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/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:42:39,642 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:42:39,644 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:42:39,659 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:42:39,660 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:42:39,661 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:42:39,662 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:42:39,664 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:42:39,665 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:42:39,666 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:42:39,667 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:42:39,698 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 [2018-09-28 10:42:39,724 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:42:39,724 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:42:39,725 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:42:39,725 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:42:39,729 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:42:39,730 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:42:39,730 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:42:39,730 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:42:39,731 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:42:39,731 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:42:39,731 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:42:39,732 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:42:39,732 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:42:39,732 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:42:39,732 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:42:39,732 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:42:39,732 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:42:39,733 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:42:39,734 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:42:39,734 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:42:39,734 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:42:39,734 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:42:39,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:42:39,735 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:42:39,735 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:42:39,735 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:42:39,735 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:42:39,736 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:42:39,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:42:39,736 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:42:39,736 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:42:39,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:42:39,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:42:39,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:42:39,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:42:39,828 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:42:39,829 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-28 10:42:39,829 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-28 10:42:39,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:42:39,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:42:39,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:42:39,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:42:39,882 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:42:39,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,922 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:42:39,923 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:42:39,923 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:42:39,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:42:39,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:42:39,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:42:39,926 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:42:39,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/1) ... [2018-09-28 10:42:39,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:42:39,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:42:39,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:42:39,946 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:42:39,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (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 [2018-09-28 10:42:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-28 10:42:40,016 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-28 10:42:40,298 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:42:40,298 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:42:40 BoogieIcfgContainer [2018-09-28 10:42:40,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:42:40,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:42:40,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:42:40,304 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:42:40,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:39" (1/2) ... [2018-09-28 10:42:40,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e923490 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:42:40, skipping insertion in model container [2018-09-28 10:42:40,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:42:40" (2/2) ... [2018-09-28 10:42:40,308 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-28 10:42:40,320 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:42:40,331 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-28 10:42:40,383 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:42:40,384 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:42:40,384 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:42:40,384 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:42:40,384 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:42:40,385 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:42:40,385 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:42:40,385 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:42:40,385 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:42:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-28 10:42:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:42:40,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:40,412 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:42:40,414 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:40,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-28 10:42:40,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:40,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:40,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:40,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:40,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:40,560 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:42:40,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:42:40,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:42:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:42:40,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:40,579 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-28 10:42:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:40,849 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-28 10:42:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:42:40,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-28 10:42:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:40,864 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:42:40,864 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:42:40,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:42:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:42:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:42:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-28 10:42:40,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-28 10:42:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:40,903 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-28 10:42:40,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:42:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-28 10:42:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:42:40,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:40,904 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:42:40,905 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:40,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-28 10:42:40,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:40,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:40,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:40,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:40,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:40,943 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:42:40,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:42:40,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:42:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:42:40,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:40,945 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-28 10:42:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:41,002 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-28 10:42:41,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:42:41,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-28 10:42:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:41,003 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:42:41,003 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:42:41,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:42:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:42:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:42:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-28 10:42:41,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-28 10:42:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:41,008 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-28 10:42:41,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:42:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-28 10:42:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:42:41,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:41,010 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-28 10:42:41,010 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:41,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-28 10:42:41,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:41,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:41,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:41,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,050 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:42:41,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-28 10:42:41,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:42:41,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:42:41,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:41,050 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-28 10:42:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:41,189 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-28 10:42:41,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:42:41,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-28 10:42:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:41,190 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:42:41,190 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:42:41,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:42:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:42:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:42:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-28 10:42:41,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-28 10:42:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:41,195 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-28 10:42:41,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:42:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-28 10:42:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:42:41,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:41,197 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-28 10:42:41,197 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:41,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-28 10:42:41,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:41,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:41,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:41,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:41,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:41,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:41,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:41,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-28 10:42:41,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:42:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:42:41,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:41,569 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-28 10:42:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:41,732 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-28 10:42:41,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:42:41,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-28 10:42:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:41,734 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:42:41,734 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:42:41,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:42:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-28 10:42:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:42:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-28 10:42:41,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-28 10:42:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:41,739 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-28 10:42:41,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:42:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-28 10:42:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:42:41,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:41,740 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-28 10:42:41,741 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:41,741 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:41,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-28 10:42:41,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:41,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:41,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:41,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:41,801 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 [2018-09-28 10:42:41,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:41,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:41,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:41,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:41,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:42:41,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:42:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:42:41,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:41,907 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-28 10:42:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:42,141 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-28 10:42:42,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:42:42,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:42:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:42,143 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:42:42,143 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:42:42,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:42:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:42:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:42:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-28 10:42:42,147 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-28 10:42:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:42,147 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-28 10:42:42,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:42:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-28 10:42:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:42:42,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:42,148 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-28 10:42:42,148 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:42,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-28 10:42:42,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:42,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:42,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:42,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:42,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:42,219 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 [2018-09-28 10:42:42,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:42,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-28 10:42:42,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:42,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:42,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:42:42,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:42:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:42:42,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:42,293 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-28 10:42:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:42,639 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-28 10:42:42,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:42:42,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:42:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:42,641 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:42:42,641 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:42:42,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:42:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:42:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:42:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-28 10:42:42,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-28 10:42:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:42,648 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-28 10:42:42,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:42:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-28 10:42:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:42:42,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:42,650 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-28 10:42:42,651 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:42,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-28 10:42:42,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:42,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:42,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:42,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:42,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:42,877 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 [2018-09-28 10:42:42,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:42,894 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:42,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:42,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:42,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:42:42,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:42:42,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:42:42,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:42,980 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-28 10:42:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:43,164 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-28 10:42:43,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:42:43,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-28 10:42:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:43,166 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:42:43,166 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:42:43,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:42:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-28 10:42:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:42:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-28 10:42:43,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-28 10:42:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:43,171 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-28 10:42:43,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:42:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-28 10:42:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:42:43,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:43,172 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-28 10:42:43,172 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:43,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-28 10:42:43,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:43,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:43,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:43,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:43,239 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 [2018-09-28 10:42:43,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:43,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-28 10:42:43,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:43,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:43,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:42:43,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:42:43,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:42:43,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:43,433 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-28 10:42:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:43,588 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-28 10:42:43,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:42:43,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-28 10:42:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:43,591 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:42:43,591 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:42:43,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:42:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:42:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:42:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-28 10:42:43,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-28 10:42:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:43,595 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-28 10:42:43,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:42:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-28 10:42:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:42:43,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:43,596 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-28 10:42:43,596 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:43,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-28 10:42:43,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:43,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:43,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:43,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:43,665 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 [2018-09-28 10:42:43,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:43,680 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-28 10:42:43,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:43,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:43,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:42:43,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:42:43,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:42:43,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:43,769 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-28 10:42:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:43,886 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-28 10:42:43,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:42:43,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-28 10:42:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:43,887 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:42:43,887 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:42:43,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:42:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:42:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:42:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-28 10:42:43,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-28 10:42:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:43,890 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-28 10:42:43,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:42:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-28 10:42:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:42:43,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:43,891 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:42:43,892 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:43,892 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:43,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-28 10:42:43,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:43,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:43,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:43,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:43,974 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 [2018-09-28 10:42:43,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:43,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:44,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:42:44,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:42:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:42:44,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:44,067 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-28 10:42:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:44,394 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-28 10:42:44,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:42:44,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-28 10:42:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:44,395 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:42:44,396 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:42:44,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:42:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-28 10:42:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:42:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-28 10:42:44,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-28 10:42:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:44,400 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-28 10:42:44,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:42:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-28 10:42:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:42:44,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:44,401 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-28 10:42:44,401 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:44,401 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-28 10:42:44,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:44,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:44,466 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 [2018-09-28 10:42:44,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:44,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:44,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:44,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:44,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:42:44,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:42:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:42:44,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:44,550 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-28 10:42:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:44,644 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-28 10:42:44,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:42:44,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-28 10:42:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:44,645 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:42:44,645 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:42:44,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:42:44,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:42:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:42:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-28 10:42:44,650 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-28 10:42:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:44,650 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-28 10:42:44,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:42:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-28 10:42:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:42:44,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:44,651 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-28 10:42:44,651 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:44,652 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-28 10:42:44,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:44,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:44,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:44,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:44,743 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 [2018-09-28 10:42:44,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:44,761 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:42:44,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:44,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:44,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:42:44,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:42:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:42:44,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:44,832 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-28 10:42:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:44,948 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-28 10:42:44,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:42:44,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-28 10:42:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:44,950 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:42:44,950 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:42:44,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:42:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:42:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:42:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-28 10:42:44,954 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-28 10:42:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:44,954 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-28 10:42:44,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:42:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-28 10:42:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:42:44,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:44,955 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-28 10:42:44,956 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:44,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-28 10:42:44,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:44,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:44,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:44,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:45,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:45,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:45,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:45,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:45,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:45,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:42:45,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:42:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:42:45,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:45,145 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-28 10:42:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:45,400 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-28 10:42:45,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:42:45,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-28 10:42:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:45,401 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:42:45,401 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:42:45,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:42:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-28 10:42:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:42:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-28 10:42:45,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-28 10:42:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:45,406 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-28 10:42:45,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:42:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-28 10:42:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:42:45,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:45,407 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-28 10:42:45,408 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:45,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-28 10:42:45,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:45,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:45,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:45,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:45,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:45,536 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 [2018-09-28 10:42:45,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:45,555 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:42:45,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:45,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:45,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:42:45,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:42:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:42:45,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:45,634 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-28 10:42:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:45,738 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-28 10:42:45,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:42:45,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-28 10:42:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:45,744 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:42:45,744 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:42:45,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:42:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:42:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:42:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-28 10:42:45,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-28 10:42:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:45,748 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-28 10:42:45,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:42:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-28 10:42:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:42:45,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:45,749 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-28 10:42:45,749 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:45,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:45,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-28 10:42:45,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:45,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:45,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:45,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:45,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:45,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:45,828 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:45,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:42:45,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:45,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:45,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:45,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:42:45,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:42:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:42:45,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:45,916 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-28 10:42:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:46,011 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-28 10:42:46,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:42:46,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-28 10:42:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:46,012 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:42:46,012 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:42:46,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:42:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:42:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:42:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-28 10:42:46,016 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-28 10:42:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:46,017 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-28 10:42:46,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:42:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-28 10:42:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:42:46,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:46,018 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-28 10:42:46,018 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:46,018 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-28 10:42:46,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:46,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:46,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:46,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:46,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:46,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:46,229 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 [2018-09-28 10:42:46,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:46,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:46,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:46,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:42:46,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:42:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:42:46,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:46,375 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-28 10:42:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:46,828 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-28 10:42:46,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:42:46,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-28 10:42:46,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:46,829 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:42:46,829 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:42:46,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:42:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-28 10:42:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:42:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-28 10:42:46,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-28 10:42:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:46,834 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-28 10:42:46,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:42:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-28 10:42:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:42:46,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:46,835 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-28 10:42:46,836 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:46,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-28 10:42:46,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:46,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:46,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:46,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:46,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:46,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:46,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:46,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:47,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:47,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:47,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:47,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:42:47,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:42:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:42:47,110 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:47,110 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-28 10:42:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:47,282 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-28 10:42:47,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:42:47,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-28 10:42:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:47,283 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:42:47,283 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:42:47,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:42:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:42:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:42:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-28 10:42:47,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-28 10:42:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:47,289 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-28 10:42:47,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:42:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-28 10:42:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:42:47,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:47,289 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-28 10:42:47,290 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:47,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-28 10:42:47,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:47,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:47,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:47,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:47,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:47,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:47,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:47,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:42:47,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:47,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:47,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:42:47,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:42:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:42:47,545 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:47,545 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-28 10:42:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:47,654 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-28 10:42:47,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:42:47,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-28 10:42:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:47,655 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:42:47,655 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:42:47,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:42:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:42:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:42:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-28 10:42:47,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-28 10:42:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:47,660 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-28 10:42:47,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:42:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-28 10:42:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:47,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:47,661 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-28 10:42:47,661 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:47,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-28 10:42:47,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:47,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:47,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:47,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:47,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:47,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:47,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:47,878 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:47,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:47,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:48,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:48,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:42:48,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:42:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:42:48,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:48,185 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-28 10:42:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:48,904 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-28 10:42:48,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:42:48,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-28 10:42:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:48,905 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:42:48,905 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:42:48,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:42:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-28 10:42:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:42:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-28 10:42:48,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-28 10:42:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:48,910 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-28 10:42:48,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:42:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-28 10:42:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:42:48,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:48,911 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-28 10:42:48,911 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:48,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-28 10:42:48,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:48,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:48,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:48,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:48,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:49,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:49,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:49,023 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-28 10:42:49,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:49,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:49,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:49,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:49,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:49,100 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-28 10:42:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:49,282 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-28 10:42:49,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:49,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-28 10:42:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:49,283 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:42:49,283 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:42:49,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:42:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:42:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:42:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-28 10:42:49,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-28 10:42:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:49,288 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-28 10:42:49,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-28 10:42:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:42:49,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:49,289 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-28 10:42:49,289 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:49,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-28 10:42:49,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:49,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:49,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:49,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:49,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:49,405 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 [2018-09-28 10:42:49,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:49,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-28 10:42:49,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:49,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:49,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:49,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:49,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:49,489 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-28 10:42:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:49,624 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-28 10:42:49,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:49,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-28 10:42:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:49,625 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:42:49,625 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:42:49,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:42:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:42:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:42:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-28 10:42:49,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-28 10:42:49,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:49,630 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-28 10:42:49,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-28 10:42:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:49,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:49,630 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-28 10:42:49,631 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:49,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-28 10:42:49,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:49,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:49,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:49,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:49,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:49,762 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 [2018-09-28 10:42:49,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:49,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:49,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:42:49,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:49,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:49,875 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-28 10:42:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:50,552 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-28 10:42:50,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:50,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-28 10:42:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:50,556 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:42:50,556 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:42:50,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:42:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-28 10:42:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:42:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-28 10:42:50,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-28 10:42:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:50,560 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-28 10:42:50,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-28 10:42:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:42:50,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:50,561 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-28 10:42:50,561 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:50,561 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-28 10:42:50,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:50,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:50,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:50,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:50,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:50,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:50,657 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 [2018-09-28 10:42:50,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:50,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:50,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:50,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:50,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:50,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:50,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:50,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:50,883 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-28 10:42:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:51,053 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-28 10:42:51,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:51,060 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-28 10:42:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:51,060 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:42:51,060 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:42:51,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:42:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:42:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:42:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-28 10:42:51,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-28 10:42:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:51,067 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-28 10:42:51,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-28 10:42:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:42:51,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:51,068 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-28 10:42:51,069 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:51,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-28 10:42:51,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:51,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:51,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:51,201 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 [2018-09-28 10:42:51,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:51,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:42:51,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:51,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:51,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:51,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:51,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:51,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:51,588 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-28 10:42:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:51,868 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-28 10:42:51,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:51,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-28 10:42:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:51,869 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:42:51,869 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:42:51,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:42:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:42:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:42:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-28 10:42:51,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-28 10:42:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:51,874 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-28 10:42:51,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-28 10:42:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:42:51,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:51,875 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-28 10:42:51,875 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:51,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-28 10:42:51,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:51,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:51,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:51,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:52,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:52,034 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 [2018-09-28 10:42:52,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:52,054 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:52,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:52,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:52,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:52,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:52,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:52,123 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:52,123 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-28 10:42:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:52,765 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-28 10:42:52,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:52,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-28 10:42:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:52,767 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:42:52,767 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:42:52,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:42:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-28 10:42:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:42:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-28 10:42:52,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-28 10:42:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:52,772 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-28 10:42:52,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-28 10:42:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:42:52,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:52,773 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-28 10:42:52,773 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:52,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-28 10:42:52,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:52,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:52,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:52,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:53,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:53,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:53,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:42:53,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:53,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:53,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:42:53,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:42:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:42:53,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:53,250 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-28 10:42:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:53,404 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-28 10:42:53,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:42:53,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-28 10:42:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:53,406 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:42:53,406 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:42:53,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:42:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:42:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:42:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-28 10:42:53,410 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-28 10:42:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:53,411 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-28 10:42:53,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:42:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-28 10:42:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:42:53,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:53,412 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-28 10:42:53,412 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:53,412 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-28 10:42:53,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:53,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:53,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:53,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:53,547 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 [2018-09-28 10:42:53,557 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:53,570 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:42:53,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:53,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:53,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:42:53,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:42:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:42:53,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:53,625 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-28 10:42:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:53,765 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-28 10:42:53,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:42:53,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-28 10:42:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:53,766 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:42:53,767 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:42:53,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:42:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:42:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:42:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-28 10:42:53,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-28 10:42:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:53,771 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-28 10:42:53,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:42:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-28 10:42:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:42:53,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:53,772 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-28 10:42:53,772 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:53,772 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-28 10:42:53,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:53,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:53,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:53,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:54,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:54,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:54,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:54,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:54,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:42:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:42:54,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:54,283 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-28 10:42:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:55,061 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-28 10:42:55,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:42:55,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-28 10:42:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:55,062 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:42:55,062 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:42:55,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:42:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:42:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:42:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-28 10:42:55,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-28 10:42:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:55,066 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-28 10:42:55,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:42:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-28 10:42:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:42:55,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:55,067 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-28 10:42:55,067 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:55,068 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:55,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-28 10:42:55,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:55,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:55,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:55,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:55,185 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 [2018-09-28 10:42:55,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:55,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:55,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:55,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:55,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:55,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:42:55,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:42:55,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:42:55,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:55,305 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-28 10:42:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:55,624 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-28 10:42:55,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:42:55,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-28 10:42:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:55,625 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:42:55,625 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:42:55,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:42:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:42:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:42:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-28 10:42:55,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-28 10:42:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:55,630 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-28 10:42:55,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:42:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-28 10:42:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:42:55,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:55,631 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-28 10:42:55,631 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:55,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-28 10:42:55,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:55,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:55,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:55,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:56,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:56,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:56,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:56,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:42:56,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:56,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:56,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:56,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:42:56,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:42:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:42:56,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:56,757 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-28 10:42:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:56,938 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-28 10:42:56,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:42:56,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-28 10:42:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:56,939 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:42:56,939 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:42:56,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:42:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:42:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:42:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-28 10:42:56,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-28 10:42:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:56,944 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-28 10:42:56,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:42:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-28 10:42:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:42:56,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:56,944 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-28 10:42:56,945 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:56,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-28 10:42:56,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:56,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:56,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:56,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:57,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:57,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:57,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:57,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:57,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:57,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:57,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:57,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:42:57,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:42:57,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:42:57,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:57,673 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-28 10:42:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:58,686 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-28 10:42:58,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:42:58,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-28 10:42:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:58,687 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:42:58,687 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:42:58,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:42:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-28 10:42:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:42:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-28 10:42:58,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-28 10:42:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:58,691 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-28 10:42:58,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:42:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-28 10:42:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:42:58,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:58,692 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-28 10:42:58,693 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:58,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-28 10:42:58,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:58,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:58,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:58,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:58,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:58,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:58,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:42:58,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:58,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:58,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:58,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:42:58,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:42:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:42:58,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:58,924 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-28 10:42:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:59,160 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-28 10:42:59,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:42:59,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-28 10:42:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:59,161 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:42:59,161 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:42:59,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:42:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:42:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:42:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-28 10:42:59,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-28 10:42:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:59,167 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-28 10:42:59,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:42:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-28 10:42:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:42:59,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:59,168 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-28 10:42:59,168 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:59,168 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:59,168 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-28 10:42:59,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:59,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:59,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:59,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:59,365 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 [2018-09-28 10:42:59,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:59,400 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:42:59,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:59,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:59,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:42:59,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:42:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:42:59,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:59,557 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-28 10:42:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:59,720 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-28 10:42:59,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:42:59,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-28 10:42:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:59,721 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:42:59,722 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:42:59,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:42:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:42:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:42:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-28 10:42:59,726 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-28 10:42:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:59,726 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-28 10:42:59,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:42:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-28 10:42:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:42:59,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:59,727 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-28 10:42:59,727 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:59,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-28 10:42:59,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:59,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:59,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:59,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:00,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:00,021 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 [2018-09-28 10:43:00,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:00,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:00,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:00,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:43:00,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:43:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:43:00,114 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:00,114 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-28 10:43:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:01,112 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-28 10:43:01,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:43:01,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-28 10:43:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:01,113 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:43:01,113 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:43:01,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:43:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:43:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-28 10:43:01,117 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-28 10:43:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:01,118 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-28 10:43:01,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:43:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-28 10:43:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:43:01,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:01,118 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-28 10:43:01,119 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:01,119 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-28 10:43:01,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:01,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:01,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:01,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:01,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:01,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:01,314 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 [2018-09-28 10:43:01,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:01,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:01,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:01,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:01,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:01,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:43:01,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:43:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:43:01,400 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:01,401 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-28 10:43:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:01,883 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-28 10:43:01,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:43:01,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-28 10:43:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:01,884 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:43:01,884 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:43:01,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:43:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:43:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:43:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-28 10:43:01,887 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-28 10:43:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:01,887 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-28 10:43:01,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:43:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-28 10:43:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:43:01,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:01,889 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-28 10:43:01,889 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:01,889 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-28 10:43:01,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:01,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:01,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:01,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:01,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:02,014 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 [2018-09-28 10:43:02,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:02,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:43:02,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:02,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:02,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:43:02,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:43:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:43:02,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:02,103 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-28 10:43:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:02,588 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-28 10:43:02,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:43:02,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-28 10:43:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:02,589 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:43:02,589 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:43:02,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:43:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:43:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-28 10:43:02,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-28 10:43:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:02,594 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-28 10:43:02,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:43:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-28 10:43:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:43:02,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:02,595 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-28 10:43:02,595 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:02,595 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-28 10:43:02,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:02,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:02,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:02,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:02,780 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 [2018-09-28 10:43:02,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:02,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:02,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:02,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:02,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:43:02,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:43:02,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:43:02,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:02,902 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-28 10:43:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:04,093 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-28 10:43:04,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:43:04,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-28 10:43:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:04,095 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:43:04,095 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:43:04,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:43:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-28 10:43:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-28 10:43:04,100 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-28 10:43:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:04,100 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-28 10:43:04,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:43:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-28 10:43:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:43:04,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:04,101 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-28 10:43:04,101 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:04,101 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-28 10:43:04,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:04,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:04,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:04,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:04,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:04,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:04,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:04,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:43:04,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:04,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:04,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:04,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:43:04,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:43:04,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:43:04,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:04,531 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-28 10:43:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:04,862 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-28 10:43:04,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:43:04,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-28 10:43:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:04,863 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:43:04,863 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:43:04,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:43:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:43:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:43:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-28 10:43:04,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-28 10:43:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:04,868 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-28 10:43:04,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:43:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-28 10:43:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:43:04,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:04,868 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-28 10:43:04,868 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:04,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-28 10:43:04,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:04,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:04,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:04,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:05,031 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 [2018-09-28 10:43:05,040 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:05,061 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:43:05,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:05,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:05,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:43:05,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:43:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:43:05,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:05,188 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-28 10:43:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:05,400 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-28 10:43:05,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:43:05,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-28 10:43:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:05,402 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:43:05,402 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:43:05,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:43:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:43:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-28 10:43:05,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-28 10:43:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:05,406 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-28 10:43:05,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:43:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-28 10:43:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:43:05,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:05,406 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-28 10:43:05,406 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:05,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-28 10:43:05,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:05,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:05,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:05,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:05,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:05,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:05,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:05,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:05,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:43:05,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:43:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:43:05,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:05,724 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-28 10:43:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:07,172 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-28 10:43:07,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:43:07,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-28 10:43:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:07,173 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:43:07,173 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:07,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:43:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-28 10:43:07,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-28 10:43:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:07,177 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-28 10:43:07,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:43:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-28 10:43:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:43:07,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:07,177 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-28 10:43:07,178 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:07,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-28 10:43:07,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:07,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:07,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:07,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:07,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:07,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:07,797 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 [2018-09-28 10:43:07,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:07,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:07,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:07,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:07,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:07,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:43:07,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:43:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:43:07,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:07,902 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-28 10:43:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:08,279 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-28 10:43:08,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:43:08,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-28 10:43:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:08,280 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:43:08,280 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:43:08,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:43:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:43:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:43:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-28 10:43:08,283 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-28 10:43:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:08,283 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-28 10:43:08,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:43:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-28 10:43:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:43:08,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:08,284 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-28 10:43:08,284 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:08,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-28 10:43:08,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:08,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:08,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:08,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:08,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:08,467 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 [2018-09-28 10:43:08,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:08,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:43:08,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:08,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:08,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:08,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:43:08,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:43:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:43:08,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:08,581 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-28 10:43:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:08,772 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-28 10:43:08,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:43:08,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-28 10:43:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:08,773 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:43:08,773 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:43:08,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:43:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:43:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-28 10:43:08,776 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-28 10:43:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:08,776 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-28 10:43:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:43:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-28 10:43:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:43:08,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:08,777 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-28 10:43:08,777 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:08,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-28 10:43:08,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:08,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:08,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:08,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:08,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:09,014 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:09,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:09,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:09,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:09,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:43:09,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:43:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:43:09,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:09,199 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-28 10:43:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:10,654 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-28 10:43:10,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:43:10,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-28 10:43:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:10,656 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:43:10,656 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:43:10,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:43:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-28 10:43:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:43:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-28 10:43:10,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-28 10:43:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:10,660 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-28 10:43:10,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:43:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-28 10:43:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:43:10,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:10,660 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-28 10:43:10,661 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:10,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:10,661 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-28 10:43:10,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:10,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:10,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:10,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:10,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:10,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:10,786 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 [2018-09-28 10:43:10,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:10,816 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:10,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:10,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:10,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:10,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:43:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:43:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:43:10,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:10,907 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-28 10:43:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:11,340 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-28 10:43:11,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:43:11,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-28 10:43:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:11,341 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:43:11,341 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:43:11,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:43:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:43:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:43:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-28 10:43:11,346 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-28 10:43:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:11,346 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-28 10:43:11,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:43:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-28 10:43:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:43:11,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:11,346 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-28 10:43:11,347 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:11,347 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-28 10:43:11,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:11,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:11,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:11,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:11,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:11,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:11,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:11,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:11,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:11,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:11,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:11,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:43:11,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:43:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:43:11,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:11,603 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-28 10:43:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:11,861 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-28 10:43:11,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:43:11,861 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-28 10:43:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:11,861 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:43:11,862 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:43:11,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:43:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:43:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:43:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-28 10:43:11,864 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-28 10:43:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:11,864 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-28 10:43:11,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:43:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-28 10:43:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:43:11,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:11,865 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-28 10:43:11,865 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:11,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-28 10:43:11,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:11,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:11,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:11,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:12,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:12,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:43:12,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:12,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:12,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:12,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:43:12,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:43:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:43:12,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:12,453 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-28 10:43:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:14,132 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-28 10:43:14,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:43:14,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-28 10:43:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:14,133 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:43:14,133 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:43:14,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:43:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-28 10:43:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:43:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-28 10:43:14,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-28 10:43:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:14,138 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-28 10:43:14,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:43:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-28 10:43:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:43:14,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:14,139 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-28 10:43:14,139 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:14,139 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:14,139 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-28 10:43:14,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:14,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:14,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:14,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:14,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:14,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:14,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:14,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:14,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:14,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:14,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:14,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:43:14,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:43:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:43:14,471 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:14,472 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-28 10:43:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:15,050 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-28 10:43:15,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:43:15,051 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-28 10:43:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:15,051 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:15,051 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:43:15,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:43:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:43:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:43:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-28 10:43:15,054 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-28 10:43:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:15,054 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-28 10:43:15,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:43:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-28 10:43:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:43:15,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:15,054 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-28 10:43:15,054 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:15,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:15,055 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-28 10:43:15,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:15,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:15,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:15,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:15,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:15,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:15,356 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 [2018-09-28 10:43:15,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:15,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:15,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:15,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:15,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:15,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:43:15,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:43:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:43:15,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:15,458 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-28 10:43:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:15,661 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-28 10:43:15,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:43:15,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-28 10:43:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:15,662 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:43:15,662 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:43:15,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:43:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:43:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:43:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-28 10:43:15,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-28 10:43:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:15,666 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-28 10:43:15,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:43:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-28 10:43:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:43:15,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:15,667 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-28 10:43:15,668 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:15,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:15,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-28 10:43:15,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:15,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:15,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:15,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:15,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:15,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:15,982 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 [2018-09-28 10:43:15,989 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:16,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:16,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:16,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:16,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:16,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:43:16,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:43:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:43:16,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:16,122 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-28 10:43:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:18,332 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-28 10:43:18,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:43:18,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-28 10:43:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:18,333 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:43:18,333 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:43:18,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:43:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-28 10:43:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:43:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-28 10:43:18,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-28 10:43:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:18,337 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-28 10:43:18,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:43:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-28 10:43:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:43:18,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:18,338 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-28 10:43:18,338 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:18,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:18,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-28 10:43:18,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:18,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:18,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:18,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:18,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:18,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:18,463 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 [2018-09-28 10:43:18,471 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:18,500 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:43:18,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:18,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:19,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:19,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:43:19,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:43:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:43:19,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:19,245 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-28 10:43:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:20,161 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-28 10:43:20,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:43:20,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-28 10:43:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:20,162 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:43:20,162 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:43:20,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:43:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:43:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:43:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-28 10:43:20,165 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-28 10:43:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:20,166 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-28 10:43:20,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:43:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-28 10:43:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:43:20,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:20,166 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-28 10:43:20,166 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:20,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:20,167 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-28 10:43:20,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:20,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:20,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:20,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:20,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:20,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:20,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:20,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:43:20,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:20,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:20,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:43:20,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:43:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:43:20,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:20,578 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-28 10:43:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:20,862 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-28 10:43:20,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:43:20,863 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-28 10:43:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:20,864 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:43:20,864 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:43:20,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:43:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:43:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:43:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-28 10:43:20,868 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-28 10:43:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:20,868 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-28 10:43:20,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:43:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-28 10:43:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:43:20,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:20,869 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-28 10:43:20,869 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:20,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:20,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-28 10:43:20,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:20,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:20,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:20,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:20,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:21,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:21,213 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 [2018-09-28 10:43:21,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:21,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:21,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:21,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:43:21,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:43:21,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:43:21,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:21,346 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-28 10:43:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:23,541 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-28 10:43:23,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:43:23,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-28 10:43:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:23,543 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:43:23,543 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:23,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-28 10:43:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:43:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-28 10:43:23,547 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-28 10:43:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:23,547 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-28 10:43:23,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:43:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-28 10:43:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:43:23,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:23,548 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-28 10:43:23,548 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:23,548 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-28 10:43:23,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:23,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:23,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:23,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:23,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:23,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:23,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:23,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:23,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:23,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:23,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:43:23,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:43:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:43:24,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:24,000 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-28 10:43:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:24,529 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-28 10:43:24,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:43:24,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-28 10:43:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:24,530 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:43:24,530 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:43:24,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:43:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:43:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:43:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-28 10:43:24,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-28 10:43:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:24,534 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-28 10:43:24,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:43:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-28 10:43:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:43:24,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:24,535 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-28 10:43:24,535 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:24,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-28 10:43:24,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:24,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:24,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:24,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:24,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:25,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:25,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:25,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:25,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:43:25,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:25,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:25,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:25,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:43:25,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:43:25,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:43:25,273 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:25,273 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-28 10:43:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:25,564 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-28 10:43:25,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:43:25,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-28 10:43:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:25,566 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:43:25,566 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:43:25,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:43:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:43:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:43:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-28 10:43:25,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-28 10:43:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:25,571 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-28 10:43:25,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:43:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-28 10:43:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:43:25,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:25,572 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-28 10:43:25,572 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:25,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-28 10:43:25,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:25,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:25,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:25,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:25,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:26,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:26,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:26,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:26,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:26,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:26,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:26,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:26,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:43:26,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:43:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:43:26,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:26,391 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-28 10:43:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:28,814 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-28 10:43:28,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:43:28,815 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-28 10:43:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:28,816 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:43:28,816 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:43:28,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:43:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-28 10:43:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:43:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-28 10:43:28,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-28 10:43:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:28,819 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-28 10:43:28,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:43:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-28 10:43:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:43:28,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:28,820 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-28 10:43:28,820 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:28,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-28 10:43:28,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:28,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:28,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:28,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:28,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:29,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:29,721 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 [2018-09-28 10:43:29,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:29,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-28 10:43:29,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:29,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:29,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:29,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:43:29,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:43:29,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:43:29,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:29,836 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-28 10:43:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:30,427 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-28 10:43:30,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:43:30,428 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-28 10:43:30,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:30,428 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:43:30,429 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:43:30,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:43:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:43:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:43:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-28 10:43:30,432 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-28 10:43:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:30,432 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-28 10:43:30,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:43:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-28 10:43:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:43:30,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:30,433 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-28 10:43:30,433 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:30,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-28 10:43:30,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:30,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:30,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:30,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:30,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:30,783 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 [2018-09-28 10:43:30,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:30,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-28 10:43:30,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:30,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:31,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:31,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:43:31,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:43:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:43:31,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:31,013 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-28 10:43:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:31,287 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-28 10:43:31,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:43:31,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-28 10:43:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:31,288 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:43:31,289 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:43:31,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:43:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:43:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:43:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-28 10:43:31,291 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-28 10:43:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:31,291 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-28 10:43:31,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:43:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-28 10:43:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:43:31,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:31,292 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-28 10:43:31,292 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:31,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-28 10:43:31,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:31,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:31,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:31,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:31,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:32,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:32,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:32,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:32,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:32,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:32,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:43:32,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:43:32,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:43:32,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:32,473 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-28 10:43:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:35,065 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-28 10:43:35,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:43:35,066 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-28 10:43:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:35,066 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:43:35,067 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:43:35,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:43:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-28 10:43:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:43:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-28 10:43:35,071 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-28 10:43:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:35,071 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-28 10:43:35,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:43:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-28 10:43:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:43:35,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:35,071 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-28 10:43:35,071 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:35,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-28 10:43:35,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:35,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:35,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:35,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:35,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:35,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:35,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:35,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:35,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:35,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:35,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:43:35,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:43:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:43:35,400 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:35,400 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-28 10:43:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:36,038 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-28 10:43:36,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:43:36,038 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-28 10:43:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:36,039 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:43:36,039 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:43:36,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:43:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:43:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:43:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-28 10:43:36,043 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-28 10:43:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:36,044 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-28 10:43:36,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:43:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-28 10:43:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:43:36,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:36,044 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-28 10:43:36,045 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:36,045 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-28 10:43:36,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:36,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:36,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:36,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:36,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:36,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:36,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:36,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:36,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-28 10:43:36,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:36,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:36,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:36,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:43:36,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:43:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:43:36,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:36,368 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-28 10:43:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:36,678 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-28 10:43:36,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:43:36,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-28 10:43:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:36,679 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:36,679 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:43:36,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:43:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:43:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:43:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-28 10:43:36,683 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-28 10:43:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:36,684 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-28 10:43:36,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:43:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-28 10:43:36,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:43:36,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:36,684 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-28 10:43:36,684 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:36,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:36,685 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-28 10:43:36,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:36,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:36,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:36,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:36,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:37,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:37,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:37,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:37,327 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:37,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:37,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:37,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:37,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:43:37,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:43:37,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:43:37,457 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:37,457 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-28 10:43:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:40,387 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-28 10:43:40,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:43:40,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-28 10:43:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:40,388 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:43:40,388 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:43:40,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:43:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-28 10:43:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:43:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-28 10:43:40,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-28 10:43:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:40,392 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-28 10:43:40,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:43:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-28 10:43:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:43:40,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:40,393 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-28 10:43:40,393 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:40,393 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:40,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-28 10:43:40,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:40,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:40,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:40,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:40,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:40,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:40,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:40,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:40,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:43:40,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:40,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:40,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:40,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:43:40,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:43:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:43:40,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:40,787 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-28 10:43:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:41,404 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-28 10:43:41,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:43:41,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-28 10:43:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:41,405 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:43:41,405 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:41,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:43:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:43:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-28 10:43:41,410 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-28 10:43:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:41,410 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-28 10:43:41,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:43:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-28 10:43:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:43:41,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:41,411 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-28 10:43:41,411 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:41,411 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:41,411 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-28 10:43:41,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:41,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:41,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:41,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:41,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:41,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:41,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:41,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:41,963 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-28 10:43:41,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:41,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:42,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:42,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:43:42,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:43:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:43:42,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:42,239 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-28 10:43:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:42,566 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-28 10:43:42,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:43:42,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-28 10:43:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:42,568 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:43:42,568 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:43:42,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:43:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:43:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:43:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-28 10:43:42,572 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-28 10:43:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:42,572 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-28 10:43:42,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:43:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-28 10:43:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:43:42,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:42,572 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-28 10:43:42,572 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:42,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-28 10:43:42,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:42,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:42,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:42,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:42,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:43,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:43,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:43,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:43,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:43,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:43,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:43:43,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:43:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:43:43,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:43,801 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-28 10:43:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:46,907 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-28 10:43:46,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:43:46,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-28 10:43:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:46,909 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:43:46,909 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:43:46,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:43:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-28 10:43:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:43:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-28 10:43:46,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-28 10:43:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:46,913 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-28 10:43:46,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:43:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-28 10:43:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:43:46,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:46,914 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-28 10:43:46,914 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:46,914 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-28 10:43:46,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:46,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:46,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:46,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:46,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:47,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:47,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:47,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:47,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:47,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:47,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:47,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:47,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:43:47,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:43:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:43:47,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:47,216 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-28 10:43:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:48,003 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-28 10:43:48,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:43:48,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-28 10:43:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:48,004 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:43:48,004 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:43:48,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:43:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:43:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:43:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-28 10:43:48,009 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-28 10:43:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:48,009 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-28 10:43:48,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:43:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-28 10:43:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:43:48,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:48,010 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-28 10:43:48,010 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:48,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-28 10:43:48,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:48,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:48,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:48,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:48,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:48,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:48,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:48,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:48,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:43:48,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:48,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:49,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:49,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:43:49,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:43:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:43:49,048 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:49,049 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-28 10:43:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:49,353 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-28 10:43:49,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:43:49,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-28 10:43:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:49,354 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:43:49,354 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:43:49,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:43:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:43:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:43:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-28 10:43:49,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-28 10:43:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:49,359 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-28 10:43:49,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:43:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-28 10:43:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:43:49,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:49,359 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-28 10:43:49,359 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:49,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:49,360 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-28 10:43:49,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:49,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:49,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:49,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:49,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:50,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:50,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:50,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:50,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:50,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:50,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:50,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:50,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:43:50,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:43:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:43:50,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:50,298 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-28 10:43:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:53,672 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-28 10:43:53,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:43:53,672 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-28 10:43:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:53,673 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:43:53,673 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:43:53,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:43:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-28 10:43:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:43:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-28 10:43:53,677 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-28 10:43:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:53,677 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-28 10:43:53,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:43:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-28 10:43:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:43:53,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:53,678 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-28 10:43:53,678 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:53,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:53,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-28 10:43:53,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:53,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:53,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:53,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:53,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:53,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:53,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:53,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:53,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:43:53,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:53,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:53,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:53,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:43:53,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:43:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:43:53,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:53,939 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-28 10:43:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:54,743 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-28 10:43:54,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:43:54,744 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-28 10:43:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:54,744 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:43:54,745 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:43:54,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:43:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:43:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:43:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-28 10:43:54,749 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-28 10:43:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:54,749 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-28 10:43:54,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:43:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-28 10:43:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:43:54,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:54,749 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-28 10:43:54,750 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:54,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-28 10:43:54,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:54,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:54,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:54,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:54,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:54,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:54,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:54,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:54,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:43:54,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:54,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:55,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:55,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:43:55,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:43:55,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:43:55,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:55,063 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-28 10:43:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:55,474 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-28 10:43:55,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:43:55,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-28 10:43:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:55,475 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:43:55,476 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:43:55,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:43:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:43:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:43:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-28 10:43:55,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-28 10:43:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:55,479 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-28 10:43:55,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:43:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-28 10:43:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:43:55,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:55,480 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-28 10:43:55,480 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:55,480 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-28 10:43:55,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:55,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:55,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:55,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:55,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:56,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:56,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:56,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:56,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:56,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:56,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:43:56,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:43:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:43:56,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:56,265 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-28 10:43:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:59,956 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-28 10:43:59,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:43:59,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-28 10:43:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:59,958 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:43:59,958 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:43:59,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:43:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-28 10:43:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:43:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-28 10:43:59,961 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-28 10:43:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:59,961 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-28 10:43:59,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:43:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-28 10:43:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:43:59,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:59,962 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-28 10:43:59,962 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:59,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-28 10:43:59,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:59,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:59,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:59,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:59,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:00,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:00,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:00,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:00,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:00,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:00,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:00,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:00,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:44:00,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:44:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:44:00,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:00,368 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-28 10:44:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:01,292 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-28 10:44:01,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:44:01,293 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-28 10:44:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:01,294 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:44:01,294 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:44:01,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:44:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:44:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:44:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-28 10:44:01,298 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-28 10:44:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:01,298 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-28 10:44:01,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:44:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-28 10:44:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:44:01,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:01,299 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-28 10:44:01,299 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:01,299 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-28 10:44:01,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:01,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:01,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:01,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:01,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:01,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:01,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:01,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:01,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-28 10:44:01,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:01,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:01,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:01,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:44:01,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:44:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:44:01,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:01,673 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-28 10:44:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:01,975 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-28 10:44:01,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:44:01,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-28 10:44:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:01,978 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:44:01,978 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:44:01,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:44:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:44:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:44:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-28 10:44:01,981 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-28 10:44:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:01,981 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-28 10:44:01,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:44:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-28 10:44:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:44:01,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:01,981 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-28 10:44:01,982 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:01,982 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-28 10:44:01,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:01,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:01,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:01,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:01,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:02,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:02,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:02,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:02,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:02,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:02,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:02,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:02,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:44:02,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:44:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:44:02,774 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:02,774 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-28 10:44:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:06,770 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-28 10:44:06,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:44:06,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-28 10:44:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:06,771 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:44:06,771 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:44:06,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:44:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-28 10:44:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:44:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-28 10:44:06,776 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-28 10:44:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:06,777 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-28 10:44:06,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:44:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-28 10:44:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:44:06,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:06,777 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-28 10:44:06,778 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:06,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-28 10:44:06,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:06,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:06,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:06,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:06,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:07,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:07,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:07,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:07,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-28 10:44:07,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:07,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:07,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:07,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:44:07,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:44:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:44:07,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:07,257 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-28 10:44:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:08,233 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-28 10:44:08,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:44:08,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-28 10:44:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:08,234 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:44:08,234 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:44:08,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:44:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:44:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:44:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-28 10:44:08,238 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-28 10:44:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:08,239 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-28 10:44:08,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:44:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-28 10:44:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:44:08,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:08,239 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-28 10:44:08,240 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:08,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:08,240 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-28 10:44:08,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:08,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:08,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:08,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:08,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:08,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:08,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:08,688 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:08,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-28 10:44:08,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:08,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:08,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:08,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:44:08,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:44:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:44:08,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:08,980 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-28 10:44:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:09,354 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-28 10:44:09,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:44:09,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-28 10:44:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:09,355 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:44:09,356 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:44:09,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:44:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:44:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:44:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-28 10:44:09,360 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-28 10:44:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:09,360 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-28 10:44:09,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:44:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-28 10:44:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:44:09,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:09,361 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-28 10:44:09,361 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:09,361 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-28 10:44:09,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:09,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:09,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:09,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:09,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:09,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:09,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:09,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:09,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:10,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:10,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:44:10,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:44:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:44:10,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:10,055 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-28 10:44:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:14,353 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-28 10:44:14,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:44:14,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-28 10:44:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:14,354 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:44:14,355 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:44:14,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:44:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-28 10:44:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:44:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-28 10:44:14,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-28 10:44:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:14,360 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-28 10:44:14,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:44:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-28 10:44:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:44:14,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:14,360 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-28 10:44:14,360 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:14,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-28 10:44:14,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:14,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:14,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:14,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:14,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:15,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:15,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:15,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:15,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:15,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:15,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:15,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:15,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:44:15,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:44:15,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:44:15,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:15,408 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-28 10:44:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:16,480 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-28 10:44:16,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:44:16,481 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-28 10:44:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:16,481 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:44:16,481 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:44:16,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:44:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:44:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:44:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-28 10:44:16,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-28 10:44:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:16,487 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-28 10:44:16,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:44:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-28 10:44:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:44:16,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:16,487 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-28 10:44:16,488 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:16,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-28 10:44:16,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:16,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:16,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:16,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:16,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:16,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:16,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:16,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:16,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-28 10:44:16,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:16,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:16,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:16,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:44:16,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:44:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:44:16,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:16,958 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-28 10:44:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:17,936 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-28 10:44:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:44:17,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-28 10:44:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:17,938 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:44:17,938 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:44:17,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:44:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:44:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:44:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-28 10:44:17,942 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-28 10:44:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:17,943 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-28 10:44:17,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:44:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-28 10:44:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:44:17,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:17,943 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-28 10:44:17,943 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:17,943 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-28 10:44:17,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:17,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:17,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:17,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:17,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:19,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:19,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:19,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:19,381 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:19,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:19,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:20,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:20,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:44:20,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:44:20,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:44:20,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:20,772 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-28 10:44:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:25,404 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-28 10:44:25,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:44:25,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-28 10:44:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:25,406 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:44:25,406 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:44:25,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:44:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-28 10:44:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:44:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-28 10:44:25,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-28 10:44:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:25,412 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-28 10:44:25,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:44:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-28 10:44:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:44:25,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:25,412 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-28 10:44:25,413 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:25,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-28 10:44:25,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:25,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:25,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:25,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:25,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:25,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:25,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:25,850 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:25,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-28 10:44:25,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:25,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:26,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:26,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:44:26,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:44:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:44:26,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:26,009 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-28 10:44:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:26,782 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-28 10:44:26,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:44:26,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-28 10:44:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:26,784 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:44:26,784 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:44:26,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:44:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:44:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:44:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-28 10:44:26,789 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-28 10:44:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:26,789 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-28 10:44:26,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:44:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-28 10:44:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:44:26,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:26,790 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-28 10:44:26,790 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:26,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-28 10:44:26,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:26,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:26,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:26,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:26,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:27,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:27,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:27,818 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:27,855 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-28 10:44:27,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:27,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:27,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:27,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:44:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:44:27,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:44:27,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:27,964 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-28 10:44:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:28,317 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-28 10:44:28,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:44:28,318 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-28 10:44:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:28,318 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:44:28,319 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:44:28,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:44:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:44:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:44:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-28 10:44:28,324 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-28 10:44:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:28,324 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-28 10:44:28,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:44:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-28 10:44:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:44:28,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:28,325 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-28 10:44:28,325 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:28,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-28 10:44:28,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:28,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:28,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:28,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:28,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:29,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:29,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:29,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:29,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:29,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:29,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:44:29,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:44:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:44:29,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:29,721 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-28 10:44:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:34,803 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-28 10:44:34,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:44:34,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-28 10:44:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:34,804 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:44:34,804 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:44:34,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:44:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-28 10:44:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:44:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-28 10:44:34,808 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-28 10:44:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:34,809 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-28 10:44:34,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:44:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-28 10:44:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:44:34,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:34,809 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-28 10:44:34,809 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:34,809 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-28 10:44:34,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:34,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:34,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:34,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:34,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:35,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:35,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:35,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:35,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:35,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:44:35,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:44:35,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:44:35,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:35,194 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-28 10:44:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:36,486 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-28 10:44:36,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:44:36,487 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-28 10:44:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:36,487 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:44:36,488 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:44:36,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:44:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:44:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:44:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-28 10:44:36,493 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-28 10:44:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:36,493 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-28 10:44:36,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:44:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-28 10:44:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:44:36,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:36,494 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-28 10:44:36,494 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:36,494 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:36,494 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-28 10:44:36,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:36,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:36,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:36,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:36,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:36,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:36,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:36,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:36,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:44:36,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:36,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:36,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:36,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:44:36,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:44:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:44:36,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:36,990 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-28 10:44:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:37,401 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-28 10:44:37,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:44:37,402 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-28 10:44:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:37,402 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:44:37,402 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:44:37,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:44:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:44:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:44:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-28 10:44:37,407 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-28 10:44:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:37,407 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-28 10:44:37,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:44:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-28 10:44:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:44:37,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:37,408 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-28 10:44:37,408 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:37,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-28 10:44:37,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:37,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:37,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:37,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:37,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:37,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:37,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:38,003 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:38,045 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:38,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:38,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:38,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:38,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:44:38,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:44:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:44:38,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:38,214 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-28 10:44:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:43,538 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-28 10:44:43,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:44:43,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-28 10:44:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:43,540 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:44:43,540 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:44:43,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:44:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-28 10:44:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:44:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-28 10:44:43,550 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-28 10:44:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:43,550 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-28 10:44:43,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:44:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-28 10:44:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:44:43,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:43,551 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-28 10:44:43,551 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:43,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:43,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-28 10:44:43,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:43,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:43,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:43,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:43,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:44,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:44,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:44,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:44,373 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:44:44,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:44,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:44,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:44,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:44:44,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:44:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:44:44,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:44,531 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-28 10:44:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:45,372 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-28 10:44:45,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:44:45,373 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-28 10:44:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:45,374 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:44:45,374 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:44:45,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:44:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:44:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:44:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-28 10:44:45,379 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-28 10:44:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:45,379 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-28 10:44:45,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:44:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-28 10:44:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:44:45,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:45,380 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-28 10:44:45,380 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:45,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:45,380 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-28 10:44:45,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:45,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:45,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:45,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:45,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:45,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:45,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:45,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:45,765 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:44:45,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:45,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:45,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:45,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:44:45,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:44:45,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:44:45,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:45,877 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-28 10:44:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:46,241 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-28 10:44:46,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:44:46,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-28 10:44:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:46,242 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:44:46,242 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:44:46,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:44:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:44:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:44:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-28 10:44:46,247 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-28 10:44:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:46,247 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-28 10:44:46,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:44:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-28 10:44:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:44:46,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:46,248 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-28 10:44:46,248 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:46,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-28 10:44:46,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:46,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:46,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:46,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:46,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:46,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:46,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:46,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:46,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:47,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:47,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:44:47,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:44:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:44:47,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:47,097 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-28 10:44:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:52,818 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-28 10:44:52,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:44:52,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-28 10:44:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:52,819 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:44:52,819 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:44:52,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:44:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-28 10:44:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:44:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-28 10:44:52,824 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-28 10:44:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:52,824 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-28 10:44:52,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:44:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-28 10:44:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:44:52,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:52,825 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-28 10:44:52,825 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:52,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-28 10:44:52,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:52,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:52,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:52,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:52,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:53,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:53,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:53,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:53,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:53,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:53,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:53,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:53,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:44:53,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:44:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:44:53,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:53,405 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-28 10:44:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:54,792 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-28 10:44:54,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:44:54,792 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-28 10:44:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:54,793 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:44:54,793 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:44:54,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:44:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:44:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:44:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-28 10:44:54,798 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-28 10:44:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:54,799 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-28 10:44:54,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:44:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-28 10:44:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:44:54,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:54,799 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-28 10:44:54,799 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:54,800 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-28 10:44:54,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:54,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:54,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:54,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:54,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:55,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:55,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:55,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:55,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:44:55,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:55,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:55,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:55,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:44:55,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:44:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:44:55,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:55,205 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-28 10:44:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:55,590 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-28 10:44:55,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:44:55,591 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-28 10:44:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:55,591 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:44:55,592 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:44:55,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:44:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:44:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:44:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-28 10:44:55,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-28 10:44:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:55,596 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-28 10:44:55,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:44:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-28 10:44:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:44:55,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:55,597 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-28 10:44:55,597 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:55,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-28 10:44:55,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:55,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:55,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:55,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:55,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:56,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:56,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:56,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:56,296 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:56,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:56,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:56,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:56,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:44:56,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:44:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:44:56,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:56,425 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-28 10:45:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:02,499 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-28 10:45:02,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:45:02,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-28 10:45:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:02,501 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:45:02,501 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:45:02,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:45:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-28 10:45:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:45:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-28 10:45:02,506 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-28 10:45:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:02,507 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-28 10:45:02,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:45:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-28 10:45:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:45:02,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:02,508 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-28 10:45:02,508 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:02,508 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-28 10:45:02,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:02,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:02,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:03,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:03,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:03,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:45:03,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-28 10:45:03,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:03,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:03,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:03,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:45:03,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:45:03,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:45:03,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:03,301 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-28 10:45:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:04,863 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-28 10:45:04,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:45:04,864 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-28 10:45:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:04,864 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:45:04,864 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:45:04,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:45:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:45:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:45:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-28 10:45:04,870 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-28 10:45:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:04,870 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-28 10:45:04,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:45:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-28 10:45:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:45:04,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:04,871 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-28 10:45:04,871 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:04,871 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-28 10:45:04,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:04,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:04,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:04,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:04,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:05,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:05,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:05,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:45:05,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-28 10:45:05,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:05,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:05,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:05,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:45:05,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:45:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:45:05,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:05,292 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-28 10:45:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:05,682 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-28 10:45:05,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:45:05,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-28 10:45:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:05,683 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:45:05,683 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:45:05,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:45:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:45:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:45:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-28 10:45:05,687 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-28 10:45:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:05,687 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-28 10:45:05,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:45:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-28 10:45:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:45:05,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:05,687 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-28 10:45:05,687 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:05,688 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-28 10:45:05,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:05,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:05,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:05,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:05,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:06,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:06,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:06,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:06,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:06,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:06,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:45:06,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:45:06,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:45:06,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:06,682 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-28 10:45:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:13,165 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-28 10:45:13,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:45:13,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-28 10:45:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:13,166 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:45:13,166 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:45:13,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:45:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-28 10:45:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:45:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-28 10:45:13,171 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-28 10:45:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:13,171 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-28 10:45:13,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:45:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-28 10:45:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:45:13,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:13,172 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-28 10:45:13,172 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:13,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:13,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-28 10:45:13,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:13,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:13,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:13,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:13,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:13,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:13,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:13,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:45:13,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:45:13,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:13,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:13,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:13,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:45:13,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:45:13,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:45:13,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:13,975 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-28 10:45:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:15,434 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-28 10:45:15,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:45:15,435 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-28 10:45:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:15,436 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:45:15,436 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:45:15,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:45:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:45:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:45:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-28 10:45:15,441 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-28 10:45:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:15,441 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-28 10:45:15,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:45:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-28 10:45:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:45:15,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:15,442 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-28 10:45:15,442 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:15,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-28 10:45:15,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:15,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:15,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:15,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:15,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:15,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:15,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:15,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:45:15,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-28 10:45:15,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:15,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:15,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:15,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:45:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:45:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:45:15,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:15,911 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-28 10:45:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:16,313 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-28 10:45:16,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:45:16,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-28 10:45:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:16,314 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:45:16,314 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:45:16,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:45:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:45:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:45:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-28 10:45:16,319 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-28 10:45:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:16,319 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-28 10:45:16,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:45:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-28 10:45:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:45:16,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:16,320 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-28 10:45:16,321 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:16,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-28 10:45:16,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:16,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:16,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:16,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:16,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:17,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:17,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:17,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:45:17,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:45:17,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:17,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:17,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:17,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:45:17,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:45:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:45:17,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:17,387 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-28 10:45:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:24,247 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-28 10:45:24,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:45:24,247 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-28 10:45:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:24,248 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:45:24,249 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:45:24,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:45:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-28 10:45:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:45:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-28 10:45:24,254 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-28 10:45:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:24,254 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-28 10:45:24,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:45:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-28 10:45:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:45:24,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:24,255 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-28 10:45:24,255 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:24,255 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-28 10:45:24,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:24,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:24,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:24,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:24,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:24,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:24,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:24,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:45:24,506 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:45:24,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:24,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:24,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:24,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:45:24,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:45:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:45:24,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:24,645 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-28 10:45:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:26,233 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-28 10:45:26,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:45:26,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-28 10:45:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:26,234 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:45:26,234 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:45:26,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:45:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:45:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:45:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-28 10:45:26,238 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-28 10:45:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:26,238 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-28 10:45:26,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:45:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-28 10:45:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:45:26,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:26,239 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-28 10:45:26,239 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:26,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:26,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-28 10:45:26,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:26,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:26,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:26,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:26,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:26,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:26,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:26,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:45:26,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-28 10:45:26,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:26,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:26,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:26,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:45:26,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:45:26,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:45:26,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:26,842 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-28 10:45:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:27,257 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-28 10:45:27,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:45:27,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-28 10:45:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:27,258 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:45:27,258 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:45:27,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:45:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:45:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:45:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-28 10:45:27,263 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-28 10:45:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:27,263 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-28 10:45:27,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:45:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-28 10:45:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:45:27,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:27,263 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-28 10:45:27,264 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:27,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-28 10:45:27,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:27,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:27,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:27,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:27,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:28,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:28,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:28,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:28,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:28,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:28,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:45:28,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:45:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:45:28,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:28,222 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-28 10:45:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:35,523 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-28 10:45:35,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:45:35,524 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-28 10:45:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:35,525 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:45:35,525 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:45:35,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:45:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-28 10:45:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:45:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-28 10:45:35,529 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-28 10:45:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:35,529 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-28 10:45:35,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:45:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-28 10:45:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:45:35,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:35,530 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-28 10:45:35,530 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:35,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-28 10:45:35,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:35,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:35,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:35,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:35,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:35,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:35,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:35,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:45:35,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:45:35,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:35,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:36,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:36,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:45:36,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:45:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:45:36,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:36,222 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-28 10:45:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:37,903 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-28 10:45:37,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:45:37,903 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-28 10:45:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:37,904 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:45:37,904 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:45:37,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:45:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:45:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:45:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-28 10:45:37,907 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-28 10:45:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:37,907 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-28 10:45:37,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:45:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-28 10:45:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:45:37,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:37,908 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-28 10:45:37,908 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:37,909 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-28 10:45:37,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:37,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:37,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:37,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:37,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:38,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:38,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:38,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:45:38,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:45:38,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:38,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:38,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:38,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:45:38,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:45:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:45:38,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:38,456 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-28 10:45:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:38,886 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-28 10:45:38,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:45:38,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-28 10:45:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:38,887 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:45:38,887 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:45:38,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:45:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:45:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:45:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-28 10:45:38,893 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-28 10:45:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:38,893 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-28 10:45:38,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:45:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-28 10:45:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:45:38,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:38,893 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-28 10:45:38,893 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:38,893 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-28 10:45:38,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:38,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:38,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:38,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:38,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:39,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:39,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:39,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:45:39,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:45:39,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:39,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:39,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:39,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:45:39,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:45:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:45:39,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:39,901 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-28 10:45:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:47,607 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-28 10:45:47,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:45:47,607 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-28 10:45:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:47,608 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:45:47,608 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:45:47,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:45:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-28 10:45:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:45:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-28 10:45:47,613 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-28 10:45:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:47,614 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-28 10:45:47,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:45:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-28 10:45:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:45:47,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:47,614 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-28 10:45:47,614 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:47,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-28 10:45:47,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:47,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:47,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:47,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:47,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:47,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:47,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:47,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:45:47,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:45:47,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:47,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:48,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:48,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:45:48,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:45:48,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:45:48,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:48,330 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-28 10:45:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:50,201 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-28 10:45:50,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:45:50,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-28 10:45:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:50,202 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:45:50,202 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:45:50,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:45:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:45:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:45:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-28 10:45:50,208 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-28 10:45:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:50,208 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-28 10:45:50,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:45:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-28 10:45:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:45:50,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:50,209 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-28 10:45:50,209 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:50,209 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-28 10:45:50,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:50,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:50,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:50,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:50,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:50,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:50,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:50,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:45:50,688 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:45:50,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:50,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:50,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:50,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:45:50,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:45:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:45:50,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:50,838 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-28 10:45:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:51,356 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-28 10:45:51,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:45:51,357 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-28 10:45:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:51,358 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:45:51,358 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:45:51,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:45:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:45:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:45:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-28 10:45:51,364 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-28 10:45:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:51,364 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-28 10:45:51,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:45:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-28 10:45:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:45:51,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:51,365 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-28 10:45:51,365 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:45:51,365 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-28 10:45:51,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:51,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:51,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:52,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:45:52,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:45:52,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:52,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:52,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:45:52,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:45:52,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:45:52,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:45:52,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:52,713 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-28 10:46:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:00,864 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-28 10:46:00,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:46:00,865 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-28 10:46:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:00,866 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:46:00,866 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:46:00,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:46:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-28 10:46:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:46:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-28 10:46:00,872 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-28 10:46:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:00,873 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-28 10:46:00,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:46:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-28 10:46:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:46:00,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:00,873 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-28 10:46:00,873 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:00,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-28 10:46:00,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:00,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:00,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:00,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:46:00,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:01,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:01,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:01,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:46:01,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:46:01,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:01,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:01,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:01,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:46:01,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:46:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:46:01,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:01,346 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-28 10:46:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:03,325 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-28 10:46:03,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:46:03,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-28 10:46:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:03,326 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:46:03,326 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:46:03,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:46:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:46:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:46:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-28 10:46:03,332 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-28 10:46:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:03,332 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-28 10:46:03,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:46:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-28 10:46:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:46:03,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:03,332 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-28 10:46:03,332 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:03,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-28 10:46:03,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:03,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:03,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:03,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:03,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:03,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:03,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:03,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:46:03,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-28 10:46:03,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:03,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:03,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:03,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:46:03,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:46:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:46:03,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:03,829 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-28 10:46:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:04,294 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-28 10:46:04,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:46:04,294 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-28 10:46:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:04,295 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:46:04,295 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:46:04,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:46:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:46:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:46:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-28 10:46:04,300 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-28 10:46:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:04,300 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-28 10:46:04,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:46:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-28 10:46:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:46:04,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:04,301 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-28 10:46:04,301 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:04,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-28 10:46:04,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:04,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:04,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:04,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:04,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:05,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:05,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:05,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:46:05,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:46:05,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:05,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:05,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:05,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:46:05,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:46:05,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:46:05,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:05,808 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-28 10:46:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:14,431 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-28 10:46:14,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:46:14,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-28 10:46:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:14,432 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:46:14,432 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:46:14,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:46:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-28 10:46:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:46:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-28 10:46:14,437 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-28 10:46:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:14,438 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-28 10:46:14,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:46:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-28 10:46:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:46:14,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:14,438 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-28 10:46:14,438 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:14,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-28 10:46:14,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:14,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:14,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:14,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:14,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:14,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:14,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:14,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:46:15,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-28 10:46:15,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:15,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:15,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:15,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:46:15,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:46:15,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:46:15,195 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:15,195 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-28 10:46:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:17,290 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-28 10:46:17,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:46:17,290 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-28 10:46:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:17,291 INFO L225 Difference]: With dead ends: 120 [2018-09-28 10:46:17,291 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:46:17,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:46:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:46:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:46:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-28 10:46:17,295 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-28 10:46:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:17,295 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-28 10:46:17,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:46:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-28 10:46:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:46:17,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:17,296 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-28 10:46:17,296 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:17,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-28 10:46:17,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:17,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:17,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:17,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:17,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:17,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:17,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:17,580 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:46:17,631 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-28 10:46:17,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:17,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:17,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:17,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:46:17,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:46:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:46:17,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:17,782 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-28 10:46:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:18,243 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-28 10:46:18,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:46:18,243 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-28 10:46:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:18,244 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:46:18,244 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:46:18,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:46:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:46:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:46:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-28 10:46:18,249 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-28 10:46:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:18,250 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-28 10:46:18,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:46:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-28 10:46:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:46:18,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:18,250 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-28 10:46:18,250 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:18,250 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-28 10:46:18,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:18,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:18,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:18,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:18,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:19,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:19,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:19,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:46:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:19,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:19,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:19,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:46:19,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:46:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:46:19,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:19,390 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-28 10:46:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:28,458 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-28 10:46:28,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:46:28,459 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-28 10:46:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:28,459 INFO L225 Difference]: With dead ends: 122 [2018-09-28 10:46:28,460 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:46:28,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:46:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-28 10:46:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:46:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-28 10:46:28,466 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-28 10:46:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:28,467 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-28 10:46:28,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:46:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-28 10:46:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:46:28,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:28,467 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-28 10:46:28,468 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:28,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-28 10:46:28,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:28,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:28,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:28,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:46:28,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:28,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:28,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:28,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:46:28,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:46:28,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:28,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:28,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:28,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:46:28,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:46:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:46:28,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:28,882 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-28 10:46:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:30,647 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-28 10:46:30,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:46:30,647 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-28 10:46:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:30,648 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:46:30,648 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:46:30,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:46:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:46:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:46:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-28 10:46:30,652 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-28 10:46:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:30,653 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-28 10:46:30,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:46:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-28 10:46:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:46:30,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:30,653 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-28 10:46:30,653 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:30,653 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-28 10:46:30,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:30,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:30,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:30,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:30,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:30,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:30,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:30,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:46:31,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-28 10:46:31,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:31,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:31,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:31,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:46:31,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:46:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:46:31,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:31,152 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-28 10:46:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:31,636 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-28 10:46:31,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:46:31,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-28 10:46:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:31,637 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:46:31,637 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:46:31,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:46:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:46:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:46:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-28 10:46:31,643 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-28 10:46:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:31,644 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-28 10:46:31,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:46:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-28 10:46:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:46:31,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:31,644 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-28 10:46:31,644 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:46:31,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-28 10:46:31,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:31,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:31,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:31,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:31,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:46:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:32,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:46:32,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:46:32,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:46:32,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:46:32,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:32,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:32,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:46:32,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:46:32,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:46:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:46:32,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:32,824 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. Received shutdown request... [2018-09-28 10:46:35,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:46:35,297 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:46:35,304 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:46:35,304 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:46:35 BoogieIcfgContainer [2018-09-28 10:46:35,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:46:35,305 INFO L168 Benchmark]: Toolchain (without parser) took 235428.14 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 291.6 MB). Peak memory consumption was 178.3 MB. Max. memory is 7.1 GB. [2018-09-28 10:46:35,307 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:46:35,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:46:35,308 INFO L168 Benchmark]: Boogie Preprocessor took 19.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:46:35,308 INFO L168 Benchmark]: RCFGBuilder took 352.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:46:35,309 INFO L168 Benchmark]: TraceAbstraction took 235004.79 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 270.5 MB). Peak memory consumption was 157.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:46:35,311 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 352.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235004.79 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 270.5 MB). Peak memory consumption was 157.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (82states) and FLOYD_HOARE automaton (currently 23 states, 41 states before enhancement), while ReachableStatesComputation was computing reachable states (21 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (82states) and FLOYD_HOARE automaton (currently 23 states, 41 states before enhancement), while ReachableStatesComputation was computing reachable states (21 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 234.9s OverallTime, 115 OverallIterations, 38 TraceHistogramMax, 169.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 460 SDtfs, 840 SDslu, 2936 SDs, 0 SdLazy, 52665 SolverSat, 968 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9375 GetRequests, 6962 SyntacticMatches, 76 SemanticMatches, 2337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 114 MinimizatonAttempts, 703 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 56.6s InterpolantComputationTime, 9871 NumberOfCodeBlocks, 9871 NumberOfCodeBlocksAsserted, 814 NumberOfCheckSat, 9644 ConstructedInterpolants, 0 QuantifiedInterpolants, 2245002 SizeOfPredicates, 74 NumberOfNonLiveVariables, 21000 ConjunctsInSsa, 6112 ConjunctsInUnsatCore, 227 InterpolantComputations, 3 PerfectInterpolantSequences, 39517/115593 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-46-35-321.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-46-35-321.csv Completed graceful shutdown