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 0.1.23-00a8621 [2018-09-30 11:01:20,500 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 11:01:20,502 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 11:01:20,521 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 11:01:20,521 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 11:01:20,523 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 11:01:20,525 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 11:01:20,527 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 11:01:20,529 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 11:01:20,531 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 11:01:20,534 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 11:01:20,585 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 [2018-09-30 11:01:20,611 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 11:01:20,611 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 11:01:20,613 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 11:01:20,613 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 11:01:20,614 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 11:01:20,614 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 11:01:20,614 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 11:01:20,614 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 11:01:20,615 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 11:01:20,615 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 11:01:20,615 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 11:01:20,615 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 11:01:20,615 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 11:01:20,615 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 11:01:20,616 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 11:01:20,616 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 11:01:20,616 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 11:01:20,616 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 11:01:20,617 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 11:01:20,618 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 11:01:20,618 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 11:01:20,618 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 11:01:20,618 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 11:01:20,618 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 11:01:20,619 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 11:01:20,619 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 11:01:20,619 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 11:01:20,619 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 11:01:20,619 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 11:01:20,620 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 11:01:20,620 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 11:01:20,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 11:01:20,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 11:01:20,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 11:01:20,709 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 11:01:20,709 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 11:01:20,710 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-30 11:01:20,711 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-30 11:01:20,764 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 11:01:20,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 11:01:20,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 11:01:20,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 11:01:20,769 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 11:01:20,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,810 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 11:01:20,810 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 11:01:20,810 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 11:01:20,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 11:01:20,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 11:01:20,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 11:01:20,814 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 11:01:20,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... [2018-09-30 11:01:20,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 11:01:20,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 11:01:20,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 11:01:20,835 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 11:01:20,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 11:01:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-30 11:01:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-30 11:01:21,073 INFO L345 CfgBuilder]: Using library mode [2018-09-30 11:01:21,074 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:01:21 BoogieIcfgContainer [2018-09-30 11:01:21,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 11:01:21,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 11:01:21,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 11:01:21,078 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 11:01:21,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:01:20" (1/2) ... [2018-09-30 11:01:21,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3d52b5 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:01:21, skipping insertion in model container [2018-09-30 11:01:21,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:01:21" (2/2) ... [2018-09-30 11:01:21,082 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-30 11:01:21,091 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 11:01:21,099 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-30 11:01:21,152 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 11:01:21,153 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 11:01:21,153 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 11:01:21,154 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 11:01:21,154 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 11:01:21,154 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 11:01:21,154 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 11:01:21,154 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 11:01:21,155 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 11:01:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 11:01:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 11:01:21,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:21,188 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 11:01:21,190 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:21,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-30 11:01:21,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:21,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:21,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:21,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:21,349 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 11:01:21,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 11:01:21,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 11:01:21,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 11:01:21,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:21,368 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-30 11:01:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:21,641 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-30 11:01:21,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 11:01:21,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 11:01:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:21,654 INFO L225 Difference]: With dead ends: 17 [2018-09-30 11:01:21,654 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 11:01:21,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 11:01:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 11:01:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 11:01:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 11:01:21,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-30 11:01:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:21,688 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 11:01:21,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 11:01:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 11:01:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 11:01:21,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:21,689 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 11:01:21,689 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:21,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:21,689 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-30 11:01:21,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:21,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:21,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:21,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:21,741 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 11:01:21,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 11:01:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 11:01:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 11:01:21,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:21,744 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-30 11:01:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:21,803 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 11:01:21,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 11:01:21,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 11:01:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:21,804 INFO L225 Difference]: With dead ends: 11 [2018-09-30 11:01:21,804 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 11:01:21,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 11:01:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 11:01:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 11:01:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-30 11:01:21,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-30 11:01:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:21,811 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-30 11:01:21,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 11:01:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-30 11:01:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 11:01:21,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:21,812 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 11:01:21,813 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:21,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-30 11:01:21,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:21,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:21,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:21,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:21,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 11:01:21,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 11:01:21,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 11:01:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 11:01:21,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:21,883 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-30 11:01:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:21,993 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 11:01:21,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 11:01:21,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 11:01:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:21,994 INFO L225 Difference]: With dead ends: 11 [2018-09-30 11:01:21,994 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 11:01:21,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 11:01:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 11:01:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 11:01:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-30 11:01:21,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-30 11:01:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:21,998 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-30 11:01:21,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 11:01:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-30 11:01:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 11:01:21,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:21,999 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 11:01:22,000 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:22,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-30 11:01:22,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:22,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:22,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:22,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:22,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:22,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:22,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:22,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 11:01:22,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 11:01:22,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 11:01:22,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:22,404 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-30 11:01:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:22,537 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 11:01:22,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 11:01:22,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-30 11:01:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:22,539 INFO L225 Difference]: With dead ends: 14 [2018-09-30 11:01:22,539 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 11:01:22,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 11:01:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-30 11:01:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 11:01:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 11:01:22,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-30 11:01:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:22,544 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 11:01:22,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 11:01:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 11:01:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 11:01:22,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:22,545 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 11:01:22,546 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:22,546 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-30 11:01:22,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:22,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:22,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:22,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:22,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:22,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:22,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:22,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:22,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:22,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 11:01:22,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 11:01:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 11:01:22,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:22,712 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-30 11:01:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:22,871 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-30 11:01:22,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 11:01:22,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 11:01:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:22,873 INFO L225 Difference]: With dead ends: 15 [2018-09-30 11:01:22,873 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 11:01:22,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 11:01:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 11:01:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 11:01:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 11:01:22,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-30 11:01:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:22,877 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 11:01:22,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 11:01:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 11:01:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 11:01:22,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:22,878 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 11:01:22,878 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:22,878 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:22,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-30 11:01:22,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:22,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:22,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:22,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:22,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:22,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:22,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-30 11:01:22,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:22,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:23,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:23,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 11:01:23,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 11:01:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 11:01:23,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:23,054 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-30 11:01:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:23,450 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 11:01:23,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 11:01:23,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 11:01:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:23,452 INFO L225 Difference]: With dead ends: 13 [2018-09-30 11:01:23,452 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 11:01:23,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 11:01:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 11:01:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 11:01:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-30 11:01:23,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-30 11:01:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:23,458 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-30 11:01:23,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 11:01:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-30 11:01:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 11:01:23,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:23,460 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-30 11:01:23,460 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:23,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-30 11:01:23,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:23,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:23,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:23,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:23,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:23,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:23,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:23,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:23,709 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:23,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:23,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:23,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:23,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 11:01:23,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 11:01:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 11:01:23,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:23,773 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-30 11:01:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:23,995 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 11:01:23,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 11:01:23,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-30 11:01:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:23,997 INFO L225 Difference]: With dead ends: 17 [2018-09-30 11:01:23,997 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 11:01:23,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 11:01:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-30 11:01:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 11:01:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 11:01:24,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 11:01:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:24,001 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 11:01:24,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 11:01:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 11:01:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 11:01:24,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:24,002 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-30 11:01:24,002 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:24,003 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-30 11:01:24,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:24,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:24,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:24,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:24,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:24,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:24,122 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-30 11:01:24,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:24,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:24,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 11:01:24,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 11:01:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 11:01:24,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:24,203 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-30 11:01:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:24,305 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-30 11:01:24,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 11:01:24,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 11:01:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:24,307 INFO L225 Difference]: With dead ends: 18 [2018-09-30 11:01:24,307 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 11:01:24,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 11:01:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 11:01:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 11:01:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 11:01:24,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-30 11:01:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:24,312 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 11:01:24,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 11:01:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 11:01:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 11:01:24,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:24,313 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-30 11:01:24,313 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:24,313 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-30 11:01:24,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:24,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:24,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:24,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:24,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:24,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:24,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-30 11:01:24,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:24,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:24,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 11:01:24,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 11:01:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 11:01:24,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:24,473 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-30 11:01:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:24,612 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 11:01:24,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 11:01:24,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 11:01:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:24,613 INFO L225 Difference]: With dead ends: 15 [2018-09-30 11:01:24,613 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 11:01:24,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 11:01:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 11:01:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 11:01:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-30 11:01:24,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-30 11:01:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:24,617 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-30 11:01:24,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 11:01:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-30 11:01:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 11:01:24,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:24,618 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-30 11:01:24,618 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:24,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-30 11:01:24,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:24,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:24,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:24,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:24,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:24,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:24,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:24,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 11:01:24,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 11:01:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 11:01:24,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:24,793 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-30 11:01:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:25,109 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-30 11:01:25,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 11:01:25,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-30 11:01:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:25,111 INFO L225 Difference]: With dead ends: 20 [2018-09-30 11:01:25,111 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 11:01:25,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 11:01:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 11:01:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 11:01:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 11:01:25,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-30 11:01:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:25,116 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 11:01:25,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 11:01:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 11:01:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 11:01:25,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:25,116 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-30 11:01:25,117 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:25,117 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-30 11:01:25,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:25,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:25,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:25,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:25,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:25,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:25,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:25,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:25,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:25,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 11:01:25,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 11:01:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 11:01:25,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:25,275 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-30 11:01:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:25,377 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-30 11:01:25,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 11:01:25,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 11:01:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:25,379 INFO L225 Difference]: With dead ends: 21 [2018-09-30 11:01:25,380 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 11:01:25,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 11:01:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 11:01:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 11:01:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-30 11:01:25,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-30 11:01:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:25,385 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-30 11:01:25,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 11:01:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-30 11:01:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 11:01:25,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:25,386 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-30 11:01:25,386 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:25,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-30 11:01:25,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:25,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:25,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:25,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:25,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:25,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:25,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 11:01:25,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:25,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:25,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 11:01:25,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 11:01:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 11:01:25,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:25,558 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-30 11:01:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:25,671 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 11:01:25,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 11:01:25,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 11:01:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:25,672 INFO L225 Difference]: With dead ends: 17 [2018-09-30 11:01:25,673 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 11:01:25,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 11:01:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 11:01:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 11:01:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-30 11:01:25,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-30 11:01:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:25,678 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-30 11:01:25,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 11:01:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-30 11:01:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 11:01:25,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:25,679 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-30 11:01:25,679 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:25,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-30 11:01:25,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:25,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:25,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:25,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:25,800 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:25,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:25,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:25,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:25,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 11:01:25,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 11:01:25,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 11:01:25,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:25,864 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-30 11:01:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:26,125 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-30 11:01:26,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 11:01:26,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-30 11:01:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:26,126 INFO L225 Difference]: With dead ends: 23 [2018-09-30 11:01:26,127 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 11:01:26,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 11:01:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-30 11:01:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 11:01:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 11:01:26,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-30 11:01:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:26,132 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 11:01:26,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 11:01:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 11:01:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 11:01:26,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:26,133 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-30 11:01:26,133 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:26,133 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-30 11:01:26,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:26,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:26,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:26,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:26,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:26,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:26,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:26,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 11:01:26,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:26,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:26,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 11:01:26,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 11:01:26,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 11:01:26,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:26,379 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-30 11:01:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:26,482 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-30 11:01:26,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 11:01:26,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 11:01:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:26,488 INFO L225 Difference]: With dead ends: 24 [2018-09-30 11:01:26,488 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 11:01:26,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 11:01:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 11:01:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 11:01:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 11:01:26,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-30 11:01:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:26,491 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 11:01:26,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 11:01:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 11:01:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 11:01:26,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:26,492 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-30 11:01:26,493 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:26,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-30 11:01:26,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:26,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:26,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:26,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:26,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:26,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:26,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:26,589 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 11:01:26,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:26,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:26,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 11:01:26,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 11:01:26,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 11:01:26,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:26,646 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-30 11:01:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:26,746 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 11:01:26,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 11:01:26,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 11:01:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:26,748 INFO L225 Difference]: With dead ends: 19 [2018-09-30 11:01:26,748 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 11:01:26,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 11:01:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 11:01:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 11:01:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-30 11:01:26,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-30 11:01:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:26,752 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-30 11:01:26,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 11:01:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-30 11:01:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 11:01:26,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:26,754 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-30 11:01:26,754 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:26,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-30 11:01:26,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:26,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:26,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:26,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:26,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:26,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:26,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:27,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:27,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:27,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 11:01:27,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 11:01:27,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 11:01:27,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:27,106 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-30 11:01:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:27,475 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-30 11:01:27,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 11:01:27,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-30 11:01:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:27,477 INFO L225 Difference]: With dead ends: 26 [2018-09-30 11:01:27,477 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 11:01:27,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 11:01:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 11:01:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 11:01:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-30 11:01:27,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-30 11:01:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:27,482 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-30 11:01:27,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 11:01:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-30 11:01:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 11:01:27,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:27,483 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-30 11:01:27,483 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:27,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-30 11:01:27,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:27,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:27,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:27,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:27,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:27,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:27,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:27,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:27,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:27,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:27,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:27,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 11:01:27,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 11:01:27,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 11:01:27,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:27,758 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-30 11:01:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:27,935 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-30 11:01:27,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 11:01:27,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 11:01:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:27,937 INFO L225 Difference]: With dead ends: 27 [2018-09-30 11:01:27,937 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 11:01:27,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 11:01:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 11:01:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 11:01:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-30 11:01:27,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-30 11:01:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:27,940 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-30 11:01:27,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 11:01:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-30 11:01:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 11:01:27,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:27,941 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-30 11:01:27,942 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:27,942 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-30 11:01:27,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:27,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:27,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:27,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:28,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:28,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:28,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 11:01:28,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:28,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:28,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 11:01:28,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 11:01:28,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 11:01:28,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:28,198 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-30 11:01:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:28,305 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 11:01:28,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 11:01:28,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 11:01:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:28,306 INFO L225 Difference]: With dead ends: 21 [2018-09-30 11:01:28,307 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 11:01:28,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 11:01:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 11:01:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 11:01:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-30 11:01:28,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-30 11:01:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:28,311 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-30 11:01:28,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 11:01:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-30 11:01:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:01:28,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:28,312 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-30 11:01:28,312 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:28,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-30 11:01:28,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:28,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:28,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:28,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:28,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:28,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:28,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:28,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:28,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:28,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:28,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 11:01:28,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 11:01:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 11:01:28,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:28,726 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-30 11:01:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:29,403 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-30 11:01:29,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 11:01:29,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-30 11:01:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:29,404 INFO L225 Difference]: With dead ends: 29 [2018-09-30 11:01:29,404 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 11:01:29,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 11:01:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-30 11:01:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 11:01:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 11:01:29,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-30 11:01:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:29,408 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 11:01:29,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 11:01:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 11:01:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 11:01:29,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:29,408 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-30 11:01:29,409 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:29,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-30 11:01:29,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:29,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:29,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:29,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:29,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:29,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:29,499 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:29,512 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 11:01:29,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:29,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:29,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:29,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:01:29,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:01:29,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:01:29,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:29,577 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-30 11:01:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:29,768 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-30 11:01:29,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:01:29,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 11:01:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:29,770 INFO L225 Difference]: With dead ends: 30 [2018-09-30 11:01:29,770 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 11:01:29,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 11:01:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 11:01:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 11:01:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 11:01:29,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-30 11:01:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:29,774 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 11:01:29,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:01:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 11:01:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 11:01:29,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:29,775 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-30 11:01:29,775 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:29,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-30 11:01:29,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:29,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:29,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:29,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:29,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:29,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:29,864 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:29,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 11:01:29,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:29,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:29,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:29,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:01:29,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:01:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:01:29,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:29,938 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-30 11:01:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:30,075 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 11:01:30,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:01:30,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 11:01:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:30,077 INFO L225 Difference]: With dead ends: 23 [2018-09-30 11:01:30,077 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 11:01:30,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 11:01:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 11:01:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 11:01:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-30 11:01:30,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-30 11:01:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:30,081 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-30 11:01:30,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:01:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-30 11:01:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:30,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:30,082 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-30 11:01:30,082 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:30,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-30 11:01:30,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:30,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:30,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:30,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:30,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:30,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:30,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:30,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:30,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:30,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:30,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 11:01:30,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:01:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:01:30,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:30,345 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-30 11:01:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:30,980 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-30 11:01:30,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:01:30,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-30 11:01:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:30,982 INFO L225 Difference]: With dead ends: 32 [2018-09-30 11:01:30,982 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 11:01:30,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 11:01:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 11:01:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 11:01:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-30 11:01:30,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-30 11:01:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:30,987 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-30 11:01:30,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:01:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-30 11:01:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 11:01:30,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:30,988 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-30 11:01:30,988 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:30,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-30 11:01:30,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:30,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:30,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:30,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:30,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:31,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:31,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:31,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:31,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:31,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:31,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:31,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:31,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:31,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:31,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:31,231 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-30 11:01:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:31,401 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-30 11:01:31,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:31,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 11:01:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:31,404 INFO L225 Difference]: With dead ends: 33 [2018-09-30 11:01:31,404 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 11:01:31,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 11:01:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 11:01:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 11:01:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 11:01:31,410 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-30 11:01:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:31,410 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 11:01:31,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 11:01:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 11:01:31,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:31,413 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-30 11:01:31,413 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:31,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-30 11:01:31,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:31,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:31,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:31,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:31,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:31,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:31,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:31,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:31,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 11:01:31,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:31,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:32,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:32,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:32,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:32,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:32,035 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-30 11:01:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:32,269 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 11:01:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:32,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 11:01:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:32,270 INFO L225 Difference]: With dead ends: 25 [2018-09-30 11:01:32,270 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 11:01:32,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 11:01:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 11:01:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 11:01:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-30 11:01:32,273 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-30 11:01:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:32,274 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-30 11:01:32,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-30 11:01:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 11:01:32,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:32,275 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-30 11:01:32,275 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:32,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-30 11:01:32,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:32,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:32,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:32,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:32,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:32,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:32,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:32,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:32,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:32,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:32,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:32,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:32,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:01:32,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:32,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:32,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:32,543 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-30 11:01:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:33,258 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-30 11:01:33,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:33,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-30 11:01:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:33,259 INFO L225 Difference]: With dead ends: 35 [2018-09-30 11:01:33,259 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 11:01:33,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 11:01:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-30 11:01:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:01:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-30 11:01:33,264 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-30 11:01:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:33,264 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-30 11:01:33,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-30 11:01:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 11:01:33,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:33,265 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-30 11:01:33,265 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:33,266 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:33,266 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-30 11:01:33,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:33,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:33,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:33,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:33,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:33,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:33,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:33,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:33,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 11:01:33,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:33,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:34,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:34,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 11:01:34,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 11:01:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 11:01:34,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:34,507 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-30 11:01:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:34,735 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 11:01:34,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 11:01:34,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 11:01:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:34,736 INFO L225 Difference]: With dead ends: 36 [2018-09-30 11:01:34,736 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 11:01:34,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 11:01:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 11:01:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 11:01:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-30 11:01:34,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-30 11:01:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:34,741 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-30 11:01:34,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 11:01:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-30 11:01:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 11:01:34,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:34,742 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-30 11:01:34,742 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:34,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-30 11:01:34,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:34,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:34,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:34,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:34,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:34,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:34,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:34,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:34,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 11:01:34,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:34,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:34,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:34,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 11:01:34,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 11:01:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 11:01:34,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:34,978 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-30 11:01:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:35,264 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 11:01:35,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 11:01:35,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 11:01:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:35,265 INFO L225 Difference]: With dead ends: 27 [2018-09-30 11:01:35,265 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 11:01:35,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 11:01:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 11:01:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:01:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-30 11:01:35,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-30 11:01:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:35,270 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-30 11:01:35,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 11:01:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-30 11:01:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 11:01:35,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:35,271 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-30 11:01:35,271 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:35,271 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-30 11:01:35,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:35,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:35,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:36,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:36,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:36,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:36,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:36,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:36,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:36,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 11:01:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 11:01:36,355 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:36,355 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-30 11:01:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:37,134 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-30 11:01:37,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 11:01:37,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-30 11:01:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:37,135 INFO L225 Difference]: With dead ends: 38 [2018-09-30 11:01:37,135 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 11:01:37,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 11:01:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 11:01:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:01:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-30 11:01:37,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-30 11:01:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:37,139 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-30 11:01:37,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 11:01:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-30 11:01:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 11:01:37,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:37,140 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-30 11:01:37,141 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:37,141 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-30 11:01:37,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:37,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:37,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:37,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:37,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:37,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:37,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:37,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:37,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:37,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 11:01:37,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 11:01:37,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 11:01:37,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:37,345 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-30 11:01:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:37,542 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-30 11:01:37,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 11:01:37,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 11:01:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:37,543 INFO L225 Difference]: With dead ends: 39 [2018-09-30 11:01:37,543 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 11:01:37,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 11:01:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 11:01:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 11:01:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 11:01:37,548 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-30 11:01:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:37,548 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 11:01:37,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 11:01:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 11:01:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 11:01:37,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:37,549 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-30 11:01:37,549 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:37,549 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-30 11:01:37,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:37,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:37,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:37,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:37,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:37,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:37,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 11:01:37,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:37,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:37,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 11:01:37,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 11:01:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 11:01:37,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:37,761 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-30 11:01:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:37,930 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 11:01:37,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 11:01:37,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 11:01:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:37,931 INFO L225 Difference]: With dead ends: 29 [2018-09-30 11:01:37,931 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 11:01:37,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 11:01:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 11:01:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:01:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-30 11:01:37,935 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-30 11:01:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:37,936 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-30 11:01:37,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 11:01:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-30 11:01:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 11:01:37,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:37,936 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-30 11:01:37,937 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:37,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-30 11:01:37,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:37,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:37,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:37,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:38,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:38,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:38,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:38,917 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:38,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:38,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:39,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:39,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 11:01:39,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 11:01:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 11:01:39,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:39,025 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-30 11:01:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:40,083 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 11:01:40,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 11:01:40,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-30 11:01:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:40,085 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:01:40,085 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 11:01:40,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 11:01:40,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-30 11:01:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:01:40,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 11:01:40,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-30 11:01:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:40,089 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 11:01:40,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 11:01:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 11:01:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 11:01:40,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:40,090 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-30 11:01:40,091 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:40,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-30 11:01:40,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:40,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:40,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:40,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:40,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:40,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:40,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:40,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 11:01:40,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:40,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:40,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 11:01:40,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 11:01:40,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 11:01:40,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:40,314 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-30 11:01:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:40,559 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-30 11:01:40,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 11:01:40,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 11:01:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:40,560 INFO L225 Difference]: With dead ends: 42 [2018-09-30 11:01:40,561 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 11:01:40,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 11:01:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 11:01:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 11:01:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 11:01:40,565 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-30 11:01:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:40,566 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 11:01:40,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 11:01:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 11:01:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 11:01:40,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:40,566 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-30 11:01:40,567 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:40,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:40,567 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-30 11:01:40,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:40,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:40,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:40,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:40,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:40,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:40,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:40,812 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 11:01:40,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:40,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:40,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 11:01:40,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 11:01:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 11:01:40,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:40,997 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-30 11:01:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:41,175 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 11:01:41,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 11:01:41,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 11:01:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:41,177 INFO L225 Difference]: With dead ends: 31 [2018-09-30 11:01:41,177 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 11:01:41,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 11:01:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 11:01:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:01:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-30 11:01:41,182 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-30 11:01:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:41,182 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-30 11:01:41,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 11:01:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-30 11:01:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 11:01:41,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:41,183 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-30 11:01:41,183 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:41,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-30 11:01:41,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:41,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:41,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:41,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:41,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:41,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:41,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:41,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 11:01:41,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 11:01:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 11:01:41,477 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:41,477 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-30 11:01:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:42,494 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 11:01:42,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 11:01:42,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-30 11:01:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:42,495 INFO L225 Difference]: With dead ends: 44 [2018-09-30 11:01:42,495 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:01:42,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:01:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 11:01:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-30 11:01:42,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-30 11:01:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:42,500 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-30 11:01:42,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 11:01:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-30 11:01:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 11:01:42,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:42,500 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-30 11:01:42,501 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:42,501 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-30 11:01:42,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:42,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:42,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:42,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:42,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:42,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:42,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:42,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:42,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:42,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:42,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 11:01:42,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 11:01:42,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 11:01:42,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:42,788 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-30 11:01:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:43,106 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-30 11:01:43,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 11:01:43,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 11:01:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:43,107 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:01:43,108 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 11:01:43,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 11:01:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 11:01:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 11:01:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 11:01:43,113 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-30 11:01:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:43,114 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 11:01:43,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 11:01:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 11:01:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 11:01:43,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:43,114 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-30 11:01:43,115 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:43,115 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:43,115 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-30 11:01:43,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:43,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:43,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:43,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:43,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:43,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:43,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:43,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 11:01:43,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:43,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:43,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:43,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 11:01:43,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 11:01:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 11:01:43,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:43,426 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-30 11:01:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:43,952 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 11:01:43,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 11:01:43,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 11:01:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:43,953 INFO L225 Difference]: With dead ends: 33 [2018-09-30 11:01:43,953 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 11:01:43,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 11:01:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 11:01:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-30 11:01:43,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-30 11:01:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:43,957 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-30 11:01:43,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 11:01:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-30 11:01:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 11:01:43,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:43,958 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-30 11:01:43,958 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:43,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-30 11:01:43,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:43,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:43,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:43,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:44,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:44,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:44,247 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:44,264 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:44,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:44,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:44,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:44,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 11:01:44,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 11:01:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 11:01:44,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:44,342 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-30 11:01:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:45,552 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-30 11:01:45,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 11:01:45,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-30 11:01:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:45,553 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:01:45,553 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 11:01:45,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 11:01:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-30 11:01:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-30 11:01:45,557 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-30 11:01:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:45,557 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-30 11:01:45,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 11:01:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-30 11:01:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 11:01:45,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:45,558 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-30 11:01:45,558 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:45,558 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-30 11:01:45,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:45,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:45,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:45,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:45,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:45,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:45,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:45,919 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:45,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:01:45,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:45,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:46,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:46,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 11:01:46,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 11:01:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 11:01:46,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:46,050 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-30 11:01:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:46,346 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-30 11:01:46,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 11:01:46,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 11:01:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:46,347 INFO L225 Difference]: With dead ends: 48 [2018-09-30 11:01:46,347 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 11:01:46,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 11:01:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 11:01:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 11:01:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-30 11:01:46,350 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-30 11:01:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:46,350 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-30 11:01:46,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 11:01:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-30 11:01:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 11:01:46,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:46,351 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-30 11:01:46,351 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:46,351 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-30 11:01:46,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:46,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:46,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:46,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:46,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:46,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:46,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:46,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:01:46,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:46,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:46,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:46,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 11:01:46,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 11:01:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 11:01:46,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:46,629 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-30 11:01:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:46,827 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 11:01:46,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 11:01:46,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 11:01:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:46,829 INFO L225 Difference]: With dead ends: 35 [2018-09-30 11:01:46,829 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 11:01:46,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 11:01:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 11:01:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-30 11:01:46,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-30 11:01:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:46,833 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-30 11:01:46,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 11:01:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-30 11:01:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 11:01:46,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:46,834 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-30 11:01:46,835 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:46,835 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-30 11:01:46,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:46,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:46,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:46,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:47,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:47,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:47,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:47,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:47,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:47,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 11:01:47,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 11:01:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 11:01:47,229 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:47,229 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-30 11:01:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:48,530 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-30 11:01:48,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 11:01:48,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-30 11:01:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:48,531 INFO L225 Difference]: With dead ends: 50 [2018-09-30 11:01:48,532 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:48,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 11:01:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-30 11:01:48,534 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-30 11:01:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:48,535 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-30 11:01:48,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 11:01:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-30 11:01:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 11:01:48,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:48,535 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-30 11:01:48,536 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:48,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-30 11:01:48,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:48,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:48,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:48,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:48,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:48,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:48,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:48,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:48,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:48,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:48,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:48,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:48,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 11:01:48,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 11:01:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 11:01:48,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:48,958 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-30 11:01:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:49,518 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-30 11:01:49,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 11:01:49,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 11:01:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:49,519 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:49,519 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 11:01:49,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 11:01:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 11:01:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 11:01:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 11:01:49,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-30 11:01:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:49,522 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 11:01:49,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 11:01:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 11:01:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 11:01:49,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:49,522 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-30 11:01:49,523 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:49,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-30 11:01:49,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:49,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:49,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:49,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:49,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:49,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:49,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:49,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:01:49,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:49,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:49,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:49,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 11:01:49,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 11:01:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 11:01:49,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:49,800 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-30 11:01:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:49,991 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 11:01:49,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 11:01:49,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 11:01:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:49,993 INFO L225 Difference]: With dead ends: 37 [2018-09-30 11:01:49,993 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 11:01:49,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 11:01:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 11:01:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-30 11:01:49,995 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-30 11:01:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:49,996 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-30 11:01:49,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 11:01:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-30 11:01:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 11:01:49,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:49,996 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-30 11:01:49,996 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:49,996 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-30 11:01:49,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:49,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:49,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:49,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:50,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:50,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:50,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:50,344 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:50,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:50,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:50,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:50,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 11:01:50,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 11:01:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 11:01:50,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:50,529 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-30 11:01:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:51,990 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 11:01:51,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 11:01:51,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-30 11:01:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:51,992 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:51,992 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 11:01:51,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 11:01:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-30 11:01:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 11:01:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-30 11:01:51,996 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-30 11:01:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:51,996 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-30 11:01:51,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 11:01:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-30 11:01:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 11:01:51,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:51,997 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-30 11:01:51,997 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:51,997 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:51,997 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-30 11:01:51,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:51,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:51,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:51,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:51,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:52,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:52,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:52,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:52,133 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:52,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:52,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:52,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:52,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 11:01:52,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 11:01:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 11:01:52,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:52,222 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-30 11:01:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:52,607 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-30 11:01:52,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 11:01:52,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 11:01:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:52,608 INFO L225 Difference]: With dead ends: 54 [2018-09-30 11:01:52,608 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 11:01:52,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 11:01:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 11:01:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 11:01:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 11:01:52,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-30 11:01:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:52,612 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 11:01:52,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 11:01:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 11:01:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 11:01:52,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:52,613 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-30 11:01:52,613 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:52,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-30 11:01:52,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:52,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:52,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:52,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:52,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:52,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:52,786 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:52,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:52,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:52,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:52,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:52,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 11:01:52,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 11:01:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 11:01:52,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:52,892 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-30 11:01:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:53,101 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 11:01:53,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 11:01:53,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 11:01:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:53,102 INFO L225 Difference]: With dead ends: 39 [2018-09-30 11:01:53,102 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 11:01:53,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 11:01:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 11:01:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 11:01:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-30 11:01:53,107 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-30 11:01:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:53,107 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-30 11:01:53,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 11:01:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-30 11:01:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 11:01:53,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:53,108 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-30 11:01:53,108 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:53,108 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:53,108 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-30 11:01:53,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:53,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:53,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:53,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:53,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:53,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:53,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:53,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:53,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:53,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:53,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 11:01:53,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 11:01:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 11:01:53,606 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:53,607 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-30 11:01:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:55,397 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-30 11:01:55,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 11:01:55,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-30 11:01:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:55,398 INFO L225 Difference]: With dead ends: 56 [2018-09-30 11:01:55,398 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:55,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-30 11:01:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 11:01:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-30 11:01:55,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-30 11:01:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:55,402 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-30 11:01:55,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 11:01:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-30 11:01:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 11:01:55,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:55,403 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-30 11:01:55,403 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:55,403 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-30 11:01:55,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:55,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:55,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:55,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:55,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:55,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:55,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:55,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:55,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:55,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:55,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:55,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 11:01:55,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 11:01:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 11:01:55,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:55,657 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-30 11:01:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:56,259 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-30 11:01:56,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 11:01:56,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 11:01:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:56,260 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:56,260 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 11:01:56,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 11:01:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 11:01:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 11:01:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 11:01:56,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-30 11:01:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:56,263 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 11:01:56,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 11:01:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 11:01:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 11:01:56,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:56,264 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-30 11:01:56,264 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:56,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-30 11:01:56,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:56,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:56,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:56,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:56,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:56,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:56,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:56,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:56,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:56,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:56,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:56,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:56,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 11:01:56,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 11:01:56,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 11:01:56,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:56,516 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-30 11:01:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:56,719 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 11:01:56,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 11:01:56,720 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 11:01:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:56,720 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:01:56,721 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 11:01:56,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 11:01:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 11:01:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 11:01:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-30 11:01:56,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-30 11:01:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:56,725 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-30 11:01:56,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 11:01:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-30 11:01:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 11:01:56,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:56,726 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-30 11:01:56,726 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:56,726 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-30 11:01:56,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:56,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:56,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:56,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:56,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:57,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:57,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:57,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:57,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:57,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:57,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:57,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:57,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 11:01:57,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 11:01:57,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 11:01:57,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:57,162 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-30 11:01:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:59,342 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-30 11:01:59,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 11:01:59,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-30 11:01:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:59,344 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:01:59,344 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 11:01:59,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 11:01:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-30 11:01:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 11:01:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 11:01:59,348 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-30 11:01:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:59,348 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 11:01:59,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 11:01:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 11:01:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 11:01:59,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:59,348 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-30 11:01:59,349 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:59,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-30 11:01:59,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:59,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:59,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:59,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:59,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:59,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:59,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:59,508 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:59,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 11:01:59,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:59,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:00,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:00,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 11:02:00,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 11:02:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 11:02:00,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:00,381 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-30 11:02:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:01,370 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 11:02:01,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 11:02:01,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 11:02:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:01,372 INFO L225 Difference]: With dead ends: 60 [2018-09-30 11:02:01,372 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 11:02:01,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 11:02:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 11:02:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 11:02:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-30 11:02:01,375 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-30 11:02:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:01,375 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-30 11:02:01,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 11:02:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-30 11:02:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 11:02:01,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:01,376 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-30 11:02:01,376 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:01,376 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-30 11:02:01,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:01,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:01,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:01,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:01,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:01,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:01,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:01,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:01,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 11:02:01,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:01,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:01,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:01,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 11:02:01,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 11:02:01,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 11:02:01,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:01,760 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-30 11:02:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:02,046 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 11:02:02,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 11:02:02,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 11:02:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:02,047 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:02:02,047 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 11:02:02,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 11:02:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 11:02:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 11:02:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-30 11:02:02,051 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-30 11:02:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:02,051 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-30 11:02:02,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 11:02:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-30 11:02:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 11:02:02,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:02,053 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-30 11:02:02,053 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:02,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:02,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-30 11:02:02,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:02,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:02,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:02,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:02,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:02,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:02,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:02,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:02,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:02,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:02,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 11:02:02,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 11:02:02,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 11:02:02,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:02,470 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-30 11:02:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:04,633 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-30 11:02:04,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 11:02:04,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-30 11:02:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:04,635 INFO L225 Difference]: With dead ends: 62 [2018-09-30 11:02:04,635 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:04,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-30 11:02:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 11:02:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-30 11:02:04,639 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-30 11:02:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:04,639 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-30 11:02:04,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 11:02:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-30 11:02:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 11:02:04,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:04,640 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-30 11:02:04,640 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:04,640 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:04,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-30 11:02:04,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:04,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:04,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:04,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:04,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:04,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:04,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:04,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:04,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:04,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:04,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:05,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:05,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 11:02:05,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 11:02:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 11:02:05,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:05,108 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-30 11:02:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:05,636 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-30 11:02:05,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 11:02:05,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 11:02:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:05,637 INFO L225 Difference]: With dead ends: 63 [2018-09-30 11:02:05,637 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:02:05,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:02:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 11:02:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 11:02:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 11:02:05,641 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-30 11:02:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:05,641 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 11:02:05,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 11:02:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 11:02:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 11:02:05,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:05,642 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-30 11:02:05,642 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:05,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-30 11:02:05,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:05,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:05,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:05,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:05,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:06,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:06,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:06,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:06,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 11:02:06,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:06,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:06,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:06,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 11:02:06,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 11:02:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 11:02:06,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:06,387 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-30 11:02:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:06,656 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 11:02:06,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 11:02:06,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 11:02:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:06,657 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:02:06,657 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 11:02:06,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 11:02:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 11:02:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 11:02:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-30 11:02:06,660 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-30 11:02:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:06,661 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-30 11:02:06,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 11:02:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-30 11:02:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 11:02:06,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:06,662 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-30 11:02:06,662 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:06,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-30 11:02:06,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:06,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:06,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:06,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:06,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:07,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:07,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:07,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:07,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:07,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:07,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:07,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:07,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 11:02:07,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 11:02:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 11:02:07,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:07,314 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-30 11:02:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:09,732 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 11:02:09,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 11:02:09,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-30 11:02:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:09,733 INFO L225 Difference]: With dead ends: 65 [2018-09-30 11:02:09,733 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 11:02:09,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 11:02:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-30 11:02:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 11:02:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-30 11:02:09,737 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-30 11:02:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:09,737 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-30 11:02:09,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 11:02:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-30 11:02:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 11:02:09,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:09,737 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-30 11:02:09,738 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:09,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:09,738 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-30 11:02:09,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:09,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:09,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:09,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:09,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:10,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:10,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:10,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:10,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-30 11:02:10,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:10,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:10,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:10,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 11:02:10,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 11:02:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 11:02:10,269 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:10,269 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-30 11:02:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:10,850 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-30 11:02:10,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 11:02:10,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 11:02:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:10,851 INFO L225 Difference]: With dead ends: 66 [2018-09-30 11:02:10,851 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:02:10,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:02:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 11:02:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 11:02:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 11:02:10,856 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-30 11:02:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:10,856 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 11:02:10,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 11:02:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 11:02:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 11:02:10,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:10,856 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-30 11:02:10,857 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:10,857 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-30 11:02:10,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:10,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:10,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:10,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:10,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:11,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:11,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:11,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:11,761 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-30 11:02:11,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:11,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:11,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:11,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 11:02:11,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 11:02:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 11:02:11,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:11,949 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-30 11:02:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:12,419 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 11:02:12,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 11:02:12,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 11:02:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:12,420 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:02:12,420 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 11:02:12,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 11:02:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 11:02:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 11:02:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-30 11:02:12,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-30 11:02:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:12,423 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-30 11:02:12,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 11:02:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-30 11:02:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 11:02:12,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:12,424 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-30 11:02:12,424 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:12,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:12,424 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-30 11:02:12,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:12,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:12,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:12,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:12,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:13,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:13,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:13,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:13,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:13,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:13,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 11:02:13,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 11:02:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 11:02:13,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:13,601 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-30 11:02:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:16,252 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 11:02:16,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 11:02:16,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-30 11:02:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:16,253 INFO L225 Difference]: With dead ends: 68 [2018-09-30 11:02:16,253 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 11:02:16,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 11:02:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-30 11:02:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 11:02:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 11:02:16,257 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-30 11:02:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:16,257 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 11:02:16,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 11:02:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 11:02:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 11:02:16,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:16,258 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-30 11:02:16,258 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:16,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-30 11:02:16,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:16,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:16,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:16,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:16,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:16,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:16,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:16,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:16,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:16,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:16,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:16,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:16,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 11:02:16,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 11:02:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 11:02:16,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:16,582 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-30 11:02:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:17,223 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-30 11:02:17,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 11:02:17,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 11:02:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:17,224 INFO L225 Difference]: With dead ends: 69 [2018-09-30 11:02:17,224 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:02:17,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:02:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 11:02:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 11:02:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 11:02:17,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-30 11:02:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:17,229 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 11:02:17,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 11:02:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 11:02:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 11:02:17,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:17,230 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-30 11:02:17,230 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:17,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-30 11:02:17,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:17,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:17,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:17,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:17,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:17,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:17,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:17,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:17,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 11:02:17,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:17,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:17,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:17,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 11:02:17,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 11:02:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 11:02:17,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:17,535 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-30 11:02:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:17,845 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 11:02:17,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 11:02:17,845 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 11:02:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:17,846 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:02:17,846 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 11:02:17,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 11:02:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 11:02:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 11:02:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-30 11:02:17,850 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-30 11:02:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:17,850 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-30 11:02:17,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 11:02:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-30 11:02:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 11:02:17,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:17,851 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-30 11:02:17,851 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:17,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-30 11:02:17,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:17,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:17,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:17,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:17,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:18,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:18,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:18,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:18,671 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:18,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:18,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:18,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:18,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 11:02:18,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 11:02:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 11:02:18,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:18,769 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-30 11:02:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:21,635 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-30 11:02:21,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 11:02:21,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-30 11:02:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:21,637 INFO L225 Difference]: With dead ends: 71 [2018-09-30 11:02:21,637 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 11:02:21,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 11:02:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-30 11:02:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 11:02:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-30 11:02:21,641 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-30 11:02:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:21,641 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-30 11:02:21,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 11:02:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-30 11:02:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 11:02:21,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:21,642 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-30 11:02:21,642 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:21,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-30 11:02:21,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:21,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:21,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:21,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:21,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:21,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:21,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:21,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:22,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 11:02:22,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:22,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:22,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:22,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 11:02:22,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 11:02:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 11:02:22,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:22,202 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-30 11:02:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:22,820 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-30 11:02:22,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 11:02:22,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 11:02:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:22,821 INFO L225 Difference]: With dead ends: 72 [2018-09-30 11:02:22,821 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:02:22,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:02:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 11:02:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 11:02:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-30 11:02:22,826 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-30 11:02:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:22,826 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-30 11:02:22,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 11:02:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-30 11:02:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 11:02:22,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:22,827 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-30 11:02:22,827 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:22,827 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-30 11:02:22,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:22,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:22,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:22,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:22,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:23,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:23,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:23,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:23,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 11:02:23,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:23,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:23,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:23,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 11:02:23,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 11:02:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 11:02:23,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:23,571 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-30 11:02:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:23,861 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 11:02:23,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 11:02:23,861 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 11:02:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:23,862 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:02:23,862 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 11:02:23,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 11:02:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 11:02:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 11:02:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-30 11:02:23,865 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-30 11:02:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:23,865 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-30 11:02:23,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 11:02:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-30 11:02:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 11:02:23,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:23,866 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-30 11:02:23,866 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:23,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:23,866 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-30 11:02:23,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:23,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:23,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:23,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:23,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:24,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:24,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:24,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:24,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:24,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:24,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 11:02:24,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 11:02:24,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 11:02:24,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:24,443 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-30 11:02:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:27,558 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-30 11:02:27,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 11:02:27,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-30 11:02:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:27,559 INFO L225 Difference]: With dead ends: 74 [2018-09-30 11:02:27,559 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 11:02:27,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 11:02:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-30 11:02:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 11:02:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 11:02:27,563 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-30 11:02:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:27,564 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 11:02:27,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 11:02:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 11:02:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 11:02:27,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:27,564 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-30 11:02:27,565 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:27,565 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-30 11:02:27,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:27,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:27,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:27,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:27,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:27,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:27,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:27,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:27,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:27,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:27,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:27,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:27,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 11:02:27,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 11:02:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 11:02:27,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:27,839 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-30 11:02:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:28,619 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-30 11:02:28,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 11:02:28,619 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 11:02:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:28,620 INFO L225 Difference]: With dead ends: 75 [2018-09-30 11:02:28,620 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:02:28,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:02:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 11:02:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 11:02:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 11:02:28,625 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-30 11:02:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:28,625 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 11:02:28,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 11:02:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 11:02:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 11:02:28,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:28,626 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-30 11:02:28,626 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:28,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-30 11:02:28,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:28,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:28,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:28,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:28,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:29,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:29,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:29,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:29,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 11:02:29,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:29,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:29,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:29,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 11:02:29,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 11:02:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 11:02:29,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:29,312 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-30 11:02:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:29,619 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 11:02:29,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 11:02:29,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 11:02:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:29,620 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:02:29,620 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 11:02:29,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 11:02:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 11:02:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 11:02:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-30 11:02:29,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-30 11:02:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:29,624 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-30 11:02:29,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 11:02:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-30 11:02:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 11:02:29,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:29,625 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-30 11:02:29,625 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:29,625 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:29,625 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-30 11:02:29,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:29,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:29,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:29,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:29,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:30,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:30,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:30,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:30,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:30,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:30,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:30,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:30,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 11:02:30,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 11:02:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 11:02:30,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:30,236 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-30 11:02:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:33,633 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 11:02:33,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 11:02:33,633 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-30 11:02:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:33,634 INFO L225 Difference]: With dead ends: 77 [2018-09-30 11:02:33,634 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 11:02:33,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 11:02:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-30 11:02:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 11:02:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 11:02:33,638 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-30 11:02:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:33,639 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 11:02:33,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 11:02:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 11:02:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 11:02:33,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:33,639 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-30 11:02:33,639 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:33,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:33,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-30 11:02:33,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:33,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:33,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:33,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:33,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:33,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:33,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:33,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:33,800 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 11:02:33,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:33,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:33,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:33,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 11:02:33,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 11:02:33,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 11:02:33,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:33,904 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-30 11:02:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:34,684 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-30 11:02:34,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 11:02:34,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 11:02:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:34,685 INFO L225 Difference]: With dead ends: 78 [2018-09-30 11:02:34,685 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:02:34,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:02:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 11:02:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 11:02:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 11:02:34,689 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-30 11:02:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:34,689 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 11:02:34,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 11:02:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 11:02:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 11:02:34,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:34,690 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-30 11:02:34,690 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:34,690 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:34,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-30 11:02:34,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:34,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:34,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:34,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:34,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:34,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:34,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:34,868 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:34,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 11:02:34,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:34,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:35,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:35,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 11:02:35,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 11:02:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 11:02:35,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:35,015 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-30 11:02:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:35,477 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 11:02:35,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 11:02:35,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 11:02:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:35,478 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:02:35,478 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 11:02:35,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 11:02:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 11:02:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 11:02:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-30 11:02:35,482 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-30 11:02:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:35,482 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-30 11:02:35,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 11:02:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-30 11:02:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 11:02:35,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:35,483 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-30 11:02:35,483 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:35,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-30 11:02:35,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:35,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:35,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:35,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:35,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:36,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:36,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:36,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:36,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:36,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:36,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 11:02:36,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 11:02:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 11:02:36,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:36,417 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-30 11:02:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:40,107 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-30 11:02:40,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 11:02:40,108 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-30 11:02:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:40,108 INFO L225 Difference]: With dead ends: 80 [2018-09-30 11:02:40,108 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 11:02:40,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 11:02:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-30 11:02:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 11:02:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-30 11:02:40,112 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-30 11:02:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:40,112 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-30 11:02:40,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 11:02:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-30 11:02:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 11:02:40,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:40,113 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-30 11:02:40,113 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:40,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-30 11:02:40,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:40,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:40,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:40,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:40,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:40,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:40,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:40,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:40,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:40,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:40,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:40,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:40,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 11:02:40,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 11:02:40,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 11:02:40,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:40,487 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-30 11:02:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:41,417 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-30 11:02:41,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 11:02:41,418 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 11:02:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:41,418 INFO L225 Difference]: With dead ends: 81 [2018-09-30 11:02:41,418 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:02:41,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:02:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 11:02:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 11:02:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 11:02:41,423 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-30 11:02:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:41,423 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 11:02:41,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 11:02:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 11:02:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 11:02:41,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:41,424 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-30 11:02:41,424 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:41,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-30 11:02:41,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:41,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:41,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:41,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:41,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:41,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:41,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:41,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:41,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-30 11:02:41,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:41,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:41,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:41,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 11:02:41,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 11:02:41,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 11:02:41,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:41,804 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-30 11:02:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:42,107 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 11:02:42,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 11:02:42,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 11:02:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:42,109 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:42,109 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 11:02:42,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 11:02:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 11:02:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 11:02:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-30 11:02:42,113 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-30 11:02:42,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:42,113 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-30 11:02:42,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 11:02:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-30 11:02:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 11:02:42,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:42,113 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-30 11:02:42,113 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:42,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:42,114 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-30 11:02:42,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:42,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:42,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:42,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:42,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:42,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:42,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:42,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:42,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:42,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:42,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:42,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:42,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 11:02:42,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 11:02:42,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 11:02:42,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:42,927 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-30 11:02:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:46,973 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-30 11:02:46,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 11:02:46,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-30 11:02:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:46,975 INFO L225 Difference]: With dead ends: 83 [2018-09-30 11:02:46,975 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 11:02:46,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 11:02:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-30 11:02:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 11:02:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 11:02:46,979 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-30 11:02:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:46,979 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 11:02:46,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 11:02:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 11:02:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 11:02:46,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:46,980 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-30 11:02:46,980 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:46,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-30 11:02:46,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:46,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:46,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:46,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:46,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:47,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:47,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:47,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:47,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 11:02:47,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:47,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:47,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:47,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 11:02:47,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 11:02:47,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 11:02:47,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:47,497 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-30 11:02:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:48,472 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 11:02:48,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 11:02:48,472 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 11:02:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:48,473 INFO L225 Difference]: With dead ends: 84 [2018-09-30 11:02:48,474 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:48,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 11:02:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 11:02:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-30 11:02:48,478 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-30 11:02:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:48,478 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-30 11:02:48,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 11:02:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-30 11:02:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 11:02:48,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:48,479 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-30 11:02:48,479 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:48,480 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-30 11:02:48,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:48,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:48,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:48,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:48,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:48,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:48,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:48,942 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:48,976 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 11:02:48,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:48,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:49,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:49,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 11:02:49,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 11:02:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 11:02:49,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:49,231 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-30 11:02:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:49,608 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 11:02:49,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 11:02:49,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 11:02:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:49,609 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:02:49,610 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 11:02:49,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 11:02:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 11:02:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 11:02:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-30 11:02:49,614 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-30 11:02:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:49,614 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-30 11:02:49,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 11:02:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-30 11:02:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 11:02:49,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:49,615 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-30 11:02:49,615 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:49,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-30 11:02:49,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:49,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:49,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:49,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:49,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:50,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:50,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:50,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:50,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:50,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:50,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 11:02:50,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 11:02:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 11:02:50,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:50,309 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-30 11:02:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:54,650 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-30 11:02:54,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 11:02:54,650 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-30 11:02:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:54,651 INFO L225 Difference]: With dead ends: 86 [2018-09-30 11:02:54,651 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 11:02:54,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 11:02:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-30 11:02:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 11:02:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-30 11:02:54,657 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-30 11:02:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:54,657 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-30 11:02:54,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 11:02:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-30 11:02:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 11:02:54,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:54,658 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-30 11:02:54,658 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:54,658 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-30 11:02:54,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:54,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:54,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:54,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:54,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:55,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:55,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:55,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:55,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:55,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:55,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:55,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:55,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 11:02:55,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 11:02:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 11:02:55,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:55,618 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-30 11:02:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:56,703 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-30 11:02:56,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 11:02:56,704 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 11:02:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:56,704 INFO L225 Difference]: With dead ends: 87 [2018-09-30 11:02:56,705 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:02:56,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:02:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 11:02:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 11:02:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 11:02:56,708 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-30 11:02:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:56,708 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 11:02:56,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 11:02:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 11:02:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 11:02:56,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:56,709 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-30 11:02:56,709 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:56,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-30 11:02:56,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:56,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:56,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:56,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:56,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:57,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:57,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:57,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:57,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-30 11:02:57,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:57,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:57,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:57,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 11:02:57,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 11:02:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 11:02:57,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:57,213 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-30 11:02:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:58,198 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 11:02:58,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 11:02:58,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 11:02:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:58,199 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:58,199 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 11:02:58,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 11:02:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 11:02:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 11:02:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-30 11:02:58,203 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-30 11:02:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:58,204 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-30 11:02:58,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 11:02:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-30 11:02:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 11:02:58,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:58,204 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-30 11:02:58,204 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:58,204 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-30 11:02:58,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:58,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:58,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:59,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:59,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:59,549 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:59,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:59,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:59,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:00,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:00,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 11:03:00,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 11:03:00,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 11:03:00,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:00,937 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-30 11:03:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:05,581 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 11:03:05,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 11:03:05,582 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-30 11:03:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:05,582 INFO L225 Difference]: With dead ends: 89 [2018-09-30 11:03:05,583 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 11:03:05,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 11:03:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-30 11:03:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 11:03:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-30 11:03:05,587 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-30 11:03:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:05,587 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-30 11:03:05,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 11:03:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-30 11:03:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 11:03:05,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:05,588 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-30 11:03:05,588 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:05,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-30 11:03:05,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:05,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:05,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:05,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:05,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:06,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:06,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:06,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:03:06,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-30 11:03:06,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:06,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:06,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:06,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 11:03:06,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 11:03:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 11:03:06,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:06,266 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-30 11:03:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:07,059 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-30 11:03:07,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 11:03:07,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 11:03:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:07,061 INFO L225 Difference]: With dead ends: 90 [2018-09-30 11:03:07,061 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:03:07,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:03:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 11:03:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 11:03:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 11:03:07,066 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-30 11:03:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:07,066 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 11:03:07,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 11:03:07,066 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 11:03:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 11:03:07,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:07,067 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-30 11:03:07,067 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:07,067 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-30 11:03:07,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:07,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:07,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:07,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:07,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:08,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:08,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:08,013 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:03:08,048 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-30 11:03:08,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:08,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:08,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:08,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 11:03:08,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 11:03:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 11:03:08,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:08,170 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-30 11:03:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:08,522 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 11:03:08,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 11:03:08,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 11:03:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:08,523 INFO L225 Difference]: With dead ends: 63 [2018-09-30 11:03:08,523 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 11:03:08,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 11:03:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 11:03:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 11:03:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-30 11:03:08,528 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-30 11:03:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:08,528 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-30 11:03:08,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 11:03:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-30 11:03:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 11:03:08,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:08,529 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-30 11:03:08,529 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:08,529 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-30 11:03:08,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:08,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:08,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:09,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:09,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:09,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:09,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:09,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:09,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 11:03:09,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 11:03:09,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 11:03:09,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:09,418 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-30 11:03:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:14,515 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 11:03:14,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 11:03:14,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-30 11:03:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:14,516 INFO L225 Difference]: With dead ends: 92 [2018-09-30 11:03:14,516 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 11:03:14,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 11:03:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-30 11:03:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 11:03:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-30 11:03:14,521 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-30 11:03:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:14,521 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-30 11:03:14,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 11:03:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-30 11:03:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 11:03:14,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:14,522 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-30 11:03:14,522 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:14,522 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-30 11:03:14,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:14,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:14,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:14,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:14,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:14,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:14,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:14,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:03:14,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:03:14,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:14,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:14,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:14,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 11:03:14,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 11:03:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 11:03:14,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:14,898 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-30 11:03:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:16,190 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-30 11:03:16,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 11:03:16,190 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 11:03:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:16,191 INFO L225 Difference]: With dead ends: 93 [2018-09-30 11:03:16,191 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 11:03:16,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 11:03:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 11:03:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 11:03:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 11:03:16,198 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-30 11:03:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:16,198 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 11:03:16,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 11:03:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 11:03:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 11:03:16,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:16,199 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-30 11:03:16,199 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:16,199 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-30 11:03:16,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:16,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:16,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:16,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:16,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:17,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:17,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:17,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:03:17,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 11:03:17,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:17,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:17,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:17,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 11:03:17,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 11:03:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 11:03:17,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:17,190 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-30 11:03:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:17,603 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 11:03:17,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 11:03:17,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 11:03:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:17,604 INFO L225 Difference]: With dead ends: 65 [2018-09-30 11:03:17,604 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 11:03:17,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 11:03:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 11:03:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 11:03:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-30 11:03:17,610 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-30 11:03:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:17,610 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-30 11:03:17,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 11:03:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-30 11:03:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 11:03:17,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:17,611 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-30 11:03:17,611 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:17,611 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-30 11:03:17,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:17,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:17,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:18,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:18,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:18,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:03:18,255 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:03:18,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:18,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:18,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:18,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 11:03:18,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 11:03:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 11:03:18,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:18,430 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-30 11:03:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:23,774 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-30 11:03:23,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 11:03:23,775 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-30 11:03:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:23,776 INFO L225 Difference]: With dead ends: 95 [2018-09-30 11:03:23,776 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 11:03:23,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 11:03:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-30 11:03:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 11:03:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-30 11:03:23,782 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-30 11:03:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:23,782 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-30 11:03:23,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 11:03:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-30 11:03:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 11:03:23,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:23,783 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-30 11:03:23,783 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:23,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-30 11:03:23,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:23,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:23,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:23,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:23,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:24,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:24,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:24,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:03:24,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 11:03:24,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:24,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:24,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:24,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 11:03:24,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 11:03:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 11:03:24,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:24,773 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-30 11:03:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:25,614 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-30 11:03:25,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 11:03:25,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 11:03:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:25,616 INFO L225 Difference]: With dead ends: 96 [2018-09-30 11:03:25,616 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 11:03:25,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 11:03:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 11:03:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 11:03:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-30 11:03:25,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-30 11:03:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:25,621 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-30 11:03:25,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 11:03:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-30 11:03:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 11:03:25,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:25,621 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-30 11:03:25,622 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:25,622 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-30 11:03:25,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:25,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:25,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:25,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:25,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:26,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:26,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:26,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:03:26,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 11:03:26,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:26,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:26,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:26,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 11:03:26,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 11:03:26,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 11:03:26,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:26,304 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-30 11:03:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:26,687 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 11:03:26,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 11:03:26,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 11:03:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:26,688 INFO L225 Difference]: With dead ends: 67 [2018-09-30 11:03:26,688 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 11:03:26,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 11:03:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 11:03:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 11:03:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-30 11:03:26,693 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-30 11:03:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:26,694 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-30 11:03:26,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 11:03:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-30 11:03:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 11:03:26,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:26,694 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-30 11:03:26,695 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:26,695 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-30 11:03:26,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:26,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:26,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:27,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:27,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:27,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:27,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:27,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:27,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 11:03:27,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 11:03:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 11:03:27,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:27,511 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-30 11:03:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:33,261 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-30 11:03:33,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 11:03:33,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-30 11:03:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:33,262 INFO L225 Difference]: With dead ends: 98 [2018-09-30 11:03:33,263 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 11:03:33,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 11:03:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-30 11:03:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 11:03:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 11:03:33,267 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-30 11:03:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:33,268 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 11:03:33,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 11:03:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 11:03:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 11:03:33,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:33,268 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-30 11:03:33,268 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:33,268 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-30 11:03:33,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:33,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:33,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:33,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:33,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:33,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:33,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:33,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:03:33,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:03:33,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:33,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:33,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:33,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 11:03:33,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 11:03:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 11:03:33,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:33,836 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-30 11:03:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:35,270 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-30 11:03:35,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 11:03:35,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 11:03:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:35,272 INFO L225 Difference]: With dead ends: 99 [2018-09-30 11:03:35,272 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 11:03:35,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 11:03:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 11:03:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 11:03:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 11:03:35,276 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-30 11:03:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:35,276 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 11:03:35,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 11:03:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 11:03:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 11:03:35,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:35,277 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-30 11:03:35,277 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:35,277 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-30 11:03:35,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:35,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:35,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:35,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:35,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:35,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:35,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:35,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:03:35,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 11:03:35,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:35,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:35,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:35,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 11:03:35,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 11:03:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 11:03:35,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:35,704 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-30 11:03:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:36,087 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 11:03:36,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 11:03:36,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 11:03:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:36,088 INFO L225 Difference]: With dead ends: 69 [2018-09-30 11:03:36,088 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 11:03:36,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 11:03:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 11:03:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 11:03:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-30 11:03:36,093 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-30 11:03:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:36,093 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-30 11:03:36,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 11:03:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-30 11:03:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 11:03:36,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:36,094 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-30 11:03:36,094 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:36,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-30 11:03:36,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:36,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:36,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:36,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:36,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:36,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:36,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:36,794 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:03:36,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:03:36,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:36,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:37,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:37,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 11:03:37,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 11:03:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 11:03:37,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:37,089 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-30 11:03:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:43,189 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 11:03:43,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 11:03:43,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-30 11:03:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:43,190 INFO L225 Difference]: With dead ends: 101 [2018-09-30 11:03:43,190 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 11:03:43,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 11:03:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-30 11:03:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 11:03:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-30 11:03:43,196 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-30 11:03:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:43,196 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-30 11:03:43,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 11:03:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-30 11:03:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 11:03:43,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:43,197 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-30 11:03:43,197 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:43,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-30 11:03:43,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:43,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:43,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:43,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:43,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:43,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:43,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:43,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:03:43,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-30 11:03:43,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:43,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:43,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:43,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 11:03:43,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 11:03:43,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 11:03:43,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:43,951 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-30 11:03:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:45,513 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-30 11:03:45,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 11:03:45,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 11:03:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:45,514 INFO L225 Difference]: With dead ends: 102 [2018-09-30 11:03:45,514 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 11:03:45,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 11:03:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 11:03:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 11:03:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 11:03:45,519 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-30 11:03:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:45,519 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 11:03:45,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 11:03:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 11:03:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 11:03:45,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:45,520 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-30 11:03:45,520 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:45,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-30 11:03:45,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:45,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:45,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:45,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:45,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:45,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:45,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:45,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:03:45,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-30 11:03:45,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:45,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:45,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:45,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 11:03:45,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 11:03:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 11:03:45,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:45,942 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-30 11:03:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:46,328 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 11:03:46,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 11:03:46,328 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 11:03:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:46,329 INFO L225 Difference]: With dead ends: 71 [2018-09-30 11:03:46,329 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 11:03:46,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 11:03:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 11:03:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 11:03:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-30 11:03:46,335 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-30 11:03:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:46,335 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-30 11:03:46,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 11:03:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-30 11:03:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 11:03:46,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:46,336 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-30 11:03:46,336 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:46,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-30 11:03:46,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:46,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:46,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:46,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:46,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:47,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:47,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:47,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:47,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:47,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:47,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 11:03:47,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 11:03:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 11:03:47,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:47,328 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-30 11:03:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:53,836 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-30 11:03:53,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 11:03:53,836 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-30 11:03:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:53,837 INFO L225 Difference]: With dead ends: 104 [2018-09-30 11:03:53,837 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 11:03:53,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 11:03:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-30 11:03:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 11:03:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 11:03:53,842 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-30 11:03:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:53,842 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 11:03:53,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 11:03:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 11:03:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 11:03:53,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:53,843 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-30 11:03:53,843 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:53,843 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-30 11:03:53,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:53,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:53,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:53,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:53,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:54,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:54,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:54,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:03:54,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:03:54,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:54,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:54,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:54,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 11:03:54,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 11:03:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 11:03:54,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:54,667 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-30 11:03:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:56,140 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-30 11:03:56,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 11:03:56,140 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 11:03:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:56,141 INFO L225 Difference]: With dead ends: 105 [2018-09-30 11:03:56,141 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 11:03:56,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 11:03:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 11:03:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 11:03:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 11:03:56,146 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-30 11:03:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:56,146 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 11:03:56,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 11:03:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 11:03:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 11:03:56,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:56,147 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-30 11:03:56,147 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:56,147 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-30 11:03:56,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:56,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:56,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:56,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:56,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:56,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:56,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:56,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:03:56,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 11:03:56,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:56,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:56,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:56,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 11:03:56,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 11:03:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 11:03:56,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:56,833 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-30 11:03:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:57,241 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 11:03:57,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 11:03:57,241 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 11:03:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:57,242 INFO L225 Difference]: With dead ends: 73 [2018-09-30 11:03:57,242 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 11:03:57,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 11:03:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 11:03:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 11:03:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-30 11:03:57,246 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-30 11:03:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:57,246 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-30 11:03:57,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 11:03:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-30 11:03:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 11:03:57,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:57,247 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-30 11:03:57,247 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:57,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-30 11:03:57,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:57,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:57,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:57,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:57,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:57,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:57,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:57,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:03:58,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:03:58,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:58,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:58,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:58,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 11:03:58,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 11:03:58,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 11:03:58,261 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:58,261 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-30 11:04:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:05,166 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-30 11:04:05,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 11:04:05,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-30 11:04:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:05,167 INFO L225 Difference]: With dead ends: 107 [2018-09-30 11:04:05,167 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 11:04:05,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 11:04:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-30 11:04:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 11:04:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-30 11:04:05,172 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-30 11:04:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:05,172 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-30 11:04:05,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 11:04:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-30 11:04:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 11:04:05,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:05,173 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-30 11:04:05,173 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:05,173 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:05,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-30 11:04:05,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:05,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:05,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:05,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:05,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:05,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:05,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:05,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:04:05,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 11:04:05,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:05,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:05,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:05,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 11:04:05,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 11:04:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 11:04:05,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:05,550 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-30 11:04:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:07,135 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 11:04:07,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 11:04:07,135 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 11:04:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:07,136 INFO L225 Difference]: With dead ends: 108 [2018-09-30 11:04:07,136 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 11:04:07,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 11:04:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 11:04:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 11:04:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-30 11:04:07,142 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-30 11:04:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:07,142 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-30 11:04:07,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 11:04:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-30 11:04:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 11:04:07,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:07,143 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-30 11:04:07,143 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:07,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:07,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-30 11:04:07,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:07,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:07,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:07,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:07,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:07,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:07,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:07,405 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:04:07,449 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 11:04:07,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:07,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:07,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:07,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 11:04:07,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 11:04:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 11:04:07,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:07,592 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-30 11:04:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:08,008 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 11:04:08,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 11:04:08,008 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 11:04:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:08,009 INFO L225 Difference]: With dead ends: 75 [2018-09-30 11:04:08,009 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 11:04:08,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 11:04:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 11:04:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 11:04:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-30 11:04:08,013 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-30 11:04:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:08,014 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-30 11:04:08,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 11:04:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-30 11:04:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 11:04:08,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:08,014 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-30 11:04:08,014 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:08,014 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-30 11:04:08,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:08,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:08,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:08,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:08,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:08,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:08,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:08,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:08,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:09,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:09,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 11:04:09,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 11:04:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 11:04:09,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:09,034 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-30 11:04:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:16,364 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-30 11:04:16,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 11:04:16,364 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-30 11:04:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:16,365 INFO L225 Difference]: With dead ends: 110 [2018-09-30 11:04:16,365 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 11:04:16,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 11:04:16,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-30 11:04:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 11:04:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-30 11:04:16,370 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-30 11:04:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:16,370 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-30 11:04:16,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 11:04:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-30 11:04:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 11:04:16,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:16,371 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-30 11:04:16,371 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:16,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-30 11:04:16,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:16,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:16,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:16,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:16,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:16,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:16,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:16,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:04:16,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:04:16,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:16,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:16,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:16,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 11:04:16,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 11:04:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 11:04:16,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:16,836 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-30 11:04:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:18,526 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-30 11:04:18,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 11:04:18,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 11:04:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:18,527 INFO L225 Difference]: With dead ends: 111 [2018-09-30 11:04:18,527 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 11:04:18,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 11:04:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 11:04:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 11:04:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 11:04:18,532 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-30 11:04:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:18,532 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 11:04:18,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 11:04:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 11:04:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 11:04:18,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:18,533 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-30 11:04:18,533 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:18,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-30 11:04:18,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:18,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:18,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:18,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:18,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:18,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:18,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:18,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:04:18,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 11:04:18,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:18,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:19,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:19,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 11:04:19,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 11:04:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 11:04:19,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:19,031 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-30 11:04:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:19,454 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 11:04:19,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 11:04:19,455 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 11:04:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:19,455 INFO L225 Difference]: With dead ends: 77 [2018-09-30 11:04:19,455 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 11:04:19,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 11:04:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 11:04:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 11:04:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-30 11:04:19,460 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-30 11:04:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:19,460 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-30 11:04:19,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 11:04:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-30 11:04:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 11:04:19,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:19,461 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-30 11:04:19,461 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:19,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-30 11:04:19,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:19,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:19,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:19,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:19,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:20,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:20,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:20,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:04:20,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:04:20,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:20,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:20,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:20,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 11:04:20,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 11:04:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 11:04:20,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:20,451 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-30 11:04:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:28,212 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 11:04:28,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 11:04:28,213 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-30 11:04:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:28,214 INFO L225 Difference]: With dead ends: 113 [2018-09-30 11:04:28,214 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 11:04:28,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 11:04:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-30 11:04:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 11:04:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 11:04:28,218 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-30 11:04:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:28,219 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 11:04:28,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 11:04:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 11:04:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 11:04:28,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:28,219 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-30 11:04:28,219 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:28,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-30 11:04:28,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:28,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:28,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:28,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:28,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:28,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:28,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:28,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:04:28,558 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 11:04:28,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:28,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:28,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:28,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 11:04:28,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 11:04:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 11:04:28,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:28,936 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-30 11:04:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:30,808 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-30 11:04:30,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 11:04:30,808 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 11:04:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:30,809 INFO L225 Difference]: With dead ends: 114 [2018-09-30 11:04:30,809 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 11:04:30,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 11:04:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 11:04:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 11:04:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 11:04:30,815 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-30 11:04:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:30,815 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 11:04:30,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 11:04:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 11:04:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 11:04:30,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:30,816 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-30 11:04:30,816 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:30,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-30 11:04:30,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:30,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:30,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:30,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:30,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:31,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:31,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:31,094 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:04:31,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 11:04:31,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:31,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:31,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:31,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 11:04:31,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 11:04:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 11:04:31,295 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:31,295 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-30 11:04:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:31,812 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 11:04:31,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 11:04:31,812 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 11:04:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:31,813 INFO L225 Difference]: With dead ends: 79 [2018-09-30 11:04:31,813 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 11:04:31,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 11:04:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 11:04:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 11:04:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-30 11:04:31,819 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-30 11:04:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:31,820 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-30 11:04:31,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 11:04:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-30 11:04:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 11:04:31,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:31,820 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-30 11:04:31,821 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:31,821 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:31,821 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-30 11:04:31,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:31,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:31,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:31,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:31,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:32,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:32,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:32,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:33,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:33,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:33,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 11:04:33,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 11:04:33,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 11:04:33,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:33,192 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-30 11:04:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:41,434 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 11:04:41,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 11:04:41,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-30 11:04:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:41,435 INFO L225 Difference]: With dead ends: 116 [2018-09-30 11:04:41,436 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 11:04:41,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 11:04:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-30 11:04:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 11:04:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-30 11:04:41,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-30 11:04:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:41,442 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-30 11:04:41,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 11:04:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-30 11:04:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 11:04:41,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:41,443 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-30 11:04:41,443 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:41,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-30 11:04:41,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:41,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:41,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:41,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:41,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:41,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:41,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:41,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:04:41,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:04:41,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:41,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:41,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:41,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 11:04:41,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 11:04:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 11:04:41,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:41,914 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-30 11:04:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:43,896 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-30 11:04:43,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 11:04:43,896 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 11:04:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:43,897 INFO L225 Difference]: With dead ends: 117 [2018-09-30 11:04:43,897 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 11:04:43,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 11:04:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 11:04:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 11:04:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 11:04:43,903 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-30 11:04:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:43,903 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 11:04:43,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 11:04:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 11:04:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 11:04:43,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:43,903 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-30 11:04:43,904 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:43,904 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:43,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-30 11:04:43,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:43,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:43,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:43,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:43,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:44,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:44,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:44,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:04:44,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-30 11:04:44,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:44,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:44,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:44,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 11:04:44,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 11:04:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 11:04:44,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:44,405 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-30 11:04:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:44,867 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 11:04:44,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 11:04:44,867 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 11:04:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:44,868 INFO L225 Difference]: With dead ends: 81 [2018-09-30 11:04:44,868 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 11:04:44,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 11:04:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 11:04:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 11:04:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-30 11:04:44,873 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-30 11:04:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:44,873 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-30 11:04:44,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 11:04:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-30 11:04:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 11:04:44,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:44,874 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-30 11:04:44,874 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:44,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:44,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-30 11:04:44,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:44,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:44,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:46,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:46,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:46,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:04:46,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:04:46,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:46,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:46,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:46,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 11:04:46,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 11:04:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 11:04:46,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:46,382 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-30 11:04:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:55,042 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-30 11:04:55,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 11:04:55,043 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-30 11:04:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:55,043 INFO L225 Difference]: With dead ends: 119 [2018-09-30 11:04:55,043 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 11:04:55,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 11:04:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-30 11:04:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 11:04:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 11:04:55,050 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-30 11:04:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:55,050 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 11:04:55,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 11:04:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 11:04:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 11:04:55,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:55,051 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-30 11:04:55,051 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:55,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-30 11:04:55,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:55,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:55,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:55,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:55,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:55,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:55,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:55,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:04:55,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-30 11:04:55,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:55,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:55,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:55,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 11:04:55,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 11:04:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 11:04:55,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:55,809 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-30 11:04:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:57,906 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-30 11:04:57,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 11:04:57,907 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 11:04:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:57,907 INFO L225 Difference]: With dead ends: 120 [2018-09-30 11:04:57,907 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 11:04:57,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 11:04:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 11:04:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 11:04:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-30 11:04:57,911 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-30 11:04:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:57,912 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-30 11:04:57,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 11:04:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-30 11:04:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 11:04:57,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:57,912 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-30 11:04:57,913 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:57,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-30 11:04:57,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:57,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:57,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:57,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:57,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:58,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:58,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:58,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:04:58,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 11:04:58,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:58,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:58,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:58,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 11:04:58,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 11:04:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 11:04:58,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:58,411 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-30 11:04:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:58,871 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-30 11:04:58,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 11:04:58,871 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 11:04:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:58,871 INFO L225 Difference]: With dead ends: 83 [2018-09-30 11:04:58,871 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 11:04:58,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 11:04:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 11:04:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 11:04:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-30 11:04:58,877 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-30 11:04:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:58,877 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-30 11:04:58,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 11:04:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-30 11:04:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 11:04:58,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:58,878 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-30 11:04:58,878 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:58,878 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-30 11:04:58,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:58,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:58,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:58,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:58,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:59,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:59,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:59,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:04:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:59,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:05:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:00,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:05:00,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 11:05:00,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 11:05:00,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 11:05:00,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:05:00,023 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-30 11:05:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:05:09,160 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-30 11:05:09,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 11:05:09,160 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-30 11:05:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:05:09,161 INFO L225 Difference]: With dead ends: 122 [2018-09-30 11:05:09,161 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 11:05:09,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:05:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 11:05:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-30 11:05:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 11:05:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-30 11:05:09,168 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-30 11:05:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:05:09,168 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-30 11:05:09,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 11:05:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-30 11:05:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 11:05:09,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:05:09,169 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-30 11:05:09,169 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:05:09,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:05:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-30 11:05:09,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:05:09,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:05:09,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:05:09,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:05:09,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:05:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:05:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:09,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:05:09,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:05:09,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:05:09,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:05:09,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:05:09,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:05:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:09,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:05:09,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 11:05:09,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 11:05:09,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 11:05:09,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:05:09,676 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-30 11:05:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:05:11,526 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-30 11:05:11,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 11:05:11,527 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 11:05:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:05:11,527 INFO L225 Difference]: With dead ends: 123 [2018-09-30 11:05:11,527 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 11:05:11,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:05:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 11:05:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 11:05:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 11:05:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 11:05:11,532 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-30 11:05:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:05:11,533 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 11:05:11,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 11:05:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 11:05:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 11:05:11,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:05:11,533 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-30 11:05:11,533 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:05:11,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:05:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-30 11:05:11,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:05:11,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:05:11,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:05:11,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:05:11,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:05:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:05:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:11,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:05:11,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:05:11,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:05:11,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 11:05:11,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:05:11,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:05:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:12,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:05:12,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 11:05:12,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 11:05:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 11:05:12,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:05:12,042 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-30 11:05:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:05:12,513 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 11:05:12,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 11:05:12,513 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 11:05:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:05:12,513 INFO L225 Difference]: With dead ends: 85 [2018-09-30 11:05:12,514 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 11:05:12,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:05:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 11:05:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 11:05:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 11:05:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-30 11:05:12,517 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-30 11:05:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:05:12,518 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-30 11:05:12,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 11:05:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-30 11:05:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 11:05:12,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:05:12,518 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-30 11:05:12,519 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:05:12,519 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:05:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-30 11:05:12,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:05:12,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:05:12,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:05:12,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:05:12,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:05:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:05:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:13,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:05:13,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:05:13,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:05:13,570 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:05:13,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:05:13,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:05:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:05:13,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:05:13,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 11:05:13,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 11:05:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 11:05:13,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:05:13,727 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. Received shutdown request... [2018-09-30 11:05:16,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 11:05:16,923 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 11:05:16,930 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 11:05:16,930 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:05:16 BoogieIcfgContainer [2018-09-30 11:05:16,931 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 11:05:16,931 INFO L168 Benchmark]: Toolchain (without parser) took 236166.42 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -72.9 MB). Free memory was 1.5 GB in the beginning and 916.8 MB in the end (delta: 534.7 MB). Peak memory consumption was 461.8 MB. Max. memory is 7.1 GB. [2018-09-30 11:05:16,933 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:05:16,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:05:16,934 INFO L168 Benchmark]: Boogie Preprocessor took 21.48 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. [2018-09-30 11:05:16,934 INFO L168 Benchmark]: RCFGBuilder took 238.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 11:05:16,935 INFO L168 Benchmark]: TraceAbstraction took 235855.62 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -72.9 MB). Free memory was 1.4 GB in the beginning and 916.8 MB in the end (delta: 513.5 MB). Peak memory consumption was 440.7 MB. Max. memory is 7.1 GB. [2018-09-30 11:05:16,937 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 0.21 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 44.47 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 21.48 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 238.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235855.62 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -72.9 MB). Free memory was 1.4 GB in the beginning and 916.8 MB in the end (delta: 513.5 MB). Peak memory consumption was 440.7 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 29 states, 41 states before enhancement), while ReachableStatesComputation was computing reachable states (27 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 29 states, 41 states before enhancement), while ReachableStatesComputation was computing reachable states (27 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 235.7s OverallTime, 115 OverallIterations, 38 TraceHistogramMax, 170.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 460 SDtfs, 840 SDslu, 2936 SDs, 0 SdLazy, 52899 SolverSat, 968 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.6s 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: 0.5s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 55.8s 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-0-2018-09-30_11-05-16-948.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-0-2018-09-30_11-05-16-948.csv Completed graceful shutdown