java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:32:21,993 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:32:21,996 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:32:22,008 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:32:22,009 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:32:22,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:32:22,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:32:22,013 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:32:22,014 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:32:22,015 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:32:22,016 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:32:22,051 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:32:22,077 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:32:22,077 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:32:22,078 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:32:22,078 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:32:22,079 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:32:22,079 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:32:22,079 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:32:22,080 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:32:22,080 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:32:22,080 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:32:22,080 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:32:22,080 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:32:22,080 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:32:22,081 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:32:22,081 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:32:22,081 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:32:22,081 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:32:22,081 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:32:22,082 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:32:22,082 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:32:22,082 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:32:22,082 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:32:22,082 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:32:22,083 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:32:22,083 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:32:22,083 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:32:22,083 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:32:22,083 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:32:22,083 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:32:22,084 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:32:22,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:32:22,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:32:22,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:32:22,150 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:32:22,151 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:32:22,154 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-30 10:32:22,154 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-30 10:32:22,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:32:22,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:32:22,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:32:22,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:32:22,202 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:32:22,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,240 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:32:22,240 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:32:22,241 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:32:22,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:32:22,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:32:22,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:32:22,244 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:32:22,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/1) ... [2018-09-30 10:32:22,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:32:22,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:32:22,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:32:22,268 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:32:22,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (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 10:32:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:32:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:32:22,541 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:32:22,541 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:32:22 BoogieIcfgContainer [2018-09-30 10:32:22,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:32:22,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:32:22,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:32:22,546 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:32:22,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:32:22" (1/2) ... [2018-09-30 10:32:22,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3bb658 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:32:22, skipping insertion in model container [2018-09-30 10:32:22,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:32:22" (2/2) ... [2018-09-30 10:32:22,550 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-30 10:32:22,559 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:32:22,566 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:32:22,611 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:32:22,612 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:32:22,612 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:32:22,612 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:32:22,612 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:32:22,613 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:32:22,613 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:32:22,613 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:32:22,613 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:32:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:32:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:32:22,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:22,636 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:32:22,638 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:22,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 10:32:22,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:22,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:22,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:22,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:22,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:22,806 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 10:32:22,809 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:32:22,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:32:22,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:32:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:32:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:32:22,826 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:32:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:22,891 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:32:22,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:32:22,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:32:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:22,904 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:32:22,904 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:32:22,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:32:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:32:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:32:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:32:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:32:22,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 10:32:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:22,952 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:32:22,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:32:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:32:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:32:22,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:22,953 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:32:22,953 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:22,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 10:32:22,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:22,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:22,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:22,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:22,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:23,080 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 10:32:23,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:23,081 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 10:32:23,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:23,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:23,440 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 10:32:23,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:23,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 10:32:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:32:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:32:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:32:23,478 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 10:32:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:23,573 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:32:23,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:32:23,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 10:32:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:23,574 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:32:23,574 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:32:23,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:32:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:32:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:32:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:32:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:32:23,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 10:32:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:23,578 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:32:23,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:32:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:32:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:32:23,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:23,580 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 10:32:23,580 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:23,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 10:32:23,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:23,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:23,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:23,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:23,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:23,687 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 10:32:23,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:23,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:23,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:23,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:23,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:23,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:23,895 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 10:32:23,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:23,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 10:32:23,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:32:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:32:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:32:23,918 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 10:32:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:24,050 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:32:24,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:32:24,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 10:32:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:24,051 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:32:24,051 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:32:24,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:32:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:32:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:32:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:32:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:32:24,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 10:32:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:24,056 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:32:24,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:32:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:32:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:32:24,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:24,057 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 10:32:24,058 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:24,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 10:32:24,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:24,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:24,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:24,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:24,256 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 10:32:24,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:24,258 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 10:32:24,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:24,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:32:24,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:24,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:24,380 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 10:32:24,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:24,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 10:32:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:32:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:32:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:32:24,402 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 10:32:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:24,447 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:32:24,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:32:24,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 10:32:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:24,450 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:32:24,450 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:32:24,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:32:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:32:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:32:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:32:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:32:24,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 10:32:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:24,456 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:32:24,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:32:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:32:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:32:24,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:24,457 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 10:32:24,457 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:24,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 10:32:24,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:24,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:24,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:24,633 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 10:32:24,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:24,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:24,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:24,651 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:24,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:24,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:24,782 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 10:32:24,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:24,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 10:32:24,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:32:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:32:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:32:24,804 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 10:32:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:24,871 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:32:24,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:32:24,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 10:32:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:24,872 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:32:24,872 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:32:24,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:32:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:32:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:32:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:32:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:32:24,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 10:32:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:24,877 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:32:24,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:32:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:32:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:32:24,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:24,878 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 10:32:24,879 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:24,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 10:32:24,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:24,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:24,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:25,307 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 10:32:25,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:25,307 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 10:32:25,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:25,344 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:32:25,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:25,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:25,474 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 10:32:25,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:25,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 10:32:25,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:32:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:32:25,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:32:25,497 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 10:32:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:25,588 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:32:25,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:32:25,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:32:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:25,591 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:32:25,591 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:32:25,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:32:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:32:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:32:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:32:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:32:25,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 10:32:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:25,596 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:32:25,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:32:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:32:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:32:25,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:25,598 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 10:32:25,598 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:25,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 10:32:25,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:25,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:25,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:25,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:25,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:25,733 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 10:32:25,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:25,734 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 10:32:25,743 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:25,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:32:25,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:25,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:25,888 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 10:32:25,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:25,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 10:32:25,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:32:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:32:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:32:25,915 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 10:32:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:25,970 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:32:25,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:32:25,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 10:32:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:25,971 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:32:25,972 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:32:25,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:32:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:32:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:32:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:32:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:32:25,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 10:32:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:25,978 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:32:25,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:32:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:32:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:32:25,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:25,979 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 10:32:25,979 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:25,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 10:32:25,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:25,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:25,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:25,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:25,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:26,165 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 10:32:26,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:26,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:32:26,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:26,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:26,458 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 10:32:26,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:26,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 10:32:26,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:32:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:32:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:32:26,485 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 10:32:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:26,549 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:32:26,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:32:26,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 10:32:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:26,550 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:32:26,550 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:32:26,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:32:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:32:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:32:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:32:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:32:26,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 10:32:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:26,556 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:32:26,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:32:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:32:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:32:26,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:26,557 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 10:32:26,557 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:26,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 10:32:26,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:26,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:26,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:26,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:26,687 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 10:32:26,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:26,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:26,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:26,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:26,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:26,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:26,875 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 10:32:26,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:26,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 10:32:26,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:32:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:32:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:32:26,898 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 10:32:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:26,969 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:32:26,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:32:26,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 10:32:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:26,972 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:32:26,972 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:32:26,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:32:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:32:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:32:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:32:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:32:26,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 10:32:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:26,976 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:32:26,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:32:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:32:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:32:26,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:26,977 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 10:32:26,978 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:26,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:26,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 10:32:26,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:26,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:26,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:26,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:27,123 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 10:32:27,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:27,124 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 10:32:27,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:27,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:32:27,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:27,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:27,382 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 10:32:27,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:27,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 10:32:27,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:32:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:32:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:32:27,404 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 10:32:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:27,682 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:32:27,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:32:27,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 10:32:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:27,684 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:32:27,684 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:32:27,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:32:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:32:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:32:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:32:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:32:27,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 10:32:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:27,689 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:32:27,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:32:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:32:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:32:27,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:27,690 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 10:32:27,691 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:27,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 10:32:27,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:27,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:27,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:27,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:27,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:27,975 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 10:32:27,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:27,975 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 10:32:27,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:27,996 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:27,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:27,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:28,205 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 10:32:28,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:28,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 10:32:28,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:32:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:32:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:32:28,229 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 10:32:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:28,578 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:32:28,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:32:28,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 10:32:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:28,580 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:32:28,580 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:32:28,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:32:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:32:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:32:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:32:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:32:28,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 10:32:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:28,586 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:32:28,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:32:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:32:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:32:28,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:28,588 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 10:32:28,588 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:28,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 10:32:28,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:28,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:28,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:28,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:28,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:28,744 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 10:32:28,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:28,744 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 10:32:28,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:28,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:32:28,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:28,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:29,265 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 10:32:29,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:29,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 10:32:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:32:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:32:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:32:29,288 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 10:32:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:29,374 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:32:29,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:32:29,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 10:32:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:29,376 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:32:29,376 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:32:29,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:32:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:32:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:32:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:32:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:32:29,382 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 10:32:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:29,382 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:32:29,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:32:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:32:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:32:29,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:29,383 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 10:32:29,383 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:29,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:29,383 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 10:32:29,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:29,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:29,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:29,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:29,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:29,725 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 10:32:29,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:29,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:32:29,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:29,770 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:32:29,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:29,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:30,050 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 10:32:30,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:30,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 10:32:30,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:32:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:32:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:32:30,073 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 10:32:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:30,162 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:32:30,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:32:30,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 10:32:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:30,163 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:32:30,164 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:32:30,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:32:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:32:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:32:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:32:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:32:30,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 10:32:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:30,170 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:32:30,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:32:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:32:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:32:30,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:30,171 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 10:32:30,171 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:30,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:30,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 10:32:30,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:30,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:30,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:30,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:30,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:30,393 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 10:32:30,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:30,393 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 10:32:30,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:30,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:30,796 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 10:32:30,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:30,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 10:32:30,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:32:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:32:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:32:30,817 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 10:32:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:30,894 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:32:30,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:32:30,895 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 10:32:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:30,895 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:32:30,895 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:32:30,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:32:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:32:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:32:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:32:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:32:30,900 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 10:32:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:30,901 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:32:30,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:32:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:32:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:32:30,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:30,902 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 10:32:30,902 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:30,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 10:32:30,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:30,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:30,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:30,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:30,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:31,116 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 10:32:31,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:31,116 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 10:32:31,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:31,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:31,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:31,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:31,473 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 10:32:31,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:31,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 10:32:31,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:32:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:32:31,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:32:31,495 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 10:32:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:31,626 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:32:31,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:32:31,627 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 10:32:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:31,628 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:32:31,628 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:32:31,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:32:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:32:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:32:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:32:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:32:31,633 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 10:32:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:31,633 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:32:31,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:32:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:32:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:32:31,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:31,634 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 10:32:31,635 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:31,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 10:32:31,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:31,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:31,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:31,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:31,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:31,830 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 10:32:31,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:31,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:31,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:32,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:32:32,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:32,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:32,410 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 10:32:32,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:32,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 10:32:32,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:32:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:32:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:32:32,432 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 10:32:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:32,557 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:32:32,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:32:32,558 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 10:32:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:32,559 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:32:32,559 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:32:32,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:32:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:32:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:32:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:32:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:32:32,565 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 10:32:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:32,565 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:32:32,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:32:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:32:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:32:32,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:32,566 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 10:32:32,567 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:32,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 10:32:32,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:32,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:32,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:32,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:32,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:32,787 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 10:32:32,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:32,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:32,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:32,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:32,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:32,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:33,231 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 10:32:33,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:33,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 10:32:33,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:32:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:32:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:32:33,254 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 10:32:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:33,328 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:32:33,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:32:33,329 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 10:32:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:33,330 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:32:33,330 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:32:33,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:32:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:32:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:32:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:32:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:32:33,335 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 10:32:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:33,335 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:32:33,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:32:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:32:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:32:33,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:33,336 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 10:32:33,337 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:33,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 10:32:33,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:33,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:33,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:33,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:33,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:33,781 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 10:32:33,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:33,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:33,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:33,813 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:32:33,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:33,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:34,251 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 10:32:34,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:34,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 10:32:34,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:32:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:32:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:32:34,274 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 10:32:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:34,609 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:32:34,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:32:34,610 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 10:32:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:34,611 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:32:34,611 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:32:34,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:32:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:32:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:32:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:32:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:32:34,618 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 10:32:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:34,619 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:32:34,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:32:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:32:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:32:34,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:34,620 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 10:32:34,620 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:34,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 10:32:34,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:34,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:34,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:34,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:34,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:34,955 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 10:32:34,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:34,956 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 10:32:34,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:34,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:32:34,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:34,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:35,732 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 10:32:35,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:35,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 10:32:35,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:32:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:32:35,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:32:35,753 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 10:32:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:35,835 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:32:35,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:32:35,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 10:32:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:35,836 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:32:35,837 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:32:35,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:32:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:32:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:32:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:32:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:32:35,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 10:32:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:35,843 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:32:35,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:32:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:32:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:32:35,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:35,844 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 10:32:35,844 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:35,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 10:32:35,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:35,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:35,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:35,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:35,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:36,120 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 10:32:36,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:36,121 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 10:32:36,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:36,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:36,967 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 10:32:36,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:36,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 10:32:36,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:32:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:32:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:32:36,990 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 10:32:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:37,119 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:32:37,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:32:37,119 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 10:32:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:37,120 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:32:37,120 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:32:37,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:32:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:32:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:32:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:32:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:32:37,126 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 10:32:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:37,127 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:32:37,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:32:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:32:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:32:37,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:37,128 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 10:32:37,128 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:37,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 10:32:37,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:37,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:37,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:37,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:37,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:37,997 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 10:32:37,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:37,998 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 10:32:38,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:38,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:38,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:38,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:38,494 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 10:32:38,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:38,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 10:32:38,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:32:38,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:32:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:32:38,518 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 10:32:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:38,628 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:32:38,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:32:38,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 10:32:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:38,630 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:32:38,630 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:32:38,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:32:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:32:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:32:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:32:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:32:38,636 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 10:32:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:38,636 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:32:38,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:32:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:32:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:32:38,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:38,638 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 10:32:38,638 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:38,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 10:32:38,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:38,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:38,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:38,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:38,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:39,597 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 10:32:39,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:39,598 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 10:32:39,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:39,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:32:39,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:39,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:40,521 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 10:32:40,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:40,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 10:32:40,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:32:40,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:32:40,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:32:40,543 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 10:32:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:40,687 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:32:40,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:32:40,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 10:32:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:40,691 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:32:40,691 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:32:40,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:32:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:32:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:32:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:32:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:32:40,696 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 10:32:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:40,696 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:32:40,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:32:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:32:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:32:40,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:40,698 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 10:32:40,698 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:40,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:40,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 10:32:40,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:40,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:40,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:40,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:40,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:41,113 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 10:32:41,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:41,113 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 10:32:41,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:41,138 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:41,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:41,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:41,661 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 10:32:41,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:41,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 10:32:41,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:32:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:32:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:32:41,683 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 10:32:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:41,780 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:32:41,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:32:41,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 10:32:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:41,781 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:32:41,782 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:32:41,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:32:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:32:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:32:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:32:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:32:41,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 10:32:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:41,789 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:32:41,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:32:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:32:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:32:41,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:41,790 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 10:32:41,790 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:41,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 10:32:41,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:41,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:41,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:42,209 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 10:32:42,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:42,210 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 10:32:42,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:42,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:32:42,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:42,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:42,722 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 10:32:42,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:42,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 10:32:42,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:32:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:32:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:32:42,744 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 10:32:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:42,875 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:32:42,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:32:42,876 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 10:32:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:42,876 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:32:42,877 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:32:42,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:32:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:32:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:32:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:32:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:32:42,882 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 10:32:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:42,883 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:32:42,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:32:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:32:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:32:42,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:42,884 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 10:32:42,884 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:42,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 10:32:42,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:42,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:42,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:43,512 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 10:32:43,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:43,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:43,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:43,543 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:32:43,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:43,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:43,994 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 10:32:44,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:44,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 10:32:44,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:32:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:32:44,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:32:44,016 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 10:32:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:44,176 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:32:44,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:32:44,177 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 10:32:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:44,178 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:32:44,178 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:32:44,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:32:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:32:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:32:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:32:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:32:44,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 10:32:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:44,184 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:32:44,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:32:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:32:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:32:44,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:44,185 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 10:32:44,185 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:44,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 10:32:44,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:44,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:44,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:44,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:44,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:44,589 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 10:32:44,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:44,589 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 10:32:44,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:44,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:45,070 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 10:32:45,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:45,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 10:32:45,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:32:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:32:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:32:45,092 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 10:32:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:45,228 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:32:45,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:32:45,229 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 10:32:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:45,230 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:32:45,230 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:32:45,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:32:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:32:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:32:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:32:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:32:45,237 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 10:32:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:45,237 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:32:45,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:32:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:32:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:32:45,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:45,238 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 10:32:45,239 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:45,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:45,239 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 10:32:45,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:45,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:45,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:45,654 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 10:32:45,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:45,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:45,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:45,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:45,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:45,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:46,186 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 10:32:46,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:46,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 10:32:46,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:32:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:32:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:32:46,209 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 10:32:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:46,348 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:32:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:32:46,349 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 10:32:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:46,349 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:32:46,350 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:32:46,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:32:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:32:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:32:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:32:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:32:46,356 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 10:32:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:46,356 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:32:46,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:32:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:32:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:32:46,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:46,357 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 10:32:46,357 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:46,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 10:32:46,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:46,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:46,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:46,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:46,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:47,337 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 10:32:47,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:47,337 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 10:32:47,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:47,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:32:47,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:47,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:47,894 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 10:32:47,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:47,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 10:32:47,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:32:47,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:32:47,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:32:47,917 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 10:32:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:48,051 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:32:48,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:32:48,051 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 10:32:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:48,052 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:32:48,052 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:32:48,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:32:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:32:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:32:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:32:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:32:48,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 10:32:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:48,057 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:32:48,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:32:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:32:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:32:48,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:48,058 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 10:32:48,058 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:48,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 10:32:48,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:48,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:48,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:48,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:48,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:48,720 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 10:32:48,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:48,720 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 10:32:48,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:48,775 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:48,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:48,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:50,014 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 10:32:50,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:50,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 10:32:50,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:32:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:32:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:32:50,038 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 10:32:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:50,264 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:32:50,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:32:50,265 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 10:32:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:50,265 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:32:50,266 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:32:50,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:32:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:32:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:32:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:32:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:32:50,270 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 10:32:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:50,271 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:32:50,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:32:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:32:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:32:50,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:50,272 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 10:32:50,272 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:50,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 10:32:50,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:50,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:50,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:50,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:50,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:50,788 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 10:32:50,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:50,789 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 10:32:50,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:50,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:32:50,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:50,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:51,422 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 10:32:51,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:51,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 10:32:51,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:32:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:32:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:32:51,445 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 10:32:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:51,603 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:32:51,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:32:51,604 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 10:32:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:51,604 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:32:51,605 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:32:51,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:32:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:32:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:32:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:32:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:32:51,609 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 10:32:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:51,609 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:32:51,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:32:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:32:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:32:51,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:51,610 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 10:32:51,610 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:51,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 10:32:51,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:51,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:51,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:52,193 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 10:32:52,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:52,194 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 10:32:52,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:52,235 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:32:52,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:52,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:52,859 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 10:32:52,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:52,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 10:32:52,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:32:52,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:32:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:32:52,882 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 10:32:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:53,000 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:32:53,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:32:53,001 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 10:32:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:53,002 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:32:53,002 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:32:53,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:32:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:32:53,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:32:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:32:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:32:53,007 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 10:32:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:53,007 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:32:53,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:32:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:32:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:32:53,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:53,008 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 10:32:53,008 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:53,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 10:32:53,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:53,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:53,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:53,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:53,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:53,904 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 10:32:53,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:53,905 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 10:32:53,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:53,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:54,567 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 10:32:54,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:54,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 10:32:54,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:32:54,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:32:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:32:54,589 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 10:32:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:54,738 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:32:54,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:32:54,738 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 10:32:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:54,739 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:32:54,739 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:32:54,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:32:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:32:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:32:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:32:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:32:54,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 10:32:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:54,745 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:32:54,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:32:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:32:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:32:54,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:54,745 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 10:32:54,746 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:54,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 10:32:54,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:54,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:54,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:54,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:54,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:55,498 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 10:32:55,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:55,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:55,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:55,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:55,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:55,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:56,237 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 10:32:56,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:56,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 10:32:56,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:32:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:32:56,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:32:56,260 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 10:32:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:56,422 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:32:56,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:32:56,423 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 10:32:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:56,423 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:32:56,423 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:32:56,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:32:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:32:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:32:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:32:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:32:56,427 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 10:32:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:56,427 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:32:56,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:32:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:32:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:32:56,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:56,428 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 10:32:56,428 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:56,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 10:32:56,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:56,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:56,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:56,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:56,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:57,101 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 10:32:57,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:57,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:32:57,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:57,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:32:57,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:57,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:57,938 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 10:32:57,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:57,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 10:32:57,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:32:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:32:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:32:57,959 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 10:32:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:58,157 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:32:58,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:32:58,157 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 10:32:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:58,158 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:32:58,159 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:32:58,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:32:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:32:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:32:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:32:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:32:58,163 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 10:32:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:58,163 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:32:58,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:32:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:32:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:32:58,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:58,164 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 10:32:58,164 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:58,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 10:32:58,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:58,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:58,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:58,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:59,138 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 10:32:59,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:59,138 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 10:32:59,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:59,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:59,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:59,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:59,914 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 10:32:59,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:59,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 10:32:59,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:32:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:32:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:32:59,936 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 10:33:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:00,115 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:33:00,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:33:00,116 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 10:33:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:00,117 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:33:00,117 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:33:00,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:33:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:33:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:33:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:33:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:33:00,122 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 10:33:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:00,122 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:33:00,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:33:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:33:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:33:00,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:00,123 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 10:33:00,123 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:00,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 10:33:00,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:00,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:00,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:00,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:00,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:00,831 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 10:33:00,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:00,832 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 10:33:00,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:00,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:33:00,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:00,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:01,712 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 10:33:01,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:01,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 10:33:01,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:33:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:33:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:33:01,735 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 10:33:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:02,053 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:33:02,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:33:02,054 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 10:33:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:02,055 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:33:02,055 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:33:02,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:33:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:33:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:33:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:33:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:33:02,059 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 10:33:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:02,059 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:33:02,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:33:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:33:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:33:02,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:02,060 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 10:33:02,060 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:02,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 10:33:02,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:02,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:02,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:02,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:02,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:02,866 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 10:33:02,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:02,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:02,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:02,907 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:33:02,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:02,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:04,011 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 10:33:04,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:04,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 10:33:04,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:33:04,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:33:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:33:04,032 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 10:33:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:04,208 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:33:04,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:33:04,208 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 10:33:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:04,209 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:33:04,210 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:33:04,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:33:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:33:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:33:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:33:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:33:04,214 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 10:33:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:04,214 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:33:04,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:33:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:33:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:33:04,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:04,215 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 10:33:04,216 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:04,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 10:33:04,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:04,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:04,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:04,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:05,328 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 10:33:05,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:05,329 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 10:33:05,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:05,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:06,198 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 10:33:06,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:06,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 10:33:06,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:33:06,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:33:06,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:33:06,220 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 10:33:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:06,376 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:33:06,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:33:06,377 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 10:33:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:06,378 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:33:06,378 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:33:06,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:33:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:33:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:33:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:33:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:33:06,382 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 10:33:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:06,382 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:33:06,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:33:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:33:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:33:06,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:06,383 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 10:33:06,383 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:06,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 10:33:06,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:06,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:06,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:06,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:06,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:07,204 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 10:33:07,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:07,204 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 10:33:07,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:07,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:07,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:07,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:08,112 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 10:33:08,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:08,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 10:33:08,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:33:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:33:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:33:08,133 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 10:33:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:08,291 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:33:08,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:33:08,292 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 10:33:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:08,293 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:33:08,293 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:33:08,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:33:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:33:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:33:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:33:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:33:08,297 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 10:33:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:08,297 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:33:08,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:33:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:33:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:33:08,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:08,298 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 10:33:08,298 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:08,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 10:33:08,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:08,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:08,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:08,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:08,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:09,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:09,508 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 10:33:09,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:09,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 10:33:09,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:09,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:10,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 10:33:10,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:33:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:33:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:33:10,537 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 10:33:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:10,717 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:33:10,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:33:10,718 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 10:33:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,719 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:33:10,719 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:33:10,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:33:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:33:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:33:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:33:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:33:10,723 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 10:33:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,723 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:33:10,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:33:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:33:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:33:10,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,724 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 10:33:10,724 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 10:33:10,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:10,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:11,577 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 10:33:11,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:11,608 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:11,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:11,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:12,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 10:33:12,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:33:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:33:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:33:12,671 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 10:33:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,843 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:33:12,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:33:12,844 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 10:33:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,845 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:33:12,845 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:33:12,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:33:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:33:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:33:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:33:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:33:12,850 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 10:33:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,850 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:33:12,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:33:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:33:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:33:12,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,851 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 10:33:12,852 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 10:33:12,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:12,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:13,845 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 10:33:13,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:13,929 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 10:33:13,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:13,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:15,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 10:33:15,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:33:15,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:33:15,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:33:15,192 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 10:33:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:15,383 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:33:15,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:33:15,384 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 10:33:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:15,385 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:33:15,385 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:33:15,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:33:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:33:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:33:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:33:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:33:15,391 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 10:33:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:15,391 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:33:15,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:33:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:33:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:33:15,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:15,392 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 10:33:15,392 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:15,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 10:33:15,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:15,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:15,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:15,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:16,319 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 10:33:16,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:16,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:33:16,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:16,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 10:33:17,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:33:17,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:33:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:33:17,557 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 10:33:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,729 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:33:17,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:33:17,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 10:33:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,731 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:33:17,731 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:33:17,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:33:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:33:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:33:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:33:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:33:17,736 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 10:33:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,736 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:33:17,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:33:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:33:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:33:17,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,737 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 10:33:17,737 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 10:33:17,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:18,728 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 10:33:18,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 10:33:20,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:33:20,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:33:20,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:33:20,139 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 10:33:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,319 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:33:20,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:33:20,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 10:33:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,321 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:33:20,321 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:33:20,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:33:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:33:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:33:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:33:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:33:20,325 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 10:33:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,325 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:33:20,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:33:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:33:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:33:20,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,326 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 10:33:20,326 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 10:33:20,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:21,562 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 10:33:21,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:21,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:21,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:21,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:22,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 10:33:22,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:33:22,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:33:22,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:33:22,823 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 10:33:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,012 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:33:23,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:33:23,013 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 10:33:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,014 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:33:23,014 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:33:23,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:33:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:33:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:33:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:33:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:33:23,019 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 10:33:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,020 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:33:23,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:33:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:33:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:33:23,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,021 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 10:33:23,021 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 10:33:23,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:24,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:24,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:24,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 10:33:24,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:24,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:25,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 10:33:25,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:33:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:33:25,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:33:25,903 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 10:33:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:26,155 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:33:26,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:33:26,155 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 10:33:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:26,156 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:33:26,156 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:33:26,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:33:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:33:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:33:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:33:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:33:26,161 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 10:33:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:26,161 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:33:26,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:33:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:33:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:33:26,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:26,162 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 10:33:26,163 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:26,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 10:33:26,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:26,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:26,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:26,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:27,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:27,207 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 10:33:27,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:27,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:27,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:27,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:28,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 10:33:28,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:33:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:33:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:33:28,561 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 10:33:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:28,757 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:33:28,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:33:28,758 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 10:33:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:28,759 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:33:28,759 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:33:28,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:33:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:33:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:33:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:33:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:33:28,764 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 10:33:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:28,764 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:33:28,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:33:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:33:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:33:28,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:28,764 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 10:33:28,765 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:28,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 10:33:28,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:28,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:28,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:28,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,080 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 10:33:30,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:30,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 10:33:30,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:30,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:31,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 10:33:31,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:33:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:33:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:33:31,653 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 10:33:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:31,875 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:33:31,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:33:31,876 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 10:33:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:31,877 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:33:31,877 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:33:31,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:33:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:33:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:33:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:33:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:33:31,882 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 10:33:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:31,882 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:33:31,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:33:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:33:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:33:31,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:31,883 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 10:33:31,883 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:31,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 10:33:31,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:31,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:31,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:31,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:33,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:33,158 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:33:33,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:33,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:34,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 10:33:34,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:33:34,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:33:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:33:34,824 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 10:33:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:35,065 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:33:35,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:33:35,066 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 10:33:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:35,067 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:33:35,067 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:33:35,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:33:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:33:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:33:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:33:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:33:35,072 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 10:33:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:35,073 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:33:35,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:33:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:33:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:33:35,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:35,074 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 10:33:35,074 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:35,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 10:33:35,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:35,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:35,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:35,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:36,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:36,270 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 10:33:36,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:36,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:38,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:38,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 10:33:38,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:33:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:33:38,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:33:38,627 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 10:33:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:38,881 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:33:38,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:33:38,882 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 10:33:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:38,883 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:33:38,883 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:33:38,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:33:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:33:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:33:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:33:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:33:38,889 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 10:33:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:38,889 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:33:38,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:33:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:33:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:33:38,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:38,890 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 10:33:38,890 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:38,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 10:33:38,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:38,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:38,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:38,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:40,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:40,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:40,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:40,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:40,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:40,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:42,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 10:33:42,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:33:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:33:42,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:33:42,226 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 10:33:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:42,965 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:33:42,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:33:42,965 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 10:33:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:42,966 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:33:42,966 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:33:42,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:33:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:33:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:33:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:33:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 10:33:42,971 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 10:33:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:42,972 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 10:33:42,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:33:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 10:33:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:33:42,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:42,973 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 10:33:42,973 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:42,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 10:33:42,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:42,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:42,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:42,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:44,990 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 10:33:44,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:45,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 10:33:45,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:45,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:46,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 10:33:46,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:33:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:33:46,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:33:46,615 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 10:33:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:46,822 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:33:46,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:33:46,823 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 10:33:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:46,824 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:33:46,824 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:33:46,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:33:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:33:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:33:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:33:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 10:33:46,830 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 10:33:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:46,830 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 10:33:46,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:33:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 10:33:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:33:46,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:46,831 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 10:33:46,831 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:46,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 10:33:46,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:46,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:48,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:48,228 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 10:33:48,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:48,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:48,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:48,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 10:33:50,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:33:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:33:50,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:33:50,434 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 10:33:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:50,645 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:33:50,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:33:50,645 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 10:33:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:50,646 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:33:50,646 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:33:50,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:33:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:33:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:33:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:33:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 10:33:50,651 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 10:33:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:50,652 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 10:33:50,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:33:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 10:33:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:33:50,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:50,653 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 10:33:50,653 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:50,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 10:33:50,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:50,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:50,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:50,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:52,593 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 10:33:52,608 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:52,729 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 10:33:52,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:52,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:54,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 10:33:54,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:33:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:33:54,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:33:54,585 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 10:33:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:54,855 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:33:54,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:33:54,855 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 10:33:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:54,856 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:33:54,856 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:33:54,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:33:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:33:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:33:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:33:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 10:33:54,860 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 10:33:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:54,860 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 10:33:54,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:33:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 10:33:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:33:54,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:54,861 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 10:33:54,861 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:54,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 10:33:54,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:54,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:54,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:54,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:56,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:56,471 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:56,525 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:33:56,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:56,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 10:33:58,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:33:58,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:33:58,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:33:58,355 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 10:33:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:59,092 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:33:59,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:33:59,093 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 10:33:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:59,094 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:33:59,094 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:33:59,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:33:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:33:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 10:33:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:33:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 10:33:59,101 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 10:33:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:59,101 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 10:33:59,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:33:59,101 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 10:33:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:33:59,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:59,102 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 10:33:59,102 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:59,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 10:33:59,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:59,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:59,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:00,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:00,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:00,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:02,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 10:34:02,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:34:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:34:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:34:02,479 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 10:34:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,982 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:34:02,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:34:02,982 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 10:34:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,983 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:34:02,984 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:34:02,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:34:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:34:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 10:34:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:34:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 10:34:02,989 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 10:34:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:02,989 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 10:34:02,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:34:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 10:34:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 10:34:02,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:02,990 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 10:34:02,991 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:02,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:02,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 10:34:02,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:02,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:02,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:02,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,515 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 10:34:04,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:04,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:04,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:04,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 10:34:06,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:34:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:34:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 10:34:06,630 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 10:34:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:06,864 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:34:06,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:34:06,865 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 10:34:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:06,866 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:34:06,866 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 10:34:06,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 10:34:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 10:34:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 10:34:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:34:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 10:34:06,871 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 10:34:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:06,871 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 10:34:06,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:34:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 10:34:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 10:34:06,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:06,871 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 10:34:06,872 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:06,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:06,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 10:34:06,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:06,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:06,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:06,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:08,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:08,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:08,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 10:34:08,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:08,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:11,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 10:34:11,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:34:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:34:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:34:11,146 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 10:34:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:11,399 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:34:11,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:34:11,399 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 10:34:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:11,401 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:34:11,401 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 10:34:11,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:34:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 10:34:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 10:34:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 10:34:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 10:34:11,406 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 10:34:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:11,406 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 10:34:11,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:34:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 10:34:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:34:11,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:11,408 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 10:34:11,408 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:11,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 10:34:11,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:11,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:11,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:11,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:12,942 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 10:34:12,950 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:12,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:12,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:12,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:15,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 10:34:15,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:34:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:34:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 10:34:15,358 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 10:34:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:15,690 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:34:15,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:34:15,691 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 10:34:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:15,692 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:34:15,692 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:34:15,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 10:34:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:34:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 10:34:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 10:34:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 10:34:15,698 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 10:34:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:15,699 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 10:34:15,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:34:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 10:34:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 10:34:15,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:15,700 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 10:34:15,700 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:15,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:15,700 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 10:34:15,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:15,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:15,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:15,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:15,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:17,406 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 10:34:17,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:17,478 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 10:34:17,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:17,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:19,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 10:34:19,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 10:34:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 10:34:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 10:34:19,572 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 10:34:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:19,833 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:34:19,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:34:19,833 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 10:34:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:19,834 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:34:19,835 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 10:34:19,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 10:34:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 10:34:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 10:34:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 10:34:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 10:34:19,840 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 10:34:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:19,840 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 10:34:19,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 10:34:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 10:34:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 10:34:19,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:19,841 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 10:34:19,841 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:19,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 10:34:19,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:19,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:19,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:19,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:22,278 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 10:34:22,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:22,347 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:34:22,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:22,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:24,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:24,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 10:34:24,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 10:34:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 10:34:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 10:34:24,436 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 10:34:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:24,684 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:34:24,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:34:24,684 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 10:34:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:24,685 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:34:24,685 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 10:34:24,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 10:34:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 10:34:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 10:34:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 10:34:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 10:34:24,690 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 10:34:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:24,691 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 10:34:24,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 10:34:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 10:34:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 10:34:24,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:24,691 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 10:34:24,692 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:24,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 10:34:24,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:24,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:24,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:24,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:26,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:26,621 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 10:34:26,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:26,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:28,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:28,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 10:34:28,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:34:28,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:34:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 10:34:28,860 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 10:34:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:29,161 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:34:29,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:34:29,161 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 10:34:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:29,162 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:34:29,162 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 10:34:29,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 10:34:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 10:34:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 10:34:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 10:34:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 10:34:29,166 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 10:34:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:29,167 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 10:34:29,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:34:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 10:34:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 10:34:29,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:29,167 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 10:34:29,167 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:29,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 10:34:29,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:29,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:29,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:29,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:31,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:31,161 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 10:34:31,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:31,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:31,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:31,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:33,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:33,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 10:34:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 10:34:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 10:34:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 10:34:33,492 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 10:34:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:33,740 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:34:33,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:34:33,741 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 10:34:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:33,742 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:34:33,742 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:34:33,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 10:34:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:34:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 10:34:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 10:34:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 10:34:33,748 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 10:34:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:33,748 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 10:34:33,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 10:34:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 10:34:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 10:34:33,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:33,749 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 10:34:33,750 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:33,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 10:34:33,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:33,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:33,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:33,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:35,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:35,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:35,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 10:34:35,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:35,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:37,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 10:34:37,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:34:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:34:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 10:34:37,983 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 10:34:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:38,294 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:34:38,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:34:38,295 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 10:34:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:38,296 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:34:38,296 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 10:34:38,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 10:34:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 10:34:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 10:34:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 10:34:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 10:34:38,302 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 10:34:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:38,303 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 10:34:38,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:34:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 10:34:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 10:34:38,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:38,304 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 10:34:38,304 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:38,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 10:34:38,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:38,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:38,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:38,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:38,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:40,138 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 10:34:40,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:40,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:40,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:40,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:42,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 10:34:42,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:34:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:34:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 10:34:42,740 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 10:34:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:42,999 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:34:43,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:34:43,000 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 10:34:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:43,001 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:34:43,001 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 10:34:43,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 10:34:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 10:34:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 10:34:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 10:34:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 10:34:43,006 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 10:34:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:43,007 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 10:34:43,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 10:34:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 10:34:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 10:34:43,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:43,008 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 10:34:43,008 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:43,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:43,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 10:34:43,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:43,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:43,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:43,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:43,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:45,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:45,202 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 10:34:45,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:45,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 10:34:45,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:45,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:48,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:48,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 10:34:48,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 10:34:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 10:34:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 10:34:48,836 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 10:34:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:49,179 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:34:49,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:34:49,179 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 10:34:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:49,181 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:34:49,181 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 10:34:49,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 10:34:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 10:34:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 10:34:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 10:34:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 10:34:49,188 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 10:34:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:49,189 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 10:34:49,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 10:34:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 10:34:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 10:34:49,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:49,190 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 10:34:49,190 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:49,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 10:34:49,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:49,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:49,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:49,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:51,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:51,537 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:51,607 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:34:51,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:51,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:54,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:54,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 10:34:54,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 10:34:54,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 10:34:54,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 10:34:54,132 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 10:34:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:54,445 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:34:54,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:34:54,446 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 10:34:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:54,447 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:34:54,447 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 10:34:54,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 10:34:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 10:34:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 10:34:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 10:34:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 10:34:54,452 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 10:34:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:54,452 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 10:34:54,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 10:34:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 10:34:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 10:34:54,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:54,453 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 10:34:54,453 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:54,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 10:34:54,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:54,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:54,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:54,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:56,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:56,720 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 10:34:56,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:56,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:59,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:59,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 10:34:59,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 10:34:59,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 10:34:59,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 10:34:59,260 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 10:34:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:59,564 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:34:59,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:34:59,565 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 10:34:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:59,566 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:34:59,566 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 10:34:59,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 10:34:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 10:34:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 10:34:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 10:34:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 10:34:59,572 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 10:34:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:59,572 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 10:34:59,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 10:34:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 10:34:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 10:34:59,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:59,573 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 10:34:59,573 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:59,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 10:34:59,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:59,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:59,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:59,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:01,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:01,850 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 10:35:01,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:01,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:01,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:01,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:04,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 10:35:04,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 10:35:04,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 10:35:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 10:35:04,442 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 10:35:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:04,760 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:35:04,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:35:04,760 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 10:35:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:04,761 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:35:04,761 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 10:35:04,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 10:35:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 10:35:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 10:35:04,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 10:35:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 10:35:04,766 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 10:35:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:04,766 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 10:35:04,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 10:35:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 10:35:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 10:35:04,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:04,768 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 10:35:04,768 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:04,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 10:35:04,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:04,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:04,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:04,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:04,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:07,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:07,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:35:07,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:07,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 10:35:07,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:07,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:09,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:09,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 10:35:09,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 10:35:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 10:35:09,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 10:35:09,820 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 10:35:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:10,181 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 10:35:10,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:35:10,181 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 10:35:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:10,183 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:35:10,183 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 10:35:10,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 10:35:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 10:35:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 10:35:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 10:35:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 10:35:10,188 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 10:35:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:10,188 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 10:35:10,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 10:35:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 10:35:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 10:35:10,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:10,189 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 10:35:10,189 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:10,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 10:35:10,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:10,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:12,583 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 10:35:12,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:12,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:12,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:12,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:15,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:15,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 10:35:15,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 10:35:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 10:35:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 10:35:15,546 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 10:35:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:15,935 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 10:35:15,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:35:15,935 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 10:35:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:15,936 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:35:15,936 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 10:35:15,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 10:35:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 10:35:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 10:35:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 10:35:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 10:35:15,943 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 10:35:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:15,943 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 10:35:15,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 10:35:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 10:35:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 10:35:15,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:15,944 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 10:35:15,944 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:15,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 10:35:15,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:15,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:15,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:15,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:15,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:18,334 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 10:35:18,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:18,532 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 10:35:18,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:18,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:21,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 10:35:21,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 10:35:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 10:35:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 10:35:21,666 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 10:35:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:22,146 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 10:35:22,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:35:22,146 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 10:35:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:22,147 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:35:22,147 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 10:35:22,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 10:35:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 10:35:22,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 10:35:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 10:35:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 10:35:22,153 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 10:35:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:22,153 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 10:35:22,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 10:35:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 10:35:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 10:35:22,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:22,154 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 10:35:22,155 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:22,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 10:35:22,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:22,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:22,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:22,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:22,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:24,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:24,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:35:24,486 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:24,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 10:35:24,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:24,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:27,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:27,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 10:35:27,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 10:35:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 10:35:27,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 10:35:27,794 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 10:35:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:28,391 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 10:35:28,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:35:28,392 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 10:35:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:28,393 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:35:28,393 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 10:35:28,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 10:35:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 10:35:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 10:35:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 10:35:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 10:35:28,398 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 10:35:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:28,399 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 10:35:28,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 10:35:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 10:35:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 10:35:28,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:28,400 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 10:35:28,400 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:28,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 10:35:28,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:28,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:28,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:30,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:30,740 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 10:35:30,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:30,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:33,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:33,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 10:35:33,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 10:35:33,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 10:35:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 10:35:33,996 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 10:35:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:34,379 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 10:35:34,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:35:34,379 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 10:35:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:34,380 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:35:34,381 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 10:35:34,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 10:35:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 10:35:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 10:35:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 10:35:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 10:35:34,386 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 10:35:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:34,387 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 10:35:34,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 10:35:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 10:35:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 10:35:34,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:34,388 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 10:35:34,388 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:34,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 10:35:34,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:34,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:34,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:34,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:34,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:36,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:36,750 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 10:35:36,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:36,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:36,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:36,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:40,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:40,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 10:35:40,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 10:35:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 10:35:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 10:35:40,137 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 10:35:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:40,538 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 10:35:40,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:35:40,539 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 10:35:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:40,540 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:35:40,540 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 10:35:40,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 10:35:40,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 10:35:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 10:35:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 10:35:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 10:35:40,545 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 10:35:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:40,545 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 10:35:40,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 10:35:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 10:35:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 10:35:40,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:40,546 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 10:35:40,546 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:40,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 10:35:40,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:40,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:40,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:40,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:40,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:43,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:43,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:35:43,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:43,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 10:35:43,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:43,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:46,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:46,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 10:35:46,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 10:35:46,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 10:35:46,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 10:35:46,396 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 10:35:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:46,803 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 10:35:46,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:35:46,803 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 10:35:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:46,805 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:35:46,805 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 10:35:46,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 10:35:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 10:35:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 10:35:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 10:35:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 10:35:46,810 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 10:35:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:46,810 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 10:35:46,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 10:35:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 10:35:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 10:35:46,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:46,811 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 10:35:46,811 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:46,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 10:35:46,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:46,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:46,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:46,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:46,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:49,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:49,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:35:49,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:49,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:49,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:49,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:53,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:53,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 10:35:53,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 10:35:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 10:35:53,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 10:35:53,092 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 10:35:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:53,430 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 10:35:53,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:35:53,431 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 10:35:53,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:53,432 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:35:53,432 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 10:35:53,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 10:35:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 10:35:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 10:35:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 10:35:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 10:35:53,437 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 10:35:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:53,437 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 10:35:53,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 10:35:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 10:35:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 10:35:53,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:53,438 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 10:35:53,438 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:53,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 10:35:53,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:53,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:53,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:53,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:53,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:55,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:55,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:35:55,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:56,085 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 10:35:56,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:56,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:59,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:59,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 10:35:59,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 10:35:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 10:35:59,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 10:35:59,620 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 10:36:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:00,004 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 10:36:00,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:36:00,004 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 10:36:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:00,006 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:36:00,006 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 10:36:00,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 10:36:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 10:36:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 10:36:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 10:36:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 10:36:00,012 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 10:36:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:00,013 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 10:36:00,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 10:36:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 10:36:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 10:36:00,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:00,014 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 10:36:00,014 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:00,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 10:36:00,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:00,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:00,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:00,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:00,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:02,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:02,624 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 10:36:02,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:02,802 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 10:36:02,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:02,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:06,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:06,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 10:36:06,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 10:36:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 10:36:06,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 10:36:06,278 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 10:36:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:06,680 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 10:36:06,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:36:06,680 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 10:36:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:06,682 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:36:06,682 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 10:36:06,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 10:36:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 10:36:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 10:36:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 10:36:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 10:36:06,687 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 10:36:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:06,687 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 10:36:06,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 10:36:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 10:36:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 10:36:06,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:06,688 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 10:36:06,689 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:06,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 10:36:06,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:06,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:06,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:06,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:06,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:09,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:09,738 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 10:36:09,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:09,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:13,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:13,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 10:36:13,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 10:36:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 10:36:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 10:36:13,424 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 10:36:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:13,816 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 10:36:13,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:36:13,816 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 10:36:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:13,818 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:36:13,818 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 10:36:13,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 10:36:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 10:36:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 10:36:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 10:36:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 10:36:13,825 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 10:36:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:13,825 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 10:36:13,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 10:36:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 10:36:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 10:36:13,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:13,826 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 10:36:13,826 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:13,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 10:36:13,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:13,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:13,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:13,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:13,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:16,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:16,675 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 10:36:16,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:16,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:16,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:16,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:20,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:20,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 10:36:20,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 10:36:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 10:36:20,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 10:36:20,424 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-30 10:36:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:20,825 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 10:36:20,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:36:20,826 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-30 10:36:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:20,827 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:36:20,827 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 10:36:20,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 10:36:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 10:36:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 10:36:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 10:36:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 10:36:20,832 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-30 10:36:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:20,833 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 10:36:20,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 10:36:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 10:36:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 10:36:20,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:20,833 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-30 10:36:20,834 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:20,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-30 10:36:20,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:20,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:20,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:20,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:20,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:36:21,384 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:36:21,388 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:36:21,388 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:36:21 BoogieIcfgContainer [2018-09-30 10:36:21,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:36:21,389 INFO L168 Benchmark]: Toolchain (without parser) took 239191.49 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.2 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 129.6 MB). Peak memory consumption was 464.3 MB. Max. memory is 7.1 GB. [2018-09-30 10:36:21,390 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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 10:36:21,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.66 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 10:36:21,391 INFO L168 Benchmark]: Boogie Preprocessor took 23.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:36:21,391 INFO L168 Benchmark]: RCFGBuilder took 274.63 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 10:36:21,392 INFO L168 Benchmark]: TraceAbstraction took 238845.37 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 108.5 MB). Peak memory consumption was 443.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:36:21,395 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 0.19 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 41.66 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 23.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 274.63 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 238845.37 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 108.5 MB). Peak memory consumption was 443.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 166 with TraceHistMax 82, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 33 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 238.7s OverallTime, 82 OverallIterations, 82 TraceHistogramMax, 19.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13557 SolverSat, 260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9961 GetRequests, 3320 SyntacticMatches, 0 SemanticMatches, 6641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354240 ImplicationChecksByTransitivity, 205.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=81, 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: 0.3s AutomataMinimizationTime, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 210.5s InterpolantComputationTime, 13443 NumberOfCodeBlocks, 13443 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 13282 ConstructedInterpolants, 0 QuantifiedInterpolants, 8661140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13600 ConjunctsInSsa, 3480 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/354240 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-36-21-404.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-36-21-404.csv Completed graceful shutdown