2018-09-26 21:22:32,938 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:22:32,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:22:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:22:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-26 21:22:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:22:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-26 21:22:32,957 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-26 21:22:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:32,958 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-26 21:22:32,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:22:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-26 21:22:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:22:32,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:32,959 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-26 21:22:32,959 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:32,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-26 21:22:32,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:32,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:32,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:32,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:32,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:34,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:34,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:34,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:34,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:34,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:34,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:22:36,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:36,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-26 21:22:36,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:22:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:22:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=8575, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:22:36,955 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-26 21:22:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:38,256 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-26 21:22:38,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:22:38,257 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-26 21:22:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:38,257 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:22:38,258 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:22:38,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:22:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:22:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:22:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:22:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-26 21:22:38,276 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-26 21:22:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:38,276 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-26 21:22:38,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:22:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-26 21:22:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:22:38,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:38,277 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-26 21:22:38,277 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:38,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-26 21:22:38,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:38,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:38,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:38,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:38,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:39,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:39,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:40,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:40,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:22:40,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:40,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:42,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:42,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-26 21:22:42,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:22:42,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:22:42,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:22:42,237 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-26 21:22:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:43,642 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-26 21:22:43,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:22:43,642 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-26 21:22:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:43,643 INFO L225 Difference]: With dead ends: 223 [2018-09-26 21:22:43,643 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:22:43,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-09-26 21:22:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:22:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:22:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:22:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-26 21:22:43,660 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-26 21:22:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:43,660 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-26 21:22:43,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:22:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-26 21:22:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:22:43,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:43,661 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-26 21:22:43,661 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:43,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-26 21:22:43,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:43,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:43,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:43,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:43,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:44,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:44,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:44,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:44,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:44,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:44,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:44,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:44,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-26 21:22:44,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:22:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:22:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:22:44,629 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-26 21:22:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:45,646 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-26 21:22:45,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:22:45,647 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-26 21:22:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:45,648 INFO L225 Difference]: With dead ends: 156 [2018-09-26 21:22:45,649 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:22:45,649 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 [2018-09-26 21:22:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:22:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-26 21:22:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:22:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-26 21:22:45,669 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-26 21:22:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:45,669 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-26 21:22:45,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:22:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-26 21:22:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:22:45,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:45,670 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-26 21:22:45,671 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:45,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:45,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-26 21:22:45,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:45,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:45,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:45,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:45,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:47,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:47,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:22:47,467 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:47,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-26 21:22:47,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:47,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:49,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:49,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-26 21:22:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:22:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:22:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:22:49,837 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-26 21:22:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:51,465 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-26 21:22:51,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:22:51,466 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-26 21:22:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:51,466 INFO L225 Difference]: With dead ends: 233 [2018-09-26 21:22:51,466 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:22:51,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-09-26 21:22:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:22:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:22:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:22:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-26 21:22:51,491 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-26 21:22:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:51,492 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-26 21:22:51,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:22:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-26 21:22:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:22:51,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:51,493 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-26 21:22:51,493 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:51,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:51,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-26 21:22:51,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:51,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:51,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:51,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:51,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:53,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:53,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:53,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:53,487 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-26 21:22:53,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:53,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:55,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:55,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-26 21:22:55,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 21:22:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 21:22:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:22:55,884 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-09-26 21:22:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:57,231 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-09-26 21:22:57,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:22:57,231 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-09-26 21:22:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:57,232 INFO L225 Difference]: With dead ends: 235 [2018-09-26 21:22:57,232 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:22:57,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5812, Invalid=16838, Unknown=0, NotChecked=0, Total=22650 [2018-09-26 21:22:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:22:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:22:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:22:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-26 21:22:57,251 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-26 21:22:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:57,251 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-26 21:22:57,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-26 21:22:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-26 21:22:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:22:57,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:57,252 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-26 21:22:57,252 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:57,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-09-26 21:22:57,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:57,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:57,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:57,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:57,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:58,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:58,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:58,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:58,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:58,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:58,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-26 21:22:58,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:22:58,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:22:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:22:58,316 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-26 21:22:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:59,200 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-26 21:22:59,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:22:59,200 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-26 21:22:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:59,202 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:22:59,202 INFO L226 Difference]: Without dead ends: 162 [2018-09-26 21:22:59,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:22:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-26 21:22:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-09-26 21:22:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:22:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-26 21:22:59,222 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-09-26 21:22:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:59,222 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-26 21:22:59,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:22:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-26 21:22:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:22:59,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:59,223 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-26 21:22:59,223 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:59,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-09-26 21:22:59,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:59,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:59,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:59,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:59,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:01,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:01,383 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 [2018-09-26 21:23:01,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:01,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:01,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:01,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:23:03,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:03,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-09-26 21:23:03,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-26 21:23:03,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-26 21:23:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3159, Invalid=10647, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:23:03,849 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-09-26 21:23:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:05,481 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-09-26 21:23:05,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:23:05,481 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-09-26 21:23:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:05,482 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:23:05,482 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:23:05,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-26 21:23:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:23:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:23:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:23:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-26 21:23:05,502 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-26 21:23:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:05,502 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-26 21:23:05,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-26 21:23:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-26 21:23:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:23:05,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:05,503 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-26 21:23:05,503 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:05,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-09-26 21:23:05,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:05,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:05,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:07,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:07,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:07,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:07,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:23:07,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:07,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:10,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:10,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-09-26 21:23:10,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-26 21:23:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-26 21:23:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:23:10,294 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-09-26 21:23:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:12,152 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-09-26 21:23:12,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:23:12,152 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-09-26 21:23:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:12,153 INFO L225 Difference]: With dead ends: 247 [2018-09-26 21:23:12,153 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:23:12,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-09-26 21:23:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:23:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:23:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:23:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-26 21:23:12,173 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-26 21:23:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:12,173 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-26 21:23:12,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-26 21:23:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-26 21:23:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:23:12,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:12,174 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-26 21:23:12,174 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:12,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-09-26 21:23:12,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:12,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:12,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:12,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:12,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:13,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:13,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:13,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:13,271 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:13,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:13,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:13,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:13,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-26 21:23:13,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:23:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:23:13,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:23:13,368 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-26 21:23:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:14,348 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-09-26 21:23:14,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:23:14,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-26 21:23:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:14,350 INFO L225 Difference]: With dead ends: 172 [2018-09-26 21:23:14,350 INFO L226 Difference]: Without dead ends: 170 [2018-09-26 21:23:14,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:23:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-26 21:23:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-09-26 21:23:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:23:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-26 21:23:14,373 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-09-26 21:23:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:14,373 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-26 21:23:14,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:23:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-26 21:23:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:23:14,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:14,374 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-26 21:23:14,374 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:14,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-09-26 21:23:14,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:14,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:14,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:14,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:14,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:16,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:16,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:16,766 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:16,964 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:23:16,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:16,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:19,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:19,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-26 21:23:19,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-26 21:23:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-26 21:23:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-26 21:23:19,559 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-09-26 21:23:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:21,527 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-09-26 21:23:21,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:23:21,528 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-09-26 21:23:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:21,529 INFO L225 Difference]: With dead ends: 257 [2018-09-26 21:23:21,529 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:23:21,530 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 [2018-09-26 21:23:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:23:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:23:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:23:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-26 21:23:21,555 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-26 21:23:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:21,555 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-26 21:23:21,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-26 21:23:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-26 21:23:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:23:21,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:21,556 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-26 21:23:21,556 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:21,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-09-26 21:23:21,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:21,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:21,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:21,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:21,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:24,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:24,193 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 [2018-09-26 21:23:24,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:24,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-09-26 21:23:24,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:24,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:27,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:27,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-09-26 21:23:27,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-26 21:23:27,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-26 21:23:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-09-26 21:23:27,455 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-09-26 21:23:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:29,260 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-09-26 21:23:29,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:23:29,260 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-09-26 21:23:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:29,261 INFO L225 Difference]: With dead ends: 259 [2018-09-26 21:23:29,262 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:23:29,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7096, Invalid=20626, Unknown=0, NotChecked=0, Total=27722 [2018-09-26 21:23:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:23:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:23:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:23:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-26 21:23:29,286 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-26 21:23:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:29,286 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-26 21:23:29,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-26 21:23:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-26 21:23:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:23:29,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:29,288 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-26 21:23:29,288 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:29,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-09-26 21:23:29,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:29,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:29,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:29,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:29,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:30,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:30,612 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 [2018-09-26 21:23:30,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:30,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:30,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:30,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-26 21:23:30,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:23:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:23:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:23:30,856 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-26 21:23:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:32,099 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-26 21:23:32,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:23:32,099 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-26 21:23:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:32,100 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:23:32,100 INFO L226 Difference]: Without dead ends: 178 [2018-09-26 21:23:32,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:23:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-26 21:23:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-09-26 21:23:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:23:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-26 21:23:32,131 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-09-26 21:23:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:32,131 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-26 21:23:32,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:23:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-26 21:23:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:23:32,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:32,132 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-26 21:23:32,132 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:32,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-09-26 21:23:32,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:32,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:32,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:32,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:32,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:34,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:34,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:34,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:34,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:34,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:34,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:23:37,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:37,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-09-26 21:23:37,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-26 21:23:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-26 21:23:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3827, Invalid=12943, Unknown=0, NotChecked=0, Total=16770 [2018-09-26 21:23:37,815 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-09-26 21:23:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:39,738 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-09-26 21:23:39,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:23:39,738 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-09-26 21:23:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:39,739 INFO L225 Difference]: With dead ends: 269 [2018-09-26 21:23:39,739 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:23:39,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6153 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-09-26 21:23:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:23:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:23:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:23:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-26 21:23:39,765 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-26 21:23:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:39,765 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-26 21:23:39,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-26 21:23:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-26 21:23:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:23:39,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:39,767 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-26 21:23:39,767 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:39,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-09-26 21:23:39,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:39,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:39,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:39,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:39,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:42,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:42,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:42,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:42,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-26 21:23:42,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:42,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:45,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:45,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-09-26 21:23:45,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-26 21:23:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-26 21:23:45,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:23:45,644 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-09-26 21:23:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:47,556 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-09-26 21:23:47,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:23:47,556 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-09-26 21:23:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:47,557 INFO L225 Difference]: With dead ends: 271 [2018-09-26 21:23:47,557 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:23:47,558 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 [2018-09-26 21:23:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:23:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:23:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:23:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-26 21:23:47,580 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-26 21:23:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:47,580 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-26 21:23:47,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-26 21:23:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-26 21:23:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:23:47,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:47,581 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-26 21:23:47,581 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:47,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-09-26 21:23:47,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:47,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:47,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:47,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:47,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:48,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:48,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:48,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:48,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:48,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:48,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:48,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:48,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-26 21:23:48,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:23:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:23:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:23:48,760 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-26 21:23:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:49,869 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-26 21:23:49,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:23:49,870 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-26 21:23:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:49,871 INFO L225 Difference]: With dead ends: 188 [2018-09-26 21:23:49,871 INFO L226 Difference]: Without dead ends: 186 [2018-09-26 21:23:49,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:23:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-26 21:23:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-09-26 21:23:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:23:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-26 21:23:49,899 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-09-26 21:23:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:49,900 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-26 21:23:49,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:23:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-26 21:23:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:23:49,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:49,900 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-26 21:23:49,901 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:49,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-09-26 21:23:49,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:49,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:49,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:49,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:49,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:52,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:52,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:23:52,870 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:53,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:23:53,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:53,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:56,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:56,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-09-26 21:23:56,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-26 21:23:56,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-26 21:23:56,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4276, Invalid=14356, Unknown=0, NotChecked=0, Total=18632 [2018-09-26 21:23:56,250 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-09-26 21:23:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:58,299 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-09-26 21:23:58,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:23:58,299 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-09-26 21:23:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:58,300 INFO L225 Difference]: With dead ends: 281 [2018-09-26 21:23:58,300 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:23:58,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-09-26 21:23:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:23:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:23:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:23:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-26 21:23:58,334 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-26 21:23:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:58,335 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-26 21:23:58,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-26 21:23:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-26 21:23:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:23:58,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:58,336 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-26 21:23:58,336 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:58,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:58,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-09-26 21:23:58,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:58,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:58,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:58,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:58,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:00,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:00,978 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 [2018-09-26 21:24:00,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:24:01,226 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-26 21:24:01,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:01,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:04,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:04,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-09-26 21:24:04,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-26 21:24:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-26 21:24:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4323, Invalid=14583, Unknown=0, NotChecked=0, Total=18906 [2018-09-26 21:24:04,603 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-09-26 21:24:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:06,725 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-09-26 21:24:06,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:24:06,725 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-09-26 21:24:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:06,726 INFO L225 Difference]: With dead ends: 283 [2018-09-26 21:24:06,726 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:24:06,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8508, Invalid=24798, Unknown=0, NotChecked=0, Total=33306 [2018-09-26 21:24:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:24:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:24:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:24:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-26 21:24:06,762 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-26 21:24:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:06,763 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-26 21:24:06,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-26 21:24:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-26 21:24:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:24:06,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:06,764 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-26 21:24:06,764 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:06,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-09-26 21:24:06,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:06,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:06,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:06,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:06,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:08,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:08,108 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 [2018-09-26 21:24:08,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:08,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:08,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:08,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-26 21:24:08,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:24:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:24:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:24:08,414 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-26 21:24:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:09,621 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-09-26 21:24:09,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:24:09,621 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-26 21:24:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:09,623 INFO L225 Difference]: With dead ends: 196 [2018-09-26 21:24:09,623 INFO L226 Difference]: Without dead ends: 194 [2018-09-26 21:24:09,624 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 [2018-09-26 21:24:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-26 21:24:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-09-26 21:24:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:24:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-26 21:24:09,654 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-09-26 21:24:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:09,654 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-26 21:24:09,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:24:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-26 21:24:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:24:09,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:09,656 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-26 21:24:09,656 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:09,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-09-26 21:24:09,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:09,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:09,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:09,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:09,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:12,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:12,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:24:12,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:24:12,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:24:12,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:12,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:24:16,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:16,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-09-26 21:24:16,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-26 21:24:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-26 21:24:16,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4559, Invalid=15463, Unknown=0, NotChecked=0, Total=20022 [2018-09-26 21:24:16,328 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-09-26 21:24:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:18,805 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-09-26 21:24:18,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:24:18,805 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-09-26 21:24:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:18,806 INFO L225 Difference]: With dead ends: 293 [2018-09-26 21:24:18,806 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:24:18,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7383 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=8929, Invalid=26227, Unknown=0, NotChecked=0, Total=35156 [2018-09-26 21:24:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:24:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:24:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:24:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-26 21:24:18,833 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-26 21:24:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:18,833 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-26 21:24:18,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-26 21:24:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-26 21:24:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:24:18,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:18,834 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-26 21:24:18,834 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:18,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-09-26 21:24:18,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:18,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:18,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:18,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:18,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:21,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:21,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:24:21,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:24:21,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 21:24:21,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:21,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:25,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:25,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-09-26 21:24:25,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-26 21:24:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-26 21:24:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4703, Invalid=15889, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:24:25,647 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-09-26 21:24:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:28,072 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-09-26 21:24:28,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:24:28,072 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-09-26 21:24:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:28,073 INFO L225 Difference]: With dead ends: 295 [2018-09-26 21:24:28,073 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:24:28,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9262, Invalid=27028, Unknown=0, NotChecked=0, Total=36290 [2018-09-26 21:24:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:24:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:24:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:24:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-26 21:24:28,101 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-26 21:24:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:28,101 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-26 21:24:28,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-26 21:24:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-26 21:24:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:24:28,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:28,102 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-26 21:24:28,102 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:28,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:28,102 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-09-26 21:24:28,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:28,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:28,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:28,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:28,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:29,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:29,230 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 [2018-09-26 21:24:29,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:24:29,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:24:29,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:29,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:29,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:29,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-26 21:24:29,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:24:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:24:29,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:24:29,504 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-26 21:24:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:30,779 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-09-26 21:24:30,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:24:30,779 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-26 21:24:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:30,780 INFO L225 Difference]: With dead ends: 204 [2018-09-26 21:24:30,780 INFO L226 Difference]: Without dead ends: 202 [2018-09-26 21:24:30,781 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 [2018-09-26 21:24:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-26 21:24:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-09-26 21:24:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:24:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-26 21:24:30,813 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-09-26 21:24:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:30,813 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-26 21:24:30,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:24:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-26 21:24:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:24:30,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:30,815 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-26 21:24:30,815 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:30,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-09-26 21:24:30,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:30,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:30,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:30,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:30,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:34,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:34,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:24:34,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:24:34,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-26 21:24:34,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:34,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:38,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:38,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-09-26 21:24:38,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-26 21:24:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-26 21:24:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5048, Invalid=17004, Unknown=0, NotChecked=0, Total=22052 [2018-09-26 21:24:38,638 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-09-26 21:24:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:41,021 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-09-26 21:24:41,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:24:41,021 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-09-26 21:24:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:41,022 INFO L225 Difference]: With dead ends: 305 [2018-09-26 21:24:41,022 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:24:41,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8136 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9800, Invalid=28812, Unknown=0, NotChecked=0, Total=38612 [2018-09-26 21:24:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:24:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:24:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:24:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-26 21:24:41,056 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-26 21:24:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:41,056 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-26 21:24:41,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-26 21:24:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-26 21:24:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:24:41,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:41,058 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-26 21:24:41,058 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:41,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-09-26 21:24:41,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:41,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:41,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:41,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:41,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:44,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:44,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:24:44,402 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:24:44,666 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-26 21:24:44,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:44,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:24:46,245 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:24:46,446 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:46,446 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:24:46,452 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:24:46,452 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:24:46 BoogieIcfgContainer [2018-09-26 21:24:46,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:24:46,453 INFO L168 Benchmark]: Toolchain (without parser) took 238490.79 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 455.6 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -299.4 MB). Peak memory consumption was 156.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:46,454 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:24:46,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:24:46,454 INFO L168 Benchmark]: Boogie Preprocessor took 23.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:24:46,455 INFO L168 Benchmark]: RCFGBuilder took 351.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:46,455 INFO L168 Benchmark]: TraceAbstraction took 238072.18 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 455.6 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -320.6 MB). Peak memory consumption was 135.0 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:46,457 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 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 351.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238072.18 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 455.6 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -320.6 MB). Peak memory consumption was 135.0 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 203 with TraceHistMax 50, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 126 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 238.0s OverallTime, 74 OverallIterations, 50 TraceHistogramMax, 66.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2093 SDtfs, 1795 SDslu, 26489 SDs, 0 SdLazy, 27395 SolverSat, 3987 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13008 GetRequests, 6886 SyntacticMatches, 0 SemanticMatches, 6122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152951 ImplicationChecksByTransitivity, 185.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=73, 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: 1.0s AutomataMinimizationTime, 73 MinimizatonAttempts, 24 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 151.8s InterpolantComputationTime, 15058 NumberOfCodeBlocks, 15058 NumberOfCodeBlocksAsserted, 1067 NumberOfCheckSat, 14914 ConstructedInterpolants, 0 QuantifiedInterpolants, 7837611 SizeOfPredicates, 213 NumberOfNonLiveVariables, 40803 ConjunctsInSsa, 3890 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 121274/237670 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-0-2018-09-26_21-24-46-469.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-0-2018-09-26_21-24-46-469.csv Completed graceful shutdown