java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:48:51,655 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:48:51,657 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:48:51,668 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:48:51,669 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:48:51,670 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:48:51,671 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:48:51,673 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:48:51,674 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:48:51,675 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:48:51,676 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:48:51,702 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:48:51,718 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:48:51,718 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:48:51,719 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:48:51,719 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:48:51,720 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:48:51,720 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:48:51,720 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:48:51,721 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:48:51,721 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:48:51,721 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:48:51,721 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:48:51,721 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:48:51,722 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:48:51,722 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:48:51,722 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:48:51,722 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:48:51,722 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:48:51,723 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:48:51,723 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:48:51,723 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:48:51,723 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:48:51,723 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:48:51,723 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:48:51,724 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:48:51,724 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:48:51,724 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:48:51,724 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:48:51,724 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:48:51,725 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:48:51,725 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:48:51,725 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:48:51,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:48:51,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:48:51,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:48:51,787 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:48:51,788 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:48:51,789 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-26 21:48:51,789 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-26 21:48:51,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:48:51,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:48:51,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:48:51,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:48:51,851 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:48:51,873 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,887 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:48:51,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:48:51,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:48:51,896 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:48:51,908 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,908 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,909 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,909 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,913 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,915 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,916 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 09:48:51" (1/1) ... [2018-09-26 21:48:51,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:48:51,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:48:51,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:48:51,919 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:48:51,920 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 09:48:51" (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 21:48:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:48:52,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:48:52,318 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:48:52,319 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:48:52 BoogieIcfgContainer [2018-09-26 21:48:52,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:48:52,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:48:52,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:48:52,324 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:48:52,325 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 09:48:51" (1/2) ... [2018-09-26 21:48:52,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49309a3e and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:48:52, skipping insertion in model container [2018-09-26 21:48:52,327 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 09:48:52" (2/2) ... [2018-09-26 21:48:52,330 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-26 21:48:52,341 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:48:52,355 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:48:52,415 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:48:52,416 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:48:52,416 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:48:52,416 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:48:52,416 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:48:52,417 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:48:52,417 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:48:52,417 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:48:52,420 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:48:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:48:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:48:52,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:52,459 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:48:52,460 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:52,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-26 21:48:52,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:52,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:52,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:52,727 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 21:48:52,730 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:48:52,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:48:52,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:48:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:48:52,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:52,766 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-26 21:48:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:53,022 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-26 21:48:53,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:48:53,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:48:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:53,038 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:48:53,038 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:48:53,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:48:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-26 21:48:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:48:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:48:53,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-26 21:48:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:53,078 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:48:53,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:48:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:48:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:48:53,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:53,080 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:48:53,080 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:53,080 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-26 21:48:53,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:53,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:53,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:53,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:53,278 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 21:48:53,281 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:48:53,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:48:53,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:48:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:48:53,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:53,288 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-26 21:48:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:53,493 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-26 21:48:53,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:48:53,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:48:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:53,495 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:48:53,495 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:48:53,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:48:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:48:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:48:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:48:53,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:48:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:53,504 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:48:53,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:48:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:48:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:48:53,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:53,505 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:48:53,506 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:53,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-26 21:48:53,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:53,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:53,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:53,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:53,847 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 21:48:53,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:53,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:53,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:53,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:54,103 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 21:48:54,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:54,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-26 21:48:54,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:48:54,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:48:54,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:54,130 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-26 21:48:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:55,932 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-26 21:48:55,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:48:55,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-26 21:48:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:55,936 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:48:55,936 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:48:55,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:48:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:48:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:48:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:48:55,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-26 21:48:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:55,946 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:48:55,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:48:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:48:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:48:55,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:55,948 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-26 21:48:55,949 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:55,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-26 21:48:55,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:55,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:55,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:55,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:55,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:56,125 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 21:48:56,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:56,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:56,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:56,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:56,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:56,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:56,431 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 21:48:56,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:56,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-26 21:48:56,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:48:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:48:56,457 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:56,457 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-26 21:48:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:57,322 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-26 21:48:57,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:48:57,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-26 21:48:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:57,325 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:48:57,325 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:48:57,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:48:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:48:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:48:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:48:57,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-26 21:48:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:57,332 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:48:57,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:48:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:48:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:48:57,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:57,333 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-26 21:48:57,333 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:57,334 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-26 21:48:57,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:57,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:57,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:57,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:57,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:57,455 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 21:48:57,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:57,456 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 21:48:57,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:57,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:48:57,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:57,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:57,624 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 21:48:57,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:57,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-26 21:48:57,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:48:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:48:57,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:57,647 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-26 21:48:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:58,039 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-26 21:48:58,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:48:58,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-26 21:48:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:58,040 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:48:58,041 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:48:58,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:48:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:48:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:48:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:48:58,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-26 21:48:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:58,049 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:48:58,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:48:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:48:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:48:58,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:58,050 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-26 21:48:58,051 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:58,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-26 21:48:58,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:58,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:58,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:58,275 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 21:48:58,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:58,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:58,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:58,318 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:58,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:58,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:58,412 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 21:48:58,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:58,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-26 21:48:58,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:48:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:48:58,440 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:58,440 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-26 21:48:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:58,746 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-26 21:48:58,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:48:58,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-26 21:48:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:58,748 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:48:58,748 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:48:58,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:48:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-26 21:48:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:48:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:48:58,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-26 21:48:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:58,758 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:48:58,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:48:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:48:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:48:58,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:58,759 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-26 21:48:58,760 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:58,760 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-26 21:48:58,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:58,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:58,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:58,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:58,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:58,920 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 21:48:58,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:58,920 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 21:48:58,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:58,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:48:58,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:58,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:59,280 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 21:48:59,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:59,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-26 21:48:59,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:48:59,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:48:59,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:59,303 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-26 21:48:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:59,639 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-26 21:48:59,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:48:59,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-26 21:48:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:59,645 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:48:59,645 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:48:59,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:48:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:48:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:48:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:48:59,655 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-26 21:48:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:59,655 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:48:59,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:48:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:48:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:48:59,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:59,657 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-26 21:48:59,657 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:59,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:59,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-26 21:48:59,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:59,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:59,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:59,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:59,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:59,867 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 21:48:59,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:59,868 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 21:48:59,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:59,939 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:48:59,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:59,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:00,135 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 21:49:00,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:00,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-26 21:49:00,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:49:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:49:00,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:00,158 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-26 21:49:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:00,777 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-26 21:49:00,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:49:00,777 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-26 21:49:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:00,778 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:49:00,778 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:49:00,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:49:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:49:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:49:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:49:00,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-26 21:49:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:00,785 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:49:00,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:49:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:49:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:49:00,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:00,786 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-26 21:49:00,786 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:00,787 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:00,787 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-26 21:49:00,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:00,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:00,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:00,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:01,075 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 21:49:01,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:01,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:01,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:01,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:01,609 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 21:49:01,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:01,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-26 21:49:01,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:49:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:49:01,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:01,646 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-26 21:49:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:02,266 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-26 21:49:02,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:49:02,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-26 21:49:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:02,269 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:49:02,269 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:49:02,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:49:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-26 21:49:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:49:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:49:02,277 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-26 21:49:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:02,277 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:49:02,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:49:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:49:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:49:02,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:02,279 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-26 21:49:02,279 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:02,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-26 21:49:02,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:02,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:02,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:02,487 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 21:49:02,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:02,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:02,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:02,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:02,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:02,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:03,016 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 21:49:03,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:03,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-26 21:49:03,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:49:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:49:03,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:03,043 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-26 21:49:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:03,427 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-26 21:49:03,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:49:03,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-26 21:49:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:03,428 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:49:03,428 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:49:03,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:49:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:49:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:49:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:49:03,434 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-26 21:49:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:03,435 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:49:03,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:49:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:49:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:49:03,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:03,436 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-26 21:49:03,436 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:03,436 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-26 21:49:03,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:03,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:03,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:03,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:03,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:03,700 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 21:49:03,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:03,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:03,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:03,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:49:03,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:03,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:04,007 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 21:49:04,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:04,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-26 21:49:04,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:49:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:49:04,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:04,031 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-26 21:49:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:04,767 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-26 21:49:04,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:49:04,767 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-26 21:49:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:04,768 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:49:04,768 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:49:04,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:49:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:49:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:49:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:49:04,775 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-26 21:49:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:04,776 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:49:04,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:49:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:49:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:49:04,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:04,777 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-26 21:49:04,777 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:04,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-26 21:49:04,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:04,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:04,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:04,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:04,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:04,927 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 21:49:04,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:04,928 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 21:49:04,936 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:04,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:04,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:04,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:05,117 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 21:49:05,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:05,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-26 21:49:05,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:49:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:49:05,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:05,140 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-26 21:49:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:05,582 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:49:05,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:49:05,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-26 21:49:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:05,584 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:49:05,584 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:49:05,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:49:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-26 21:49:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:49:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:49:05,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-26 21:49:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:05,593 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:49:05,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:49:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:49:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:49:05,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:05,594 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-26 21:49:05,594 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:05,594 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-26 21:49:05,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:05,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:05,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:05,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:05,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:06,167 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 21:49:06,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:06,168 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 21:49:06,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:06,240 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:49:06,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:06,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:06,596 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 21:49:06,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:06,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-26 21:49:06,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:49:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:49:06,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:06,619 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-26 21:49:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:07,166 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-26 21:49:07,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:49:07,167 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-26 21:49:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:07,167 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:49:07,167 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:49:07,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:49:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:49:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:49:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:49:07,174 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-26 21:49:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:07,174 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:49:07,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:49:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:49:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:49:07,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:07,175 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-26 21:49:07,175 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:07,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:07,176 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-26 21:49:07,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:07,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:07,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:07,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:07,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:08,035 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 21:49:08,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:08,035 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 21:49:08,044 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:08,087 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:49:08,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:08,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:08,442 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 21:49:08,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:08,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-26 21:49:08,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:49:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:49:08,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:08,464 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-26 21:49:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:09,386 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-26 21:49:09,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:49:09,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-26 21:49:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:09,387 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:49:09,387 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:49:09,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:49:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:49:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:49:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:49:09,394 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-26 21:49:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:09,395 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:49:09,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:49:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:49:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:49:09,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:09,396 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-26 21:49:09,396 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:09,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-26 21:49:09,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:09,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:09,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:09,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:09,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:09,673 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 21:49:09,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:09,674 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 21:49:09,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:09,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:09,817 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 21:49:09,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:09,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-26 21:49:09,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:49:09,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:49:09,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:09,840 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-26 21:49:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:10,436 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-26 21:49:10,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:49:10,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:49:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:10,438 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:49:10,438 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:49:10,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:49:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-26 21:49:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:49:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:49:10,446 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-26 21:49:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:10,447 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:49:10,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:49:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:49:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:49:10,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:10,448 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-26 21:49:10,448 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:10,448 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-26 21:49:10,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:10,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:10,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:11,142 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 21:49:11,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:11,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:11,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:11,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:11,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:11,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:11,576 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 21:49:11,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:11,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-26 21:49:11,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:49:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:49:11,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:11,600 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-26 21:49:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:12,541 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-26 21:49:12,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:49:12,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-26 21:49:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:12,542 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:49:12,542 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:49:12,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:49:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:49:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:49:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:49:12,550 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-26 21:49:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:12,550 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:49:12,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:49:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:49:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:49:12,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:12,552 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-26 21:49:12,552 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:12,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-26 21:49:12,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:12,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:12,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:12,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:12,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:12,878 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 21:49:12,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:12,878 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 21:49:12,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:12,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:49:12,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:12,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:13,278 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 21:49:13,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:13,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-26 21:49:13,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:49:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:49:13,300 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:13,300 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-26 21:49:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:14,775 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-26 21:49:14,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:49:14,776 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-26 21:49:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:14,776 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:49:14,776 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:49:14,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:49:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:49:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:49:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:49:14,784 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-26 21:49:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:14,785 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:49:14,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:49:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:49:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:49:14,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:14,786 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-26 21:49:14,786 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:14,786 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-26 21:49:14,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:14,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:14,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:14,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:14,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:15,003 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 21:49:15,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:15,003 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 21:49:15,010 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:15,053 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:15,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:15,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:15,209 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 21:49:15,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:15,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-26 21:49:15,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:49:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:49:15,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:15,232 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-26 21:49:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:15,893 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-26 21:49:15,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:49:15,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-26 21:49:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:15,894 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:49:15,895 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:49:15,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:49:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-26 21:49:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:49:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:49:15,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-26 21:49:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:15,903 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:49:15,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:49:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:49:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:49:15,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:15,904 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-26 21:49:15,905 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:15,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-26 21:49:15,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:15,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:15,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:15,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:15,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:16,736 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 21:49:16,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:16,736 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 21:49:16,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:16,791 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-26 21:49:16,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:16,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:17,407 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 21:49:17,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:17,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-26 21:49:17,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:49:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:49:17,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:17,429 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-26 21:49:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:19,183 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-26 21:49:19,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:49:19,184 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-26 21:49:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:19,184 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:49:19,184 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:49:19,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:49:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:49:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:49:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:49:19,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-26 21:49:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:19,194 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:49:19,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:49:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:49:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:49:19,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:19,195 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-26 21:49:19,196 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:19,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:19,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-26 21:49:19,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:19,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:19,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:19,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:19,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:19,638 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 21:49:19,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:19,638 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 21:49:19,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:19,700 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:49:19,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:19,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:20,485 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 21:49:20,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:20,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-26 21:49:20,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:49:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:49:20,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:20,507 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-26 21:49:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:21,968 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-26 21:49:21,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:49:21,969 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-26 21:49:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:21,969 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:49:21,969 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:49:21,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:49:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:49:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:49:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:49:21,977 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-26 21:49:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:21,977 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:49:21,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:49:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:49:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:49:21,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:21,978 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-26 21:49:21,979 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:21,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-26 21:49:21,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:21,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:21,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:21,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:21,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:22,537 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 21:49:22,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:22,538 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 21:49:22,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:22,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:22,803 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 21:49:22,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:22,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-26 21:49:22,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:49:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:49:22,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:22,826 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-26 21:49:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:23,628 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:49:23,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:49:23,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-26 21:49:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:23,629 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:49:23,629 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:49:23,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:49:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-26 21:49:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:49:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:49:23,639 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-26 21:49:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:23,639 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:49:23,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:49:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:49:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:49:23,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:23,640 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-26 21:49:23,640 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:23,640 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-26 21:49:23,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:23,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:23,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:23,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:23,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:24,738 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 21:49:24,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:24,739 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 21:49:24,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:24,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:24,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:24,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:25,272 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 21:49:25,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:25,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-26 21:49:25,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:49:25,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:49:25,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:25,298 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-26 21:49:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:26,510 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-26 21:49:26,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:49:26,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-26 21:49:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:26,511 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:49:26,512 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:49:26,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:49:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:49:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:49:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:49:26,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-26 21:49:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:26,517 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:49:26,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:49:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:49:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:49:26,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:26,518 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-26 21:49:26,518 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:26,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-26 21:49:26,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:26,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:26,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:26,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:26,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:27,207 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 21:49:27,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:27,208 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 21:49:27,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:27,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:49:27,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:27,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:27,836 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 21:49:27,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:27,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-26 21:49:27,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:49:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:49:27,858 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:27,858 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-26 21:49:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:29,363 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-26 21:49:29,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:49:29,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-26 21:49:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:29,364 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:49:29,364 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:49:29,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:49:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:49:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:49:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:49:29,371 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-26 21:49:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:29,371 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:49:29,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:49:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:49:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:49:29,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:29,372 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-26 21:49:29,373 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:29,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-26 21:49:29,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:29,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:29,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:29,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:29,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:29,625 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 21:49:29,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:29,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:29,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:29,686 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:29,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:29,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:29,869 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 21:49:29,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:29,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-26 21:49:29,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:49:29,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:49:29,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:29,890 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-26 21:49:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:30,704 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-26 21:49:30,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:49:30,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-26 21:49:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:30,704 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:49:30,705 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:49:30,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:49:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-26 21:49:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:49:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:49:30,711 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-26 21:49:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:30,711 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:49:30,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:49:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:49:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:49:30,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:30,712 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-26 21:49:30,712 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:30,712 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:30,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-26 21:49:30,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:30,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:30,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:30,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:30,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:31,183 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 21:49:31,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:31,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:31,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:31,261 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:49:31,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:31,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:31,875 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 21:49:31,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:31,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-26 21:49:31,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:49:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:49:31,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:31,897 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-26 21:49:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:33,718 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-26 21:49:33,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:49:33,719 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-26 21:49:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:33,719 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:49:33,720 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:49:33,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:49:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:49:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:49:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:49:33,728 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-26 21:49:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:33,728 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:49:33,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:49:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:49:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:49:33,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:33,729 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-26 21:49:33,729 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:33,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:33,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-26 21:49:33,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:33,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:33,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:33,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:33,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:34,183 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 21:49:34,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:34,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:34,191 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:34,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-26 21:49:34,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:34,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:34,931 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 21:49:34,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:34,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-26 21:49:34,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:49:34,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:49:34,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:34,953 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-26 21:49:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:36,991 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-26 21:49:36,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:49:36,992 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-26 21:49:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:36,992 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:49:36,992 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:49:36,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:49:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:49:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:49:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:49:37,001 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-26 21:49:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:37,001 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:49:37,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:49:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:49:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:49:37,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:37,002 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-26 21:49:37,003 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:37,003 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:37,003 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-26 21:49:37,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:37,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:37,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:37,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:37,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:37,325 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 21:49:37,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:37,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:37,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:37,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:37,638 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 21:49:37,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:37,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-26 21:49:37,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:49:37,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:49:37,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:37,661 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-26 21:49:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:38,787 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-26 21:49:38,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:49:38,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-26 21:49:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:38,789 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:49:38,789 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:49:38,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:49:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-26 21:49:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:49:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:49:38,799 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-26 21:49:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:38,799 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:49:38,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:49:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:49:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:49:38,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:38,800 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-26 21:49:38,801 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:38,801 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-26 21:49:38,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:38,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:38,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:38,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:38,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:39,344 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 21:49:39,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:39,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:39,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:39,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:39,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:39,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:40,755 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 21:49:40,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:40,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-26 21:49:40,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:49:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:49:40,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:40,777 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-26 21:49:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:42,991 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-26 21:49:42,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:49:42,992 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-26 21:49:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:42,992 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:49:42,993 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:49:42,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:49:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:49:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:49:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:49:43,002 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-26 21:49:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:43,002 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:49:43,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:49:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:49:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:49:43,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:43,003 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-26 21:49:43,003 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:43,003 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-26 21:49:43,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:43,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:43,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:43,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:43,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:43,840 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 21:49:43,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:43,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:43,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:43,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-26 21:49:43,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:43,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:44,743 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 21:49:44,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:44,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-26 21:49:44,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:49:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:49:44,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:44,765 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-26 21:49:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:47,377 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-26 21:49:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:49:47,377 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-26 21:49:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:47,378 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:49:47,378 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:49:47,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:49:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:49:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:49:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:49:47,388 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-26 21:49:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:47,388 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:49:47,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:49:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:49:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:49:47,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:47,389 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-26 21:49:47,389 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:47,389 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-26 21:49:47,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:47,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:47,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:47,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:48,320 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 21:49:48,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:48,320 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 21:49:48,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:48,403 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:48,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:48,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:49,010 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 21:49:49,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:49,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-26 21:49:49,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:49:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:49:49,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:49,032 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-26 21:49:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:50,216 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:49:50,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:49:50,216 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-26 21:49:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:50,217 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:49:50,217 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:49:50,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:49:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-26 21:49:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:49:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:49:50,226 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-26 21:49:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:50,226 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:49:50,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:49:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:49:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:49:50,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:50,227 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-26 21:49:50,227 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:50,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-26 21:49:50,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:50,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:50,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:50,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:50,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:50,754 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 21:49:50,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:50,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:50,763 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:50,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:49:50,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:50,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:51,731 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 21:49:51,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:51,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-26 21:49:51,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:49:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:49:51,753 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:51,753 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-26 21:49:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:54,678 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-26 21:49:54,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:49:54,679 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-26 21:49:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:54,680 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:49:54,680 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:49:54,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:54,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:49:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:49:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:49:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:49:54,691 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-26 21:49:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:54,691 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:49:54,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:49:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:49:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:49:54,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:54,692 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-26 21:49:54,693 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:54,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:54,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-26 21:49:54,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:54,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:54,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:54,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:55,413 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 21:49:55,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:55,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:55,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:55,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:49:55,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:55,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:56,409 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 21:49:56,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:56,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-26 21:49:56,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:49:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:49:56,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:56,432 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-26 21:49:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:59,493 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-26 21:49:59,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:49:59,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-26 21:49:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:59,494 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:49:59,494 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:49:59,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:49:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:49:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:49:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:49:59,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-26 21:49:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:59,504 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:49:59,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:49:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:49:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:49:59,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:59,505 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-26 21:49:59,505 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:59,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:59,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-26 21:49:59,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:59,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:59,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:59,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:59,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:59,802 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 21:49:59,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:59,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:59,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:59,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:00,076 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 21:50:00,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:00,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-26 21:50:00,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:50:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:50:00,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:00,098 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-26 21:50:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:01,237 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-26 21:50:01,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:50:01,237 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-26 21:50:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:01,238 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:50:01,238 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:50:01,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:50:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-26 21:50:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:50:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:50:01,247 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-26 21:50:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:01,247 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:50:01,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:50:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:50:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:50:01,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:01,248 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-26 21:50:01,248 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:01,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-26 21:50:01,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:01,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:01,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:01,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:01,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:02,102 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 21:50:02,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:02,103 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 21:50:02,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:50:02,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:50:02,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:02,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:03,171 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 21:50:03,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:03,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-26 21:50:03,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:50:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:50:03,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:03,194 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-26 21:50:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:06,829 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-26 21:50:06,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:50:06,829 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-26 21:50:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:06,830 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:50:06,830 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:50:06,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:50:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:50:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:50:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:50:06,840 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-26 21:50:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:06,840 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:50:06,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:50:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:50:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:50:06,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:06,841 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-26 21:50:06,842 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:06,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-26 21:50:06,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:06,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:06,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:07,479 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 21:50:07,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:07,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:07,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:50:07,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:50:07,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:07,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:08,605 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 21:50:08,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:08,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-26 21:50:08,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:50:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:50:08,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:08,627 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-26 21:50:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:12,985 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-26 21:50:12,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:50:12,985 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-26 21:50:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:12,985 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:50:12,985 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:50:12,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:50:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:50:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:50:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:50:12,994 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-26 21:50:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:12,995 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:50:12,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:50:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:50:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:50:12,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:12,995 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-26 21:50:12,995 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:12,996 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:12,996 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-26 21:50:12,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:12,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:12,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:12,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:12,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:13,451 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 21:50:13,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:13,452 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 21:50:13,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:50:13,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:50:13,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:13,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:13,751 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 21:50:13,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:13,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-26 21:50:13,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:50:13,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:50:13,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:13,775 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-26 21:50:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:15,219 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-26 21:50:15,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:50:15,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-26 21:50:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:15,220 INFO L225 Difference]: With dead ends: 108 [2018-09-26 21:50:15,220 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:50:15,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:50:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-26 21:50:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:50:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:50:15,230 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-26 21:50:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:15,230 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:50:15,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:50:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:50:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:50:15,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:15,231 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-26 21:50:15,231 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:15,231 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:15,231 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-26 21:50:15,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:15,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:15,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:15,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:15,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:17,937 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 21:50:17,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:17,937 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 21:50:17,945 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:50:18,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-26 21:50:18,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:18,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:19,405 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 21:50:19,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:19,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-26 21:50:19,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:50:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:50:19,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:19,428 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-26 21:50:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:23,564 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-26 21:50:23,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:50:23,564 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-26 21:50:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:23,565 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:50:23,565 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:50:23,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:50:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:50:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:50:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:50:23,575 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-26 21:50:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:23,575 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:50:23,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:50:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:50:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:50:23,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:23,576 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-26 21:50:23,576 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:23,576 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-26 21:50:23,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:23,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:23,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:23,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:23,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:24,635 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 21:50:24,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:24,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:24,644 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:50:24,747 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:50:24,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:24,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:25,967 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 21:50:25,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:25,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-26 21:50:25,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:50:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:50:25,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:25,991 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-26 21:50:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:30,519 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-26 21:50:30,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:50:30,519 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-26 21:50:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:30,520 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:50:30,520 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:50:30,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:50:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:50:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:50:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:50:30,535 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-26 21:50:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:30,535 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:50:30,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:50:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:50:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:50:30,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:30,536 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-26 21:50:30,536 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:30,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-26 21:50:30,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:30,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:30,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:30,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:30,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:31,832 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 21:50:31,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:31,833 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 21:50:31,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:31,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:32,226 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 21:50:32,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:32,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-26 21:50:32,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:50:32,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:50:32,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:32,248 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-26 21:50:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:33,696 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:50:33,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:50:33,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-26 21:50:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:33,698 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:50:33,698 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:50:33,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:50:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-26 21:50:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:50:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:50:33,714 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-26 21:50:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:33,714 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:50:33,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:50:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:50:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:50:33,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:33,715 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-26 21:50:33,716 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:33,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-26 21:50:33,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:33,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:33,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:33,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:33,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:34,559 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 21:50:34,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:34,559 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 21:50:34,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:50:34,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:50:34,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:34,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:36,130 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 21:50:36,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:36,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-26 21:50:36,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:50:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:50:36,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:36,153 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-26 21:50:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:40,963 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-26 21:50:40,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:50:40,963 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-26 21:50:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:40,964 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:50:40,964 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:50:40,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:50:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:50:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:50:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:50:40,973 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-26 21:50:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:40,974 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:50:40,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:50:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:50:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:50:40,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:40,974 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-26 21:50:40,975 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:40,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:40,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-26 21:50:40,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:40,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:40,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:40,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:40,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:41,914 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 21:50:41,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:41,915 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 21:50:41,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:50:42,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:50:42,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:42,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:43,498 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 21:50:43,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:43,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-26 21:50:43,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:50:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:50:43,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:43,522 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-26 21:50:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:48,597 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-26 21:50:48,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:50:48,597 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-26 21:50:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:48,598 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:50:48,598 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:50:48,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:50:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:50:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:50:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:50:48,608 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-26 21:50:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:48,608 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:50:48,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:50:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:50:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:50:48,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:48,609 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-26 21:50:48,609 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:48,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-26 21:50:48,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:48,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:48,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:48,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:48,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:49,054 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 21:50:49,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:49,055 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 21:50:49,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:50:49,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:50:49,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:49,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:50,412 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 21:50:50,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:50,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-26 21:50:50,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:50:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:50:50,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:50,433 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-26 21:50:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:51,967 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-26 21:50:51,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:50:51,967 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-26 21:50:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:51,968 INFO L225 Difference]: With dead ends: 124 [2018-09-26 21:50:51,968 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:50:51,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:50:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-26 21:50:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:50:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-26 21:50:51,985 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-26 21:50:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:51,985 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-26 21:50:51,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:50:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-26 21:50:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:50:51,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:51,986 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-26 21:50:51,987 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:51,987 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-26 21:50:51,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:51,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:51,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:51,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:51,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:52,886 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 21:50:52,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:52,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:52,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:50:53,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:50:53,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:53,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:54,631 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 21:50:54,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:54,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-26 21:50:54,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:50:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:50:54,655 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:54,655 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-26 21:51:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:00,759 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-26 21:51:00,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:51:00,759 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-26 21:51:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:00,760 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:51:00,760 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:51:00,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:51:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:51:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:51:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-26 21:51:00,775 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-26 21:51:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:00,775 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-26 21:51:00,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:51:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-26 21:51:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:51:00,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:00,776 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-26 21:51:00,776 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:00,776 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-26 21:51:00,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:00,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:00,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:00,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:00,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:01,735 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 21:51:01,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:01,735 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 21:51:01,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:51:01,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-26 21:51:01,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:01,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:03,718 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 21:51:03,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:03,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-26 21:51:03,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:51:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:51:03,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:03,741 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-26 21:51:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:10,187 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-26 21:51:10,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:51:10,188 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-26 21:51:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:10,188 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:51:10,188 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:51:10,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:51:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:51:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:51:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-26 21:51:10,206 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-26 21:51:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:10,206 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-26 21:51:10,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:51:10,206 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-26 21:51:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:51:10,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:10,207 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-26 21:51:10,207 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:10,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:10,207 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-26 21:51:10,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:10,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:10,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:10,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:10,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:10,717 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 21:51:10,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:10,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:51:10,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:10,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:11,127 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 21:51:11,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:11,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-26 21:51:11,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:51:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:51:11,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:11,149 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-26 21:51:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:12,824 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-26 21:51:12,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:51:12,824 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-26 21:51:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:12,825 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:51:12,825 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:51:12,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:51:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-26 21:51:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:51:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-26 21:51:12,838 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-26 21:51:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:12,838 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-26 21:51:12,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:51:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-26 21:51:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:51:12,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:12,839 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-26 21:51:12,839 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:12,840 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-26 21:51:12,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:12,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:12,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:12,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:12,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:13,787 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 21:51:13,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:13,787 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 21:51:13,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:51:13,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:51:13,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:13,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:15,834 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 21:51:15,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:15,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-26 21:51:15,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:51:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:51:15,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:15,856 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-26 21:51:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:22,808 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-26 21:51:22,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:51:22,808 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-26 21:51:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:22,809 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:51:22,809 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:51:22,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:51:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:51:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:51:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-26 21:51:22,824 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-26 21:51:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:22,825 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-26 21:51:22,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:51:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-26 21:51:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:51:22,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:22,825 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-26 21:51:22,826 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:22,826 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-26 21:51:22,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:22,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:22,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:22,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:22,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:24,924 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 21:51:24,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:24,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:51:24,933 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:51:25,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-26 21:51:25,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:25,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:27,127 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 21:51:27,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:27,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-26 21:51:27,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:51:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:51:27,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:27,150 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-26 21:51:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:34,682 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-26 21:51:34,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:51:34,683 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-26 21:51:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:34,683 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:51:34,683 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:51:34,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:51:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:51:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:51:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-26 21:51:34,703 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-26 21:51:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:34,703 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-26 21:51:34,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:51:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-26 21:51:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:51:34,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:34,705 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-26 21:51:34,705 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:34,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:34,705 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-26 21:51:34,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:34,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:34,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:34,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:34,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:35,418 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 21:51:35,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:35,418 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 21:51:35,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:51:35,528 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:51:35,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:35,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:36,133 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 21:51:36,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:36,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-26 21:51:36,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:51:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:51:36,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:36,156 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-26 21:51:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:37,960 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:51:37,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:51:37,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-26 21:51:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:37,961 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:51:37,961 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:51:37,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:51:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-26 21:51:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:51:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-26 21:51:37,977 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-26 21:51:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:37,977 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-26 21:51:37,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:51:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-26 21:51:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:51:37,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:37,978 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-26 21:51:37,978 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:37,978 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:37,979 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-26 21:51:37,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:37,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:37,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:37,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:37,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:39,025 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 21:51:39,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:39,026 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 21:51:39,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:51:39,183 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:51:39,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:39,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:42,757 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 21:51:42,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:42,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-26 21:51:42,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:51:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:51:42,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:42,781 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-26 21:51:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:51,144 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-26 21:51:51,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:51:51,144 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-26 21:51:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:51,145 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:51:51,145 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:51:51,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:51:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:51:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:51:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-26 21:51:51,158 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-26 21:51:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:51,158 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-26 21:51:51,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:51:51,159 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-26 21:51:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:51:51,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:51,159 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-26 21:51:51,159 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:51,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:51,160 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-26 21:51:51,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:51,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:51,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:51,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:51,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:52,492 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 21:51:52,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:52,493 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 21:51:52,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:51:52,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:51:52,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:52,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:54,784 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 21:51:54,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:54,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-26 21:51:54,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:51:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:51:54,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:54,808 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-26 21:52:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:03,871 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-26 21:52:03,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:52:03,872 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-26 21:52:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:03,872 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:52:03,872 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:52:03,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:52:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:52:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:52:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-26 21:52:03,893 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-26 21:52:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:03,893 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-26 21:52:03,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:52:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-26 21:52:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:52:03,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:03,894 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-26 21:52:03,895 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:03,895 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-26 21:52:03,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:03,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:03,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:03,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:03,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:04,660 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 21:52:04,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:04,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:04,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:52:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:04,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:05,088 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 21:52:05,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:05,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-26 21:52:05,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:52:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:52:05,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:05,109 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-26 21:52:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:07,208 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-26 21:52:07,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:52:07,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-26 21:52:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:07,209 INFO L225 Difference]: With dead ends: 148 [2018-09-26 21:52:07,209 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:52:07,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:52:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-26 21:52:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:52:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-26 21:52:07,227 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-26 21:52:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:07,227 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-26 21:52:07,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:52:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-26 21:52:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:52:07,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:07,228 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-26 21:52:07,228 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:07,229 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-26 21:52:07,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:07,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:07,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:07,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:52:07,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:08,350 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 21:52:08,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:08,351 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 21:52:08,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:52:08,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:52:08,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:08,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:10,740 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 21:52:10,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:10,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-26 21:52:10,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:52:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:52:10,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:10,763 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-26 21:52:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:20,432 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-26 21:52:20,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:52:20,432 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-26 21:52:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:20,433 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:52:20,433 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:52:20,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:52:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:52:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:52:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-26 21:52:20,449 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-26 21:52:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:20,449 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-26 21:52:20,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:52:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-26 21:52:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:52:20,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:20,450 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-26 21:52:20,450 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:20,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-26 21:52:20,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:20,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:20,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:21,572 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 21:52:21,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:21,573 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 21:52:21,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:52:21,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:52:21,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:21,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:24,271 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 21:52:24,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:24,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-26 21:52:24,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:52:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:52:24,307 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:24,307 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-26 21:52:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:34,605 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-26 21:52:34,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:52:34,605 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-26 21:52:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:34,606 INFO L225 Difference]: With dead ends: 223 [2018-09-26 21:52:34,606 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:52:34,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:52:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:52:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:52:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-26 21:52:34,622 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-26 21:52:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:34,622 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-26 21:52:34,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:52:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-26 21:52:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:52:34,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:34,623 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-26 21:52:34,623 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:34,623 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-26 21:52:34,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:34,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:34,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:34,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:34,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:35,101 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 21:52:35,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:35,102 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 21:52:35,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:52:35,226 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:52:35,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:35,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:35,563 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 21:52:35,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:35,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-26 21:52:35,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:52:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:52:35,584 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:35,584 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-26 21:52:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:37,837 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-26 21:52:37,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:52:37,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-26 21:52:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:37,838 INFO L225 Difference]: With dead ends: 156 [2018-09-26 21:52:37,838 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:52:37,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:52:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-26 21:52:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:52:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-26 21:52:37,857 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-26 21:52:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:37,857 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-26 21:52:37,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:52:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-26 21:52:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:52:37,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:37,858 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-26 21:52:37,858 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:37,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-26 21:52:37,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:37,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:37,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:37,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:37,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:39,017 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 21:52:39,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:39,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:39,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:52:39,255 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-26 21:52:39,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:39,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:41,873 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 21:52:41,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:41,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-26 21:52:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:52:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:52:41,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:41,897 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-26 21:52:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:53,079 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-26 21:52:53,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:52:53,079 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-26 21:52:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:53,080 INFO L225 Difference]: With dead ends: 233 [2018-09-26 21:52:53,080 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:52:53,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:52:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:52:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:52:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-26 21:52:53,096 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-26 21:52:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:53,096 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-26 21:52:53,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:52:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-26 21:52:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:52:53,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:53,097 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-26 21:52:53,097 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:53,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-26 21:52:53,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:53,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:53,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:53,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:53,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:54,265 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 21:52:54,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:54,266 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 21:52:54,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:52:54,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-26 21:52:54,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:54,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:57,105 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 21:52:57,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:57,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-26 21:52:57,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 21:52:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 21:52:57,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:57,129 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. Received shutdown request... [2018-09-26 21:52:58,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:52:58,226 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:52:58,231 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:52:58,231 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:52:58 BoogieIcfgContainer [2018-09-26 21:52:58,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:52:58,232 INFO L168 Benchmark]: Toolchain (without parser) took 246386.12 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 92.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 368.9 MB). Peak memory consumption was 461.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:52:58,234 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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 21:52:58,234 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.41 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 21:52:58,234 INFO L168 Benchmark]: Boogie Preprocessor took 23.01 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 21:52:58,235 INFO L168 Benchmark]: RCFGBuilder took 400.82 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 21:52:58,236 INFO L168 Benchmark]: TraceAbstraction took 245910.73 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 92.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 347.8 MB). Peak memory consumption was 440.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:52:58,239 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.41 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 23.01 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 400.82 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 245910.73 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 92.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 347.8 MB). Peak memory consumption was 440.1 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 constructing difference of abstraction (155states) and FLOYD_HOARE automaton (currently 42 states, 114 states before enhancement), while ReachableStatesComputation was computing reachable states (82 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 245.8s OverallTime, 56 OverallIterations, 38 TraceHistogramMax, 153.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1250 SDtfs, 1011 SDslu, 12886 SDs, 0 SdLazy, 13518 SolverSat, 2409 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7719 GetRequests, 4090 SyntacticMatches, 0 SemanticMatches, 3629 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 55 MinimizatonAttempts, 18 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 83.4s InterpolantComputationTime, 9006 NumberOfCodeBlocks, 9006 NumberOfCodeBlocksAsserted, 677 NumberOfCheckSat, 8896 ConstructedInterpolants, 0 QuantifiedInterpolants, 3624327 SizeOfPredicates, 162 NumberOfNonLiveVariables, 24296 ConjunctsInSsa, 2345 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 55530/108270 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-52-58-250.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-52-58-250.csv Completed graceful shutdown