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/LuxembourgOctopus.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:33:08,282 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:33:08,284 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:33:08,295 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:33:08,296 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:33:08,297 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:33:08,298 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:33:08,302 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:33:08,305 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:33:08,306 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:33:08,307 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:33:08,332 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 [2018-10-04 12:33:08,363 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:33:08,364 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:33:08,365 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:33:08,365 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:33:08,366 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:33:08,366 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:33:08,366 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:33:08,367 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:33:08,367 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:33:08,367 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:33:08,367 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:33:08,367 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:33:08,368 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:33:08,369 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:33:08,369 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:33:08,370 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:33:08,370 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:33:08,370 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:33:08,370 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:33:08,370 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:33:08,371 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:33:08,372 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:33:08,372 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:33:08,373 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:33:08,373 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:33:08,373 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:33:08,373 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:33:08,373 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:33:08,373 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:33:08,374 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:33:08,425 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:33:08,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:33:08,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:33:08,449 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:33:08,449 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:33:08,450 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-10-04 12:33:08,450 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-10-04 12:33:08,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:33:08,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:33:08,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:33:08,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:33:08,493 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:33:08,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,532 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:33:08,532 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:33:08,533 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:33:08,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:33:08,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:33:08,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:33:08,536 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:33:08,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/1) ... [2018-10-04 12:33:08,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:33:08,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:33:08,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:33:08,559 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:33:08,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (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 [2018-10-04 12:33:08,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 12:33:08,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 12:33:08,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 12:33:08,870 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:33:08,871 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:33:08 BoogieIcfgContainer [2018-10-04 12:33:08,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:33:08,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:33:08,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:33:08,876 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:33:08,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:08" (1/2) ... [2018-10-04 12:33:08,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3763e9 and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:33:08, skipping insertion in model container [2018-10-04 12:33:08,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:33:08" (2/2) ... [2018-10-04 12:33:08,880 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-10-04 12:33:08,891 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:33:08,903 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:33:08,953 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:33:08,954 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:33:08,954 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:33:08,954 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:33:08,954 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:33:08,955 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:33:08,955 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:33:08,955 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:33:08,955 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:33:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:33:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:33:08,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:08,980 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:33:08,981 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:08,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-04 12:33:08,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:08,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:09,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:09,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:33:09,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:33:09,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:33:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:33:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:33:09,175 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 12:33:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:09,216 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 12:33:09,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:33:09,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 12:33:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:09,230 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:33:09,230 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 12:33:09,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:33:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 12:33:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 12:33:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 12:33:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 12:33:09,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 12:33:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:09,273 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 12:33:09,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:33:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 12:33:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:33:09,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:09,274 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:33:09,274 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:09,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-04 12:33:09,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:09,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:09,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:09,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:09,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:09,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:09,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-10-04 12:33:09,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:33:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:33:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:33:09,548 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-04 12:33:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:09,616 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 12:33:09,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:33:09,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 12:33:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:09,618 INFO L225 Difference]: With dead ends: 8 [2018-10-04 12:33:09,618 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:33:09,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:33:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:33:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:33:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:33:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:33:09,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:33:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:09,623 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:33:09,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:33:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:33:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:33:09,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:09,624 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 12:33:09,624 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:09,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-04 12:33:09,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:09,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:09,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:09,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:09,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:09,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:09,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:09,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-04 12:33:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:33:09,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:33:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:33:09,816 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 12:33:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:09,858 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:33:09,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:33:09,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 12:33:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:09,859 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:33:09,859 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:33:09,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:33:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:33:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:33:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:33:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:33:09,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:33:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:09,863 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:33:09,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:33:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:33:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:33:09,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:09,864 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 12:33:09,864 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:09,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:09,864 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-04 12:33:09,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:09,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:09,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:09,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:09,949 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 [2018-10-04 12:33:09,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:09,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:33:09,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:09,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:10,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:10,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-04 12:33:10,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:33:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:33:10,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:33:10,019 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-04 12:33:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:10,105 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:33:10,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:33:10,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-04 12:33:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:10,107 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:33:10,107 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:33:10,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:33:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:33:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:33:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:33:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:33:10,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:33:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:10,114 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:33:10,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:33:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:33:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:33:10,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:10,115 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 12:33:10,116 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:10,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-04 12:33:10,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:10,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:10,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:10,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:10,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:10,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:10,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:10,510 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:10,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:10,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:10,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:10,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-04 12:33:10,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:33:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:33:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:33:10,552 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 12:33:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:10,618 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:33:10,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:33:10,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 12:33:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:10,619 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:33:10,620 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:33:10,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:33:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:33:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:33:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:33:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:33:10,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:33:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:10,626 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:33:10,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:33:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:33:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:33:10,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:10,627 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 12:33:10,627 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:10,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-04 12:33:10,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:10,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:10,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:10,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:10,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:10,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:10,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:10,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:33:10,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:10,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:10,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:10,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-04 12:33:10,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:33:10,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:33:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:33:10,967 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-04 12:33:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:11,000 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:33:11,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:33:11,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-04 12:33:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:11,003 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:33:11,003 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:33:11,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:33:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:33:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:33:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:33:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:33:11,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:33:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:11,007 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:33:11,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:33:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:33:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:33:11,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:11,008 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 12:33:11,009 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:11,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-04 12:33:11,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:11,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:11,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:11,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:11,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:11,145 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 [2018-10-04 12:33:11,156 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:11,178 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:33:11,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:11,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:11,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:11,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-04 12:33:11,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:33:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:33:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:33:11,225 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 12:33:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:11,267 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:33:11,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:33:11,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 12:33:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:11,269 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:33:11,270 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:33:11,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:33:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:33:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:33:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:33:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:33:11,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:33:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:11,274 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:33:11,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:33:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:33:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:33:11,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:11,275 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 12:33:11,275 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:11,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-04 12:33:11,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:11,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:11,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:11,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:11,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:11,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:11,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:11,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:11,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:11,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:11,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-04 12:33:11,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:33:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:33:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:33:11,816 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-04 12:33:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:11,853 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:33:11,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:33:11,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-04 12:33:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:11,859 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:33:11,859 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:33:11,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:33:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:33:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:33:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:33:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:33:11,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:33:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:11,863 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:33:11,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:33:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:33:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:33:11,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:11,863 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 12:33:11,864 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:11,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-04 12:33:11,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:11,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:11,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:11,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:11,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:12,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:12,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:12,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:12,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:12,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:12,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-04 12:33:12,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:33:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:33:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:33:12,165 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 12:33:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:12,225 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:33:12,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:33:12,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 12:33:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:12,227 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:33:12,227 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:33:12,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:33:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:33:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:33:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:33:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:33:12,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:33:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:12,232 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:33:12,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:33:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:33:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:33:12,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:12,233 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 12:33:12,233 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:12,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-04 12:33:12,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:12,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:12,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:12,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:12,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:12,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:12,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:33:12,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:12,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:12,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-04 12:33:12,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:33:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:33:12,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:33:12,498 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-04 12:33:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:12,553 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:33:12,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:33:12,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-04 12:33:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:12,554 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:33:12,555 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:33:12,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:33:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:33:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:33:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:33:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:33:12,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:33:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:12,560 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:33:12,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:33:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:33:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:33:12,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:12,561 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 12:33:12,561 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:12,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-04 12:33:12,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:12,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:12,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:12,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:12,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:12,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:12,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:12,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:12,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:12,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-04 12:33:12,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:33:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:33:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:33:12,872 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 12:33:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:12,909 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:33:12,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:33:12,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 12:33:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:12,911 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:33:12,911 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:33:12,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:33:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:33:12,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:33:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:33:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:33:12,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:33:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:12,917 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:33:12,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:33:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:33:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:33:12,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:12,918 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 12:33:12,918 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:12,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-04 12:33:12,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:12,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:12,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:12,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:13,097 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 [2018-10-04 12:33:13,112 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:13,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:33:13,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:13,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:13,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-04 12:33:13,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:33:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:33:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:33:13,181 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-04 12:33:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:13,244 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:33:13,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:33:13,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-04 12:33:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:13,246 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:33:13,247 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:33:13,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:33:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:33:13,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:33:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:33:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:33:13,250 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:33:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:13,251 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:33:13,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:33:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:33:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:33:13,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:13,252 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 12:33:13,252 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:13,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-04 12:33:13,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:13,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:13,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:13,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:13,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:13,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:13,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:13,609 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:33:13,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:13,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:13,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-04 12:33:13,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:33:13,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:33:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:33:13,650 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 12:33:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:13,732 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:33:13,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:33:13,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 12:33:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:13,734 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:33:13,734 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:33:13,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:33:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:33:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:33:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:33:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:33:13,738 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:33:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:13,738 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:33:13,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:33:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:33:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:33:13,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:13,739 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 12:33:13,740 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:13,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-04 12:33:13,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:13,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:13,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:13,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:13,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:13,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:13,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:13,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:14,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:14,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-04 12:33:14,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:33:14,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:33:14,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:33:14,011 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-04 12:33:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:14,311 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:33:14,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:33:14,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-04 12:33:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:14,312 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:33:14,312 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:33:14,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:33:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:33:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:33:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:33:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:33:14,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:33:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:14,317 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:33:14,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:33:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:33:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:33:14,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:14,318 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 12:33:14,318 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:14,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-04 12:33:14,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:14,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:14,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:14,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:14,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:14,642 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 [2018-10-04 12:33:14,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:14,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:14,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:14,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:14,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:14,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-04 12:33:14,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:33:14,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:33:14,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:33:14,704 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 12:33:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:15,054 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:33:15,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:33:15,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 12:33:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:15,056 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:33:15,057 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:33:15,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:33:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:33:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:33:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:33:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:33:15,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:33:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:15,063 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:33:15,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:33:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:33:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:33:15,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:15,064 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 12:33:15,064 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:15,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-04 12:33:15,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:15,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:15,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:15,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:15,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:15,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:15,369 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 [2018-10-04 12:33:15,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:15,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:33:15,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:15,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:15,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:15,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-04 12:33:15,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:33:15,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:33:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:33:15,650 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-04 12:33:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:15,985 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:33:15,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:33:15,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-04 12:33:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:15,987 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:33:15,987 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:33:15,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:33:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:33:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:33:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:33:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:33:15,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:33:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:15,991 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:33:15,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:33:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:33:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:33:15,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:15,992 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 12:33:15,992 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:15,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-04 12:33:15,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:15,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:15,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:15,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:15,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:16,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:16,391 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 [2018-10-04 12:33:16,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:16,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:16,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:16,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:16,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:16,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-04 12:33:16,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:33:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:33:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:33:16,467 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 12:33:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:16,526 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:33:16,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:33:16,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 12:33:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:16,527 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:33:16,527 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:33:16,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:33:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:33:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:33:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:33:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:33:16,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:33:16,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:16,533 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:33:16,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:33:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:33:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:33:16,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:16,534 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 12:33:16,534 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:16,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-04 12:33:16,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:16,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:16,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:16,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:16,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:17,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:17,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:17,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:17,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:33:17,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:17,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:17,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:17,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-04 12:33:17,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:33:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:33:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:33:17,527 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-04 12:33:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:17,580 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:33:17,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:33:17,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-04 12:33:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:17,583 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:33:17,583 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:33:17,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:33:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:33:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:33:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:33:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:33:17,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:33:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:17,587 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:33:17,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:33:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:33:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:33:17,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:17,588 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 12:33:17,589 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:17,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-04 12:33:17,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:17,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:17,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:17,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:17,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:18,139 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 [2018-10-04 12:33:18,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:18,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:33:18,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:18,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:18,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-04 12:33:18,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:33:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:33:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:33:18,205 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 12:33:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:18,254 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:33:18,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:33:18,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 12:33:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:18,256 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:33:18,256 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:33:18,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:33:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:33:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:33:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:33:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:33:18,260 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:33:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:18,261 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:33:18,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:33:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:33:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:33:18,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:18,262 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 12:33:18,262 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:18,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-04 12:33:18,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:18,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:18,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:18,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:18,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:18,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:18,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:18,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-04 12:33:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:33:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:33:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:33:18,637 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-04 12:33:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:18,683 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:33:18,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:33:18,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-04 12:33:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:18,684 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:33:18,684 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:33:18,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:33:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:33:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:33:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:33:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:33:18,688 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:33:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:18,689 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:33:18,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:33:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:33:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:33:18,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:18,689 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 12:33:18,690 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:18,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-04 12:33:18,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:18,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:18,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:18,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:19,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:19,043 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 [2018-10-04 12:33:19,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:19,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:19,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:19,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:19,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:19,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-04 12:33:19,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:33:19,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:33:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:33:19,135 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 12:33:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:19,348 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:33:19,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:33:19,348 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 12:33:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:19,349 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:33:19,350 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:33:19,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:33:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:33:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:33:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:33:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:33:19,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:33:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:19,355 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:33:19,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:33:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:33:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:33:19,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:19,356 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 12:33:19,356 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:19,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-04 12:33:19,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:19,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:19,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:19,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:19,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:19,708 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 [2018-10-04 12:33:19,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:19,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:33:19,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:19,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:19,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:19,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-04 12:33:19,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:33:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:33:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:33:19,781 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-04 12:33:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:19,864 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:33:19,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:33:19,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-04 12:33:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:19,867 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:33:19,868 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:33:19,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:33:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:33:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:33:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:33:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:33:19,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:33:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:19,872 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:33:19,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:33:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:33:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:33:19,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:19,872 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 12:33:19,873 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:19,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-04 12:33:19,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:19,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:19,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:19,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:20,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:20,261 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:20,281 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:20,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:20,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:20,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-04 12:33:20,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:33:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:33:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:33:20,346 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 12:33:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:20,427 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:33:20,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:33:20,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 12:33:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:20,428 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:33:20,428 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:33:20,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:33:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:33:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:33:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:33:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:33:20,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:33:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:20,434 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:33:20,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:33:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:33:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:33:20,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:20,436 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 12:33:20,436 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:20,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:20,436 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-04 12:33:20,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:20,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:20,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:20,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:21,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:21,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:21,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:33:21,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:21,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:21,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-04 12:33:21,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:33:21,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:33:21,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:33:21,494 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-04 12:33:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:21,570 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:33:21,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:33:21,571 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-04 12:33:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:21,571 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:33:21,572 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:33:21,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:33:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:33:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:33:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:33:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:33:21,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:33:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:21,577 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:33:21,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:33:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:33:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:33:21,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:21,579 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 12:33:21,579 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:21,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:21,580 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-04 12:33:21,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:21,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:21,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:21,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:22,420 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 [2018-10-04 12:33:22,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:22,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:33:22,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:22,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:22,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-04 12:33:22,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:33:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:33:22,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:33:22,498 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 12:33:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:22,556 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:33:22,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:33:22,557 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 12:33:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:22,557 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:33:22,558 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:33:22,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:33:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:33:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:33:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:33:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:33:22,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:33:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:22,563 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:33:22,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:33:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:33:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:33:22,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:22,564 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 12:33:22,565 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:22,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-04 12:33:22,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:22,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:22,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:22,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:23,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:23,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:23,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:24,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:24,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:24,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-04 12:33:24,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:33:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:33:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:33:24,052 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-04 12:33:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:24,234 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:33:24,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:33:24,234 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-04 12:33:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:24,234 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:33:24,235 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:33:24,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:33:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:33:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:33:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:33:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:33:24,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:33:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:24,238 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:33:24,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:33:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:33:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:33:24,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:24,239 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 12:33:24,239 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:24,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-04 12:33:24,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:24,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:24,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:24,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:24,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:25,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:25,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:25,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:25,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:25,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:25,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-04 12:33:25,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:33:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:33:25,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:33:25,198 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 12:33:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:25,255 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:33:25,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:33:25,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 12:33:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:25,256 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:33:25,256 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:33:25,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:33:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:33:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:33:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:33:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:33:25,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:33:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:25,261 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:33:25,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:33:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:33:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:33:25,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:25,262 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 12:33:25,262 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:25,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-04 12:33:25,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:25,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:25,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:25,693 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 [2018-10-04 12:33:25,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:25,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:33:25,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:25,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:25,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-04 12:33:25,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:33:25,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:33:25,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:33:25,762 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-04 12:33:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:25,846 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:33:25,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:33:25,846 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-04 12:33:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:25,847 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:33:25,847 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:33:25,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:33:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:33:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:33:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:33:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:33:25,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:33:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:25,853 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:33:25,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:33:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:33:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:33:25,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:25,853 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 12:33:25,854 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:25,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:25,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-04 12:33:25,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:25,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:25,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:25,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:26,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:26,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:26,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:26,485 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:26,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:26,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:26,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:26,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-04 12:33:26,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:33:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:33:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:33:26,531 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 12:33:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:26,751 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:33:26,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:33:26,751 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 12:33:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:26,751 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:33:26,751 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:33:26,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:33:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:33:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:33:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:33:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:33:26,756 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:33:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:26,756 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:33:26,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:33:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:33:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:33:26,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:26,757 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 12:33:26,757 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:26,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-04 12:33:26,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:26,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:26,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:26,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:26,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:27,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:27,662 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 [2018-10-04 12:33:27,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:27,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:33:27,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:27,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:27,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:27,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-04 12:33:27,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:33:27,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:33:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:33:27,749 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-04 12:33:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:27,840 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:33:27,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:33:27,841 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-04 12:33:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:27,841 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:33:27,842 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:33:27,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:33:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:33:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:33:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:33:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:33:27,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:33:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:27,847 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:33:27,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:33:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:33:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:33:27,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:27,848 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-04 12:33:27,848 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:27,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-04 12:33:27,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:27,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:27,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:27,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:27,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:28,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:28,521 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 [2018-10-04 12:33:28,532 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:28,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:33:28,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:28,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:28,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:28,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-04 12:33:28,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:33:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:33:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:33:28,606 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 12:33:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:28,760 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:33:28,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:33:28,760 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 12:33:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:28,761 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:33:28,761 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:33:28,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:33:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:33:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:33:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:33:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:33:28,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:33:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:28,765 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:33:28,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:33:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:33:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:33:28,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:28,766 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 12:33:28,766 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:28,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-04 12:33:28,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:28,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:28,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:28,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:29,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:29,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:29,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:29,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:29,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:29,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-04 12:33:29,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:33:29,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:33:29,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:33:29,362 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-04 12:33:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:29,419 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:33:29,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:33:29,419 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-04 12:33:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:29,420 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:33:29,420 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:33:29,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:33:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:33:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:33:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:33:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:33:29,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:33:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:29,427 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:33:29,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:33:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:33:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:33:29,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:29,428 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-04 12:33:29,428 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:29,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-04 12:33:29,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:29,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:29,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:29,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:30,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:30,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:30,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:30,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:30,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:30,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-04 12:33:30,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:33:30,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:33:30,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:33:30,291 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 12:33:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:30,387 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:33:30,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:33:30,388 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 12:33:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:30,388 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:33:30,388 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:33:30,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:33:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:33:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:33:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:33:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:33:30,392 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:33:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:30,392 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:33:30,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:33:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:33:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:33:30,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:30,393 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 12:33:30,393 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:30,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-04 12:33:30,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:30,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:30,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:30,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:30,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:31,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:31,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:31,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:33:31,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:31,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:31,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-04 12:33:31,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:33:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:33:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:33:31,109 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-04 12:33:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:31,171 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:33:31,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:33:31,171 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-04 12:33:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:31,172 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:33:31,172 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:33:31,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:33:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:33:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:33:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:33:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:33:31,176 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:33:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:31,176 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:33:31,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:33:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:33:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:33:31,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:31,177 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-04 12:33:31,177 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:31,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-04 12:33:31,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:31,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:31,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:31,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:31,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:31,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:31,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:31,877 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:31,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:31,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:31,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-04 12:33:31,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:33:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:33:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:33:31,931 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 12:33:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:32,575 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:33:32,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:33:32,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 12:33:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:32,576 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:33:32,576 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:33:32,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:33:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:33:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:33:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:33:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:33:32,580 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:33:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:32,580 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:33:32,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:33:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:33:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:33:32,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:32,581 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 12:33:32,581 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:32,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-04 12:33:32,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:32,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:32,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:32,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:32,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:33,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:33,633 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 [2018-10-04 12:33:33,640 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:33,666 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:33:33,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:33,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:33,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:33,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-04 12:33:33,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:33:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:33:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:33:33,709 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-04 12:33:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:33,786 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:33:33,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:33:33,786 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-04 12:33:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:33,787 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:33:33,787 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:33:33,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:33:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:33:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:33:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:33:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:33:33,790 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:33:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:33,791 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:33:33,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:33:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:33:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:33:33,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:33,791 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-04 12:33:33,791 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:33,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-04 12:33:33,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:33,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:33,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:33,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:33,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:34,437 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 [2018-10-04 12:33:34,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:34,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:33:34,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:34,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:34,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-04 12:33:34,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:33:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:33:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:33:34,514 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 12:33:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:34,562 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:33:34,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:33:34,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 12:33:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:34,563 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:33:34,563 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:33:34,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:33:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:33:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:33:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:33:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:33:34,567 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:33:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:34,567 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:33:34,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:33:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:33:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:33:34,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:34,568 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 12:33:34,568 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:34,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-04 12:33:34,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:34,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:34,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:34,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:35,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:35,312 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 [2018-10-04 12:33:35,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:35,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:35,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:35,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-04 12:33:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:33:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:33:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:33:35,414 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-04 12:33:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:35,482 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:33:35,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:33:35,482 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-04 12:33:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:35,483 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:33:35,483 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:33:35,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:33:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:33:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:33:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:33:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:33:35,486 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:33:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:35,486 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:33:35,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:33:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:33:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:33:35,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:35,487 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-04 12:33:35,487 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:35,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-04 12:33:35,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:35,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:35,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:35,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:35,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:36,215 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 [2018-10-04 12:33:36,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:36,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:36,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:36,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:36,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-04 12:33:36,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:33:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:33:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:33:36,306 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 12:33:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:36,458 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:33:36,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:33:36,458 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 12:33:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:36,459 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:33:36,459 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:33:36,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:33:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:33:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:33:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:33:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:33:36,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:33:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:36,464 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:33:36,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:33:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:33:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:33:36,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:36,464 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 12:33:36,465 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:36,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-04 12:33:36,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:36,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:36,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:36,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:36,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:37,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:37,523 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 [2018-10-04 12:33:37,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:37,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:33:37,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:37,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:37,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:37,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-04 12:33:37,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:33:37,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:33:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:33:37,645 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-04 12:33:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:37,735 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:33:37,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:33:37,736 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-04 12:33:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:37,737 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:33:37,737 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:33:37,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:33:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:33:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:33:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:33:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:33:37,741 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:33:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:37,741 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:33:37,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:33:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:33:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:33:37,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:37,742 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-04 12:33:37,742 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:37,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-10-04 12:33:37,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:37,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:37,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:37,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:37,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:38,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:38,556 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 [2018-10-04 12:33:38,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:38,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:38,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:38,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:38,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:38,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-04 12:33:38,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:33:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:33:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:33:38,634 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 12:33:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:38,708 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:33:38,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:33:38,709 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 12:33:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:38,710 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:33:38,710 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:33:38,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:33:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:33:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:33:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:33:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:33:38,714 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:33:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:38,714 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:33:38,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:33:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:33:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:33:38,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:38,715 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 12:33:38,715 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:38,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-10-04 12:33:38,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:38,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:38,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:39,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:39,747 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 [2018-10-04 12:33:39,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:39,791 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:33:39,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:39,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:39,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:39,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-04 12:33:39,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:33:39,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:33:39,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:33:39,832 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-04 12:33:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:39,906 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:33:39,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:33:39,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-04 12:33:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:39,908 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:33:39,908 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:33:39,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:33:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:33:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:33:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:33:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:33:39,911 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:33:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:39,911 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:33:39,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:33:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:33:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:33:39,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:39,911 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-04 12:33:39,911 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:39,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-10-04 12:33:39,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:39,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:39,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:39,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:39,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:40,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:40,791 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 [2018-10-04 12:33:40,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:40,831 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:33:40,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:40,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:40,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:40,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-04 12:33:40,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:33:40,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:33:40,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:33:40,871 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 12:33:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:40,945 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:33:40,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:33:40,946 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 12:33:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:40,947 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:33:40,947 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:33:40,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:33:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:33:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:33:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:33:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:33:40,950 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:33:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:40,950 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:33:40,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:33:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:33:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:33:40,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:40,951 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 12:33:40,951 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:40,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-10-04 12:33:40,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:40,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:40,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:40,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:40,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:41,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:41,934 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 [2018-10-04 12:33:41,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:41,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:42,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:42,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-04 12:33:42,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:33:42,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:33:42,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:33:42,014 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-04 12:33:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:42,156 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 12:33:42,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:33:42,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-04 12:33:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:42,158 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:33:42,158 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:33:42,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:33:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:33:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:33:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:33:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:33:42,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 12:33:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:42,163 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:33:42,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:33:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:33:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:33:42,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:42,164 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-04 12:33:42,164 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:42,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-10-04 12:33:42,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:42,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:42,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:42,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:42,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:43,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:43,408 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 [2018-10-04 12:33:43,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:43,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:43,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:43,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:43,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:43,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-04 12:33:43,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:33:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:33:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:33:43,487 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 12:33:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:43,569 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:33:43,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:33:43,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 12:33:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:43,570 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:33:43,570 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:33:43,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:33:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:33:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:33:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:33:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:33:43,574 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 12:33:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:43,574 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:33:43,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:33:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:33:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:33:43,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:43,575 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 12:33:43,575 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:43,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-10-04 12:33:43,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:43,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:43,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:44,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:44,633 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 [2018-10-04 12:33:44,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:44,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:33:44,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:44,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:44,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:44,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-04 12:33:44,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:33:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:33:44,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:33:44,745 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-04 12:33:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:45,140 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 12:33:45,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:33:45,140 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-04 12:33:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:45,141 INFO L225 Difference]: With dead ends: 52 [2018-10-04 12:33:45,141 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:33:45,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:33:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:33:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:33:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:33:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:33:45,144 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 12:33:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:45,144 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:33:45,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:33:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:33:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:33:45,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:45,145 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-04 12:33:45,145 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:45,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-10-04 12:33:45,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:45,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:45,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:45,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:45,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:46,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:46,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:46,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:46,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:46,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:46,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:46,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:46,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-10-04 12:33:46,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:33:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:33:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:33:46,474 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 12:33:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:46,780 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:33:46,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:33:46,780 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 12:33:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:46,781 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:33:46,781 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:33:46,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:33:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:33:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:33:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:33:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:33:46,784 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 12:33:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:46,784 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:33:46,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:33:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:33:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:33:46,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:46,785 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 12:33:46,785 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:46,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-10-04 12:33:46,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:46,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:46,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:46,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:46,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:48,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:48,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:48,272 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:48,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:33:48,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:48,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:48,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:48,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-04 12:33:48,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:33:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:33:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:33:48,355 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-04 12:33:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:48,443 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 12:33:48,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:33:48,450 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-04 12:33:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:48,451 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:33:48,451 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:33:48,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:33:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:33:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:33:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:33:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:33:48,455 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 12:33:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:48,455 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:33:48,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:33:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:33:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:33:48,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:48,456 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-04 12:33:48,456 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:48,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-10-04 12:33:48,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:48,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:48,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:48,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:48,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:49,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:49,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:49,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:49,583 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:33:49,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:49,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:49,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:49,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-10-04 12:33:49,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:33:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:33:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:33:49,623 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 12:33:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:49,708 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:33:49,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:33:49,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 12:33:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:49,709 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:33:49,709 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:33:49,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:33:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:33:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:33:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:33:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:33:49,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 12:33:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:49,714 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:33:49,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:33:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:33:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:33:49,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:49,715 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 12:33:49,715 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:49,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-10-04 12:33:49,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:49,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:49,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:49,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:49,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:51,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:51,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:51,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:51,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:51,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:51,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-10-04 12:33:51,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:33:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:33:51,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:33:51,398 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-04 12:33:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:51,490 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 12:33:51,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:33:51,490 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-04 12:33:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:51,491 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:33:51,491 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:33:51,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:33:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:33:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:33:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:33:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:33:51,494 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 12:33:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:51,495 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:33:51,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:33:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:33:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:33:51,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:51,495 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-04 12:33:51,496 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:51,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-10-04 12:33:51,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:51,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:51,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:51,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:51,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:52,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:52,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:52,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:52,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:52,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:52,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:52,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:52,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-10-04 12:33:52,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:33:52,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:33:52,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:33:52,819 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 12:33:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:52,986 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:33:52,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:33:52,987 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 12:33:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:52,988 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:33:52,988 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:33:52,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:33:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:33:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:33:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:33:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:33:52,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 12:33:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:52,991 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:33:52,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:33:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:33:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:33:52,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:52,992 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 12:33:52,992 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:52,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-10-04 12:33:52,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:52,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:52,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:52,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:52,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:54,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:54,301 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 [2018-10-04 12:33:54,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:54,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:33:54,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:54,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:54,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:54,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-10-04 12:33:54,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:33:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:33:54,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:33:54,420 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-04 12:33:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:54,525 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 12:33:54,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:33:54,525 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-04 12:33:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:54,526 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:33:54,526 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:33:54,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:33:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:33:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:33:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:33:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:33:54,530 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 12:33:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:54,531 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:33:54,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:33:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:33:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:33:54,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:54,531 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-04 12:33:54,532 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:54,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-10-04 12:33:54,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:54,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:54,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:54,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:54,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:55,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:55,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:55,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:55,918 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:55,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:55,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:55,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:55,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-10-04 12:33:55,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:33:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:33:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:55,958 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 12:33:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:56,055 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:33:56,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:33:56,056 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 12:33:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:56,056 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:33:56,057 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:33:56,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:33:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:33:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:33:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:33:56,060 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 12:33:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:56,061 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:33:56,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:33:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:33:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:33:56,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:56,061 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 12:33:56,062 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:56,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-10-04 12:33:56,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:56,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:56,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:56,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:56,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:57,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:57,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:57,340 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:57,385 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:33:57,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:57,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:57,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:57,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-10-04 12:33:57,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:33:57,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:33:57,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:33:57,438 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-04 12:33:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:57,589 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 12:33:57,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:33:57,589 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-04 12:33:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:57,590 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:33:57,590 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:33:57,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:33:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:33:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:33:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:33:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:33:57,594 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 12:33:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:57,594 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:33:57,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:33:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:33:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:33:57,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:57,594 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-04 12:33:57,594 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:57,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-10-04 12:33:57,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:57,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:57,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:57,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:57,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:59,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:59,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:59,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:59,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:33:59,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:59,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:59,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:59,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-10-04 12:33:59,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:33:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:33:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:59,329 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 12:33:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:59,436 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:33:59,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:33:59,437 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 12:33:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:59,438 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:33:59,438 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:33:59,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:33:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:33:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:33:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:33:59,441 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 12:33:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:59,441 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:33:59,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:33:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:33:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:33:59,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:59,442 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 12:33:59,442 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:59,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-10-04 12:33:59,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:59,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:59,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:00,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:00,829 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 [2018-10-04 12:34:00,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:00,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:00,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:00,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-10-04 12:34:00,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:34:00,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:34:00,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:34:00,958 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-04 12:34:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:01,141 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 12:34:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:34:01,142 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-04 12:34:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:01,142 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:34:01,143 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:34:01,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:34:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:34:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:34:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:34:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:34:01,146 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 12:34:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:01,146 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:34:01,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:34:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:34:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:34:01,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:01,147 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-04 12:34:01,147 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:01,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-10-04 12:34:01,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:01,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:01,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:01,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:01,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:02,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:02,590 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 [2018-10-04 12:34:02,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:02,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:02,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:02,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:02,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:02,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-10-04 12:34:02,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:34:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:34:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:34:02,678 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 12:34:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:02,779 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:34:02,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:34:02,780 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 12:34:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:02,781 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:34:02,781 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:34:02,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:34:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:34:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:34:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:34:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:34:02,785 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 12:34:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:02,785 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:34:02,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:34:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:34:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:34:02,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:02,786 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 12:34:02,786 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:02,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-10-04 12:34:02,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:02,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:02,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:04,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:04,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:04,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:04,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:34:04,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:04,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:04,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:04,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-10-04 12:34:04,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:34:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:34:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:34:04,753 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-04 12:34:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:04,896 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 12:34:04,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:34:04,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-04 12:34:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:04,897 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:34:04,897 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:34:04,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:34:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:34:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:34:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:34:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:34:04,901 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 12:34:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:04,901 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:34:04,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:34:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:34:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:34:04,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:04,902 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-04 12:34:04,902 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:04,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-10-04 12:34:04,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:04,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:04,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:04,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:04,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:06,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:06,768 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 [2018-10-04 12:34:06,778 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:06,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:06,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:06,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:06,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:06,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-10-04 12:34:06,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:34:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:34:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:34:06,880 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 12:34:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:06,991 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:34:06,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:34:06,992 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 12:34:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:06,993 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:34:06,993 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:34:06,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:34:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:34:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:34:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:34:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:34:06,996 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 12:34:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:06,996 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:34:06,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:34:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:34:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:34:06,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:06,997 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 12:34:06,997 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:06,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-10-04 12:34:06,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:06,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:06,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:06,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:06,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:09,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:09,205 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 [2018-10-04 12:34:09,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:09,263 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:34:09,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:09,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:09,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:09,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-10-04 12:34:09,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:34:09,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:34:09,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:34:09,315 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-04 12:34:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:09,429 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 12:34:09,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:34:09,430 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-04 12:34:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:09,431 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:34:09,431 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:34:09,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:34:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:34:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:34:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:34:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:34:09,435 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 12:34:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:09,435 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:34:09,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:34:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:34:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:34:09,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:09,435 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-04 12:34:09,436 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:09,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-10-04 12:34:09,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:09,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:09,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:09,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:09,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:11,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:11,037 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 [2018-10-04 12:34:11,046 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:11,094 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:34:11,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:11,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:11,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:11,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-10-04 12:34:11,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:34:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:34:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:34:11,151 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 12:34:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:11,277 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:34:11,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:34:11,277 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 12:34:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:11,278 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:34:11,278 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:34:11,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:34:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:34:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:34:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:34:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:34:11,282 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 12:34:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:11,282 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:34:11,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:34:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:34:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:34:11,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:11,282 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 12:34:11,283 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:11,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-10-04 12:34:11,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:11,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:11,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:11,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:13,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:13,358 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 [2018-10-04 12:34:13,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:13,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:13,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:13,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-10-04 12:34:13,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:34:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:34:13,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:34:13,449 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-04 12:34:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:13,589 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 12:34:13,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:34:13,590 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-04 12:34:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:13,590 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:34:13,591 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:34:13,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:34:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:34:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:34:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:34:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:34:13,594 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 12:34:13,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:13,594 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:34:13,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:34:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:34:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:34:13,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:13,595 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-04 12:34:13,595 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:13,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-10-04 12:34:13,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:13,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:13,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:13,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:13,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:16,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:16,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:16,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:16,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:16,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:16,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:16,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:16,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-10-04 12:34:16,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:34:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:34:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:34:16,422 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 12:34:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:16,638 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:34:16,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:34:16,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 12:34:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:16,639 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:34:16,639 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:34:16,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:34:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:34:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:34:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:34:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:34:16,643 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 12:34:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:16,643 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:34:16,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:34:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:34:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:34:16,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:16,644 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 12:34:16,644 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:16,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-10-04 12:34:16,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:16,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:16,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:16,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:18,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:18,864 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 [2018-10-04 12:34:18,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:18,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:34:18,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:19,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:19,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:19,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-10-04 12:34:19,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:34:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:34:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:34:19,042 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-04 12:34:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:19,169 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 12:34:19,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:34:19,171 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-04 12:34:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:19,172 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:34:19,172 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:34:19,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:34:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:34:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:34:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:34:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:34:19,176 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 12:34:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:19,177 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:34:19,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:34:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:34:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:34:19,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:19,177 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-04 12:34:19,178 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:19,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-10-04 12:34:19,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:19,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:19,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:19,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:19,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:21,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:21,285 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 [2018-10-04 12:34:21,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:21,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:21,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:21,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:21,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:21,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-10-04 12:34:21,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:34:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:34:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:34:21,392 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 12:34:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:21,530 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:34:21,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:34:21,531 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 12:34:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:21,532 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:34:21,532 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:34:21,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:34:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:34:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:34:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:34:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:34:21,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 12:34:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:21,535 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:34:21,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:34:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:34:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:34:21,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:21,535 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 12:34:21,536 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:21,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-04 12:34:21,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:21,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:21,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:21,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:21,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:24,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:24,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:24,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:24,864 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:34:24,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:24,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:24,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:24,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-10-04 12:34:24,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:34:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:34:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:34:24,919 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-04 12:34:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:25,056 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 12:34:25,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:34:25,058 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-04 12:34:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:25,058 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:34:25,059 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:34:25,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:34:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:34:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:34:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:34:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 12:34:25,062 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 12:34:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:25,062 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 12:34:25,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:34:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 12:34:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:34:25,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:25,063 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-04 12:34:25,063 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:25,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-04 12:34:25,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:25,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:25,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:25,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:25,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:27,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:27,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:27,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:28,016 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 12:34:28,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:28,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:28,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:28,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-10-04 12:34:28,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:34:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:34:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:34:28,160 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 12:34:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:28,381 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:34:28,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:34:28,381 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 12:34:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:28,382 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:34:28,382 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:34:28,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:34:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:34:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:34:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:34:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:34:28,386 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 12:34:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:28,386 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:34:28,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:34:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:34:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:34:28,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:28,387 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 12:34:28,387 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:28,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-04 12:34:28,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:28,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:28,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:28,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:28,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:30,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:30,672 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 [2018-10-04 12:34:30,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:30,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:30,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:30,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-10-04 12:34:30,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:34:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:34:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:34:30,765 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-04 12:34:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:30,883 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 12:34:30,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:34:30,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-04 12:34:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:30,885 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:34:30,885 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:34:30,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:34:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:34:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:34:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:34:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 12:34:30,888 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 12:34:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:30,889 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 12:34:30,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:34:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 12:34:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:34:30,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:30,890 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-04 12:34:30,890 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:30,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-04 12:34:30,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:30,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:30,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:30,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:30,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:32,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:32,872 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 [2018-10-04 12:34:32,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:32,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:32,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:32,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:32,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:32,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-10-04 12:34:32,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:34:32,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:34:32,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:34:32,983 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 12:34:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:33,322 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:34:33,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:34:33,323 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 12:34:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:33,323 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:34:33,324 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:34:33,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:34:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:34:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:34:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:34:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:34:33,327 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 12:34:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:33,327 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:34:33,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:34:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:34:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:34:33,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:33,328 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 12:34:33,328 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:33,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-04 12:34:33,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:33,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:33,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:33,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:33,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:35,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:35,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:35,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:35,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:34:35,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:35,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:35,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:35,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-10-04 12:34:35,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:34:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:34:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:34:35,955 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-04 12:34:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:36,738 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 12:34:36,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:34:36,738 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-04 12:34:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:36,739 INFO L225 Difference]: With dead ends: 76 [2018-10-04 12:34:36,740 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:34:36,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:34:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:34:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:34:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:34:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 12:34:36,744 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 12:34:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:36,744 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 12:34:36,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:34:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 12:34:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:34:36,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:36,745 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-04 12:34:36,745 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:36,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-04 12:34:36,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:36,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:36,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:36,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:39,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:39,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:39,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:39,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:39,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:39,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:39,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:39,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-10-04 12:34:39,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:34:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:34:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:34:39,625 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 12:34:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:39,801 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:34:39,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:34:39,802 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 12:34:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:39,802 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:34:39,802 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:34:39,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:34:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:34:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:34:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:34:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:34:39,806 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 12:34:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:39,806 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:34:39,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:34:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:34:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:34:39,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:39,807 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 12:34:39,807 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:39,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-04 12:34:39,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:39,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:39,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:39,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:39,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:42,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:42,054 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 [2018-10-04 12:34:42,062 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:42,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:34:42,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:42,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:42,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:42,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-10-04 12:34:42,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:34:42,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:34:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:34:42,194 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-04 12:34:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:42,484 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 12:34:42,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:34:42,485 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-04 12:34:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:42,486 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:34:42,486 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:34:42,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:34:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:34:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:34:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:34:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 12:34:42,490 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 12:34:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:42,491 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 12:34:42,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:34:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 12:34:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:34:42,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:42,492 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-04 12:34:42,492 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:42,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:42,492 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-04 12:34:42,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:42,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:42,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:42,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:42,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:45,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:45,004 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 [2018-10-04 12:34:45,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:45,108 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:34:45,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:45,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:45,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:45,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-10-04 12:34:45,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:34:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:34:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:34:45,172 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 12:34:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:45,272 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:34:45,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:34:45,272 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 12:34:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:45,273 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:34:45,273 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:34:45,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:34:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:34:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:34:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:34:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:34:45,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 12:34:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:45,276 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:34:45,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:34:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:34:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:34:45,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:45,277 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 12:34:45,277 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:45,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-04 12:34:45,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:45,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:45,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:45,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:45,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:47,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:47,607 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 [2018-10-04 12:34:47,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:47,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:47,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:47,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-10-04 12:34:47,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:34:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:34:47,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:34:47,719 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-04 12:34:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:47,887 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 12:34:47,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:34:47,888 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-04 12:34:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:47,889 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:34:47,889 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:34:47,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:34:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:34:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:34:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:34:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 12:34:47,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 12:34:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:47,891 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 12:34:47,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:34:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 12:34:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:34:47,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:47,892 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-04 12:34:47,892 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:47,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-04 12:34:47,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:47,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:47,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:47,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:47,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:50,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:50,423 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 [2018-10-04 12:34:50,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:50,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:50,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:50,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:50,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:50,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-10-04 12:34:50,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:34:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:34:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:34:50,520 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 12:34:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:50,670 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:34:50,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:34:50,671 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 12:34:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:50,672 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:34:50,672 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:34:50,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:34:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:34:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:34:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:34:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:34:50,676 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 12:34:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:50,676 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:34:50,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:34:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:34:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:34:50,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:50,677 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 12:34:50,677 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:50,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-04 12:34:50,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:50,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:50,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:50,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:50,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:53,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:53,069 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 [2018-10-04 12:34:53,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:53,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:34:53,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:53,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:53,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:53,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-10-04 12:34:53,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:34:53,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:34:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:34:53,278 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-04 12:34:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:53,402 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 12:34:53,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:34:53,403 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-04 12:34:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:53,404 INFO L225 Difference]: With dead ends: 82 [2018-10-04 12:34:53,404 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:34:53,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:34:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:34:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 12:34:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:34:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 12:34:53,408 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 12:34:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:53,408 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 12:34:53,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:34:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 12:34:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:34:53,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:53,409 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-04 12:34:53,409 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:53,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-04 12:34:53,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:53,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:53,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:53,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:53,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:56,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:56,155 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 [2018-10-04 12:34:56,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:56,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:56,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:56,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:56,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:56,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-10-04 12:34:56,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:34:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:34:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:34:56,251 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 12:34:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:57,160 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:34:57,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:34:57,161 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 12:34:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:57,162 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:34:57,162 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:34:57,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:34:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:34:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:34:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:34:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:34:57,165 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 12:34:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:57,165 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:34:57,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:34:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:34:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:34:57,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:57,166 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-04 12:34:57,166 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:57,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:57,166 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-04 12:34:57,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:57,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:57,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:57,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:57,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:59,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:59,967 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 [2018-10-04 12:34:59,976 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:00,042 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:35:00,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:00,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:00,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:00,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-10-04 12:35:00,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:35:00,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:35:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:35:00,088 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-10-04 12:35:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:00,207 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 12:35:00,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:35:00,208 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-10-04 12:35:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:00,208 INFO L225 Difference]: With dead ends: 84 [2018-10-04 12:35:00,209 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 12:35:00,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:35:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 12:35:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 12:35:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:35:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 12:35:00,212 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 12:35:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:00,212 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 12:35:00,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:35:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 12:35:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 12:35:00,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:00,213 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-04 12:35:00,213 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:00,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-04 12:35:00,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:00,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:00,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:00,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:00,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:02,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:02,774 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 [2018-10-04 12:35:02,783 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:02,848 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 12:35:02,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:02,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:02,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:02,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-10-04 12:35:02,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:35:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:35:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:35:02,910 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 12:35:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:03,061 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:35:03,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:35:03,062 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 12:35:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:03,062 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:35:03,063 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:35:03,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:35:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:35:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:35:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:35:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:35:03,067 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 12:35:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:03,067 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:35:03,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:35:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:35:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:35:03,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:03,067 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-04 12:35:03,067 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:03,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:03,068 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-04 12:35:03,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:03,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:03,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:03,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:03,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:05,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:05,964 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 [2018-10-04 12:35:05,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:06,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:06,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:06,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-10-04 12:35:06,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:35:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:35:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:35:06,120 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-10-04 12:35:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:06,277 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 12:35:06,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:35:06,277 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-10-04 12:35:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:06,278 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:35:06,278 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 12:35:06,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:35:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 12:35:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 12:35:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:35:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 12:35:06,282 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 12:35:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:06,283 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 12:35:06,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:35:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 12:35:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:35:06,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:06,283 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-04 12:35:06,284 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:06,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-04 12:35:06,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:06,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:06,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:06,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:06,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:08,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:08,940 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 [2018-10-04 12:35:08,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:08,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:08,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:08,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:09,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:09,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-10-04 12:35:09,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:35:09,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:35:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:35:09,153 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 12:35:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:10,012 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:35:10,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:35:10,013 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 12:35:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:10,013 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:35:10,013 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:35:10,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:35:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:35:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:35:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:35:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 12:35:10,017 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 12:35:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:10,018 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 12:35:10,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:35:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 12:35:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:35:10,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:10,018 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-04 12:35:10,018 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:10,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-04 12:35:10,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:10,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:10,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:10,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:10,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:13,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:13,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:13,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:13,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 12:35:13,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:13,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:13,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:13,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-10-04 12:35:13,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:35:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:35:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:35:13,324 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-10-04 12:35:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:13,522 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 12:35:13,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:35:13,522 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-10-04 12:35:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:13,523 INFO L225 Difference]: With dead ends: 88 [2018-10-04 12:35:13,523 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:35:13,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:35:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:35:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:35:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:35:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 12:35:13,528 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 12:35:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:13,528 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 12:35:13,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:35:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 12:35:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 12:35:13,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:13,529 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-04 12:35:13,529 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:13,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-04 12:35:13,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:13,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:13,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:13,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:13,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:16,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:16,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:16,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:16,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:16,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:16,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:16,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:16,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-10-04 12:35:16,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:35:16,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:35:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:35:16,963 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 12:35:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:17,605 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:35:17,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:35:17,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 12:35:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:17,606 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:35:17,606 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:35:17,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:35:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:35:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:35:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:35:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:35:17,610 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 12:35:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:17,610 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:35:17,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:35:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:35:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:35:17,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:17,611 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-04 12:35:17,611 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:17,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-04 12:35:17,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:17,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:17,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:20,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:20,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:20,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:20,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 12:35:20,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:20,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:20,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:20,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-10-04 12:35:20,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:35:20,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:35:20,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:35:20,908 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-10-04 12:35:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:21,189 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 12:35:21,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:35:21,190 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-10-04 12:35:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:21,190 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:35:21,190 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:35:21,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:35:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:35:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 12:35:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:35:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 12:35:21,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 12:35:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:21,193 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 12:35:21,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:35:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 12:35:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 12:35:21,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:21,194 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-04 12:35:21,194 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:21,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:21,194 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-04 12:35:21,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:21,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:21,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:21,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:21,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:24,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:24,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:24,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:24,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:35:24,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:24,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:24,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:24,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-10-04 12:35:24,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:35:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:35:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:35:24,279 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 12:35:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:24,474 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:35:24,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:35:24,475 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 12:35:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:24,476 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:35:24,476 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:35:24,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:35:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:35:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:35:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:35:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 12:35:24,479 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 12:35:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:24,479 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 12:35:24,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:35:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 12:35:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:35:24,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:24,480 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-04 12:35:24,480 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:24,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-04 12:35:24,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:24,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:24,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:27,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:27,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:27,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:27,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:27,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:27,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-10-04 12:35:27,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:35:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:35:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:35:27,854 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-10-04 12:35:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:27,990 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 12:35:27,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:35:27,990 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-10-04 12:35:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:27,991 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:35:27,991 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 12:35:27,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:35:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 12:35:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 12:35:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:35:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 12:35:27,995 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 12:35:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:27,995 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 12:35:27,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:35:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 12:35:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:35:27,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:27,996 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-04 12:35:27,996 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:27,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-04 12:35:27,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:27,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:27,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:27,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:27,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:31,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:31,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:31,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:31,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:31,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:31,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:31,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:31,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-10-04 12:35:31,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:35:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:35:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:35:31,473 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 12:35:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:31,682 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:35:31,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:35:31,683 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 12:35:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:31,683 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:35:31,683 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:35:31,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:35:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:35:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:35:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:35:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:35:31,686 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 12:35:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:31,686 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:35:31,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:35:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:35:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:35:31,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:31,687 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-04 12:35:31,687 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:31,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-04 12:35:31,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:31,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:31,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:31,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:31,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:34,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:34,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:34,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:34,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 12:35:34,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:34,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:34,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:34,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-10-04 12:35:34,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:35:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:35:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:35:34,971 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-10-04 12:35:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:35,151 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 12:35:35,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:35:35,151 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-10-04 12:35:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:35,152 INFO L225 Difference]: With dead ends: 94 [2018-10-04 12:35:35,152 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:35:35,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:35:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:35:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 12:35:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:35:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 12:35:35,155 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 12:35:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:35,156 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 12:35:35,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:35:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 12:35:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 12:35:35,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:35,156 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-04 12:35:35,156 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:35,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-04 12:35:35,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:35,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:35,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:35,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:35,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:38,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:38,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:38,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:38,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:38,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:38,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:38,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:38,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-10-04 12:35:38,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:35:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:35:38,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:35:38,603 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 12:35:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:38,819 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:35:38,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:35:38,820 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 12:35:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:38,820 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:35:38,821 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:35:38,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:35:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:35:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:35:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:35:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 12:35:38,824 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 12:35:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:38,824 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 12:35:38,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:35:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 12:35:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:35:38,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:38,825 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-04 12:35:38,825 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:38,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-04 12:35:38,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:38,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:38,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:38,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:38,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:42,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:42,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:42,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:42,536 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 12:35:42,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:42,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:42,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:42,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-10-04 12:35:42,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:35:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:35:42,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:35:42,680 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-10-04 12:35:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:42,890 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 12:35:42,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:35:42,890 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-10-04 12:35:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:42,891 INFO L225 Difference]: With dead ends: 96 [2018-10-04 12:35:42,891 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:35:42,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:35:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:35:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 12:35:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:35:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 12:35:42,894 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 12:35:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:42,894 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 12:35:42,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:35:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 12:35:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:35:42,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:42,895 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-04 12:35:42,895 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:42,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:42,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-04 12:35:42,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:42,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:42,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:42,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:42,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:46,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:46,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:46,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:46,601 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 12:35:46,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:46,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:46,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:46,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-10-04 12:35:46,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:35:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:35:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:35:46,657 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 12:35:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:46,812 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:35:46,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:35:46,812 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 12:35:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:46,813 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:35:46,813 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:35:46,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:35:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:35:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:35:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:35:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:35:46,818 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 12:35:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:46,818 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:35:46,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:35:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:35:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:35:46,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:46,819 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-04 12:35:46,819 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:46,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:46,819 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-04 12:35:46,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:46,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:46,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:46,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:46,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:50,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:50,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:50,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-10-04 12:35:50,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:35:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:35:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:35:50,350 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-10-04 12:35:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:50,524 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 12:35:50,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:35:50,525 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-10-04 12:35:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:50,525 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:35:50,525 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:35:50,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:35:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:35:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 12:35:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:35:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 12:35:50,528 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 12:35:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:50,528 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 12:35:50,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:35:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 12:35:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 12:35:50,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:50,529 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-04 12:35:50,529 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:50,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-04 12:35:50,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:50,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:50,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:50,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:54,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:54,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:54,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:54,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:54,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:54,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:54,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-10-04 12:35:54,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:35:54,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:35:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:35:54,356 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 12:35:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:54,521 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:35:54,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:35:54,521 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 12:35:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:54,522 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:35:54,522 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:35:54,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:35:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:35:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:35:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:35:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 12:35:54,525 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 12:35:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:54,526 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 12:35:54,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:35:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 12:35:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:35:54,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:54,526 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-04 12:35:54,526 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:54,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-04 12:35:54,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:54,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:54,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:54,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:58,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:58,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:58,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 12:35:58,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:58,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:58,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-10-04 12:35:58,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:35:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:35:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:35:58,612 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-10-04 12:35:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:58,776 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 12:35:58,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:35:58,776 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-10-04 12:35:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:58,777 INFO L225 Difference]: With dead ends: 100 [2018-10-04 12:35:58,777 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:35:58,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:35:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:35:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 12:35:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 12:35:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 12:35:58,780 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 12:35:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:58,781 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 12:35:58,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:35:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 12:35:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 12:35:58,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:58,781 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-04 12:35:58,782 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:58,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:58,782 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-04 12:35:58,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:58,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:58,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:58,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:02,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:02,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:02,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:02,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:02,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:02,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:03,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:03,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-10-04 12:36:03,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:36:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:36:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:36:03,013 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 12:36:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:03,187 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:36:03,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:36:03,188 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 12:36:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:03,189 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:36:03,189 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:36:03,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:36:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:36:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:36:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:36:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:36:03,193 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 12:36:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:03,193 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:36:03,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:36:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:36:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:36:03,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:03,194 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-04 12:36:03,194 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:03,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:03,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-04 12:36:03,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:03,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:03,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:03,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:07,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:07,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:07,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:07,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 12:36:07,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:07,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:07,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:07,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-10-04 12:36:07,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 12:36:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 12:36:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:36:07,347 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-10-04 12:36:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:07,558 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 12:36:07,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:36:07,558 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-10-04 12:36:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:07,559 INFO L225 Difference]: With dead ends: 102 [2018-10-04 12:36:07,559 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 12:36:07,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:36:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 12:36:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 12:36:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:36:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 12:36:07,562 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 12:36:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:07,562 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 12:36:07,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 12:36:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 12:36:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 12:36:07,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:07,564 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-04 12:36:07,564 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:07,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-04 12:36:07,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:07,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:07,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:07,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:07,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:11,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:11,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:11,572 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:11,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:36:11,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:11,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:11,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:11,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-10-04 12:36:11,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:36:11,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:36:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:36:11,716 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 12:36:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:12,312 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:36:12,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:36:12,313 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 12:36:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:12,313 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:36:12,313 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:36:12,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:36:12,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:36:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:36:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:36:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 12:36:12,317 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 12:36:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:12,317 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 12:36:12,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:36:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 12:36:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:36:12,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:12,317 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-04 12:36:12,318 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:12,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-04 12:36:12,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:12,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:12,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:12,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:12,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:16,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:16,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:16,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:16,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:16,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:16,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-10-04 12:36:16,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 12:36:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 12:36:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:36:16,586 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-10-04 12:36:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:16,803 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 12:36:16,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:36:16,804 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-10-04 12:36:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:16,805 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:36:16,805 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:36:16,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:36:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:36:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 12:36:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 12:36:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 12:36:16,808 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 12:36:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:16,808 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 12:36:16,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 12:36:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 12:36:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:36:16,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:16,809 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-04 12:36:16,809 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:16,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-04 12:36:16,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:16,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:16,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:16,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:16,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:20,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:20,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:20,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:20,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:20,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:20,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-10-04 12:36:20,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:36:20,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:36:20,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:36:20,940 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 12:36:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:21,281 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:36:21,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:36:21,282 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 12:36:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:21,282 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:36:21,282 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:36:21,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:36:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:36:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:36:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:36:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:36:21,285 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 12:36:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:21,285 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:36:21,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:36:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:36:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:36:21,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:21,286 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-04 12:36:21,286 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:21,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-04 12:36:21,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:21,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:21,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:21,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:21,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:25,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:25,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:25,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:25,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 12:36:25,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:25,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:25,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:25,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-10-04 12:36:25,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 12:36:25,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 12:36:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:36:25,782 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-10-04 12:36:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:25,963 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-04 12:36:25,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 12:36:25,963 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-10-04 12:36:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:25,964 INFO L225 Difference]: With dead ends: 106 [2018-10-04 12:36:25,964 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:36:25,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:36:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:36:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 12:36:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:36:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 12:36:25,968 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 12:36:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:25,969 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 12:36:25,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 12:36:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 12:36:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:36:25,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:25,969 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-04 12:36:25,970 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:25,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-04 12:36:25,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:25,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:25,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:25,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:25,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:30,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:30,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:30,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:30,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:30,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:30,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:30,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:30,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-10-04 12:36:30,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:36:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:36:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:36:30,476 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 12:36:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:30,686 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 12:36:30,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:36:30,686 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 12:36:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:30,687 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:36:30,688 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:36:30,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:36:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:36:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:36:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:36:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 12:36:30,692 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-04 12:36:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:30,692 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 12:36:30,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:36:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 12:36:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:36:30,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:30,693 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-04 12:36:30,693 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:30,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-04 12:36:30,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:30,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:30,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:35,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:35,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:35,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:35,479 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 12:36:35,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:35,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:35,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:35,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-10-04 12:36:35,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 12:36:35,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 12:36:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 12:36:35,534 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-10-04 12:36:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:35,822 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-04 12:36:35,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 12:36:35,822 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-10-04 12:36:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:35,824 INFO L225 Difference]: With dead ends: 108 [2018-10-04 12:36:35,824 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 12:36:35,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 12:36:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 12:36:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 12:36:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:36:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 12:36:35,828 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-04 12:36:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:35,828 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 12:36:35,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 12:36:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 12:36:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 12:36:35,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:35,829 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-04 12:36:35,829 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:35,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:35,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-04 12:36:35,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:35,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:35,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:35,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:35,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:40,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:40,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:40,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:40,642 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 12:36:40,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:40,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:40,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:40,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-10-04 12:36:40,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 12:36:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 12:36:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:36:40,701 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-04 12:36:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:40,960 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:36:40,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 12:36:40,960 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-04 12:36:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:40,961 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:36:40,961 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:36:40,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:36:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:36:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:36:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:36:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 12:36:40,965 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-04 12:36:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:40,965 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 12:36:40,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 12:36:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 12:36:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:36:40,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:40,966 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-04 12:36:40,966 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:40,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-04 12:36:40,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:40,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:40,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:40,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:45,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:45,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:45,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:45,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:45,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:45,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-10-04 12:36:45,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 12:36:45,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 12:36:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:36:45,749 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-10-04 12:36:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:46,035 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-04 12:36:46,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 12:36:46,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-10-04 12:36:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:46,037 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:36:46,037 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 12:36:46,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:36:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 12:36:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 12:36:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:36:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 12:36:46,041 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-04 12:36:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:46,041 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 12:36:46,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 12:36:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 12:36:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:36:46,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:46,041 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-04 12:36:46,042 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:46,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-04 12:36:46,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:46,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:46,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:46,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:46,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:50,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:50,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:50,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:50,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:50,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:50,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-10-04 12:36:50,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 12:36:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 12:36:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:36:50,960 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-04 12:36:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:51,270 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 12:36:51,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 12:36:51,271 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-04 12:36:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:51,272 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:36:51,272 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:36:51,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:36:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:36:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:36:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:36:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 12:36:51,276 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-04 12:36:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:51,276 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 12:36:51,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 12:36:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 12:36:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:36:51,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:51,277 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-04 12:36:51,277 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:51,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-04 12:36:51,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:51,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:51,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:51,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:51,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:56,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:56,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:56,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:56,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 12:36:56,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:56,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:56,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:56,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-10-04 12:36:56,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 12:36:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 12:36:56,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 12:36:56,310 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-10-04 12:36:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:56,555 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-04 12:36:56,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 12:36:56,556 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-10-04 12:36:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:56,556 INFO L225 Difference]: With dead ends: 112 [2018-10-04 12:36:56,556 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:36:56,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 12:36:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:36:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 12:36:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 12:36:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 12:36:56,561 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-04 12:36:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:56,561 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 12:36:56,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 12:36:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 12:36:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 12:36:56,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:56,562 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-04 12:36:56,562 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:56,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:56,562 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-04 12:36:56,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:56,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:56,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:56,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:56,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:01,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:01,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:01,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:01,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:01,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:01,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:01,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:01,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2018-10-04 12:37:01,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 12:37:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 12:37:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:37:01,618 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-04 12:37:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:01,814 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 12:37:01,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 12:37:01,814 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-04 12:37:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:01,815 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:37:01,815 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:37:01,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:37:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:37:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:37:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:37:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 12:37:01,820 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-04 12:37:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:01,820 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 12:37:01,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 12:37:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 12:37:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:37:01,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:01,821 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-04 12:37:01,821 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:01,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-04 12:37:01,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:01,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:01,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:01,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:01,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 12:37:04,742 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:37:04,746 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:37:04,746 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:37:04 BoogieIcfgContainer [2018-10-04 12:37:04,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:37:04,747 INFO L168 Benchmark]: Toolchain (without parser) took 236256.71 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -162.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 262.0 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. [2018-10-04 12:37:04,749 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 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. [2018-10-04 12:37:04,749 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.11 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. [2018-10-04 12:37:04,749 INFO L168 Benchmark]: Boogie Preprocessor took 22.18 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. [2018-10-04 12:37:04,749 INFO L168 Benchmark]: RCFGBuilder took 312.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:37:04,750 INFO L168 Benchmark]: TraceAbstraction took 235874.44 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -162.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 240.8 MB). Peak memory consumption was 78.3 MB. Max. memory is 7.1 GB. [2018-10-04 12:37:04,751 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.11 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 22.18 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 312.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235874.44 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -162.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 240.8 MB). Peak memory consumption was 78.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 111 with TraceHistMax 107, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 80 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 235.8s OverallTime, 108 OverallIterations, 107 TraceHistogramMax, 19.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 323 SDtfs, 2 SDslu, 4042 SDs, 0 SdLazy, 9970 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11768 GetRequests, 5884 SyntacticMatches, 0 SemanticMatches, 5884 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 197.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=107, 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, 107 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 201.8s InterpolantComputationTime, 11981 NumberOfCodeBlocks, 11981 NumberOfCodeBlocksAsserted, 1662 NumberOfCheckSat, 11768 ConstructedInterpolants, 0 QuantifiedInterpolants, 4186902 SizeOfPredicates, 212 NumberOfNonLiveVariables, 23638 ConjunctsInSsa, 5883 ConjunctsInUnsatCore, 213 InterpolantComputations, 1 PerfectInterpolantSequences, 0/408312 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/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-37-04-759.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-37-04-759.csv Completed graceful shutdown