java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:17:32,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:17:32,155 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:17:32,167 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-02 12:17:32,223 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:17:32,251 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:17:32,252 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:17:32,252 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:17:32,253 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:17:32,253 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:17:32,253 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:17:32,254 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:17:32,254 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:17:32,254 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:17:32,254 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:17:32,255 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:17:32,255 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:17:32,255 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:17:32,255 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:17:32,255 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:17:32,256 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:17:32,256 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:17:32,256 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:17:32,256 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:17:32,257 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:17:32,257 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:17:32,257 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:17:32,257 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:17:32,257 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:17:32,258 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:17:32,258 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:17:32,258 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:17:32,258 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:17:32,258 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:17:32,259 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:17:32,259 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:17:32,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:17:32,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:17:32,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:17:32,334 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:17:32,335 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:17:32,336 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-02 12:17:32,336 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-02 12:17:32,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:17:32,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:17:32,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:17:32,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:17:32,384 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:17:32,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:17:32,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:17:32,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:17:32,426 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:17:32,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/1) ... [2018-10-02 12:17:32,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:17:32,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:17:32,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:17:32,450 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:17:32,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (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 [2018-10-02 12:17:32,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 12:17:32,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:17:32,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:17:32,901 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:17:32,902 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:17:32 BoogieIcfgContainer [2018-10-02 12:17:32,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:17:32,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:17:32,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:17:32,907 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:17:32,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:32" (1/2) ... [2018-10-02 12:17:32,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456e1c1b and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:17:32, skipping insertion in model container [2018-10-02 12:17:32,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:17:32" (2/2) ... [2018-10-02 12:17:32,911 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-02 12:17:32,923 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:17:32,932 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:17:32,988 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:17:32,989 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:17:32,989 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:17:32,989 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:17:32,989 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:17:32,990 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:17:32,990 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:17:32,990 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:17:32,990 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:17:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-02 12:17:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:17:33,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:33,016 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 12:17:33,018 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:33,025 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-02 12:17:33,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:33,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:33,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:33,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:33,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:33,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:17:33,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 12:17:33,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:17:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:17:33,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:33,405 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-02 12:17:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:33,745 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-02 12:17:33,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:17:33,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 12:17:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:33,768 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:17:33,768 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:17:33,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:17:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-02 12:17:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:17:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-02 12:17:33,811 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-02 12:17:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:33,811 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-02 12:17:33,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:17:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-02 12:17:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:17:33,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:33,812 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:33,813 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:33,813 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-02 12:17:33,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:33,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:33,911 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:17:33,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-02 12:17:33,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:17:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:17:33,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:33,914 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-02 12:17:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:34,257 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-02 12:17:34,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:17:34,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-02 12:17:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:34,259 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:17:34,259 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:17:34,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:17:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:17:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-02 12:17:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:17:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-02 12:17:34,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-02 12:17:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:34,267 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-02 12:17:34,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:17:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-02 12:17:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:17:34,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:34,269 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:34,269 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:34,269 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-02 12:17:34,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:34,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:34,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:34,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:34,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-02 12:17:34,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:17:34,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 12:17:34,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:17:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:17:34,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:34,327 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-02 12:17:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:34,401 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-02 12:17:34,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:17:34,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-02 12:17:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:34,403 INFO L225 Difference]: With dead ends: 24 [2018-10-02 12:17:34,403 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:17:34,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:17:34,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:17:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-02 12:17:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 12:17:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-02 12:17:34,408 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-02 12:17:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:34,408 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-02 12:17:34,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:17:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-02 12:17:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:17:34,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:34,409 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:34,409 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:34,410 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-02 12:17:34,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:34,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:34,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:34,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:34,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:34,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:34,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:17:34,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:34,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:35,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:35,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-02 12:17:35,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:17:35,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:17:35,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:35,011 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-02 12:17:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:35,944 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-02 12:17:35,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:17:35,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-02 12:17:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:35,947 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:17:35,947 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:17:35,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:17:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:17:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-02 12:17:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 12:17:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-02 12:17:35,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-02 12:17:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:35,952 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-02 12:17:35,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:17:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-02 12:17:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 12:17:35,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:35,953 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:35,953 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:35,953 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-02 12:17:35,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:35,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:35,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:35,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:35,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:36,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:36,022 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 [2018-10-02 12:17:36,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:36,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:36,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:36,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-02 12:17:36,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:17:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:17:36,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:36,159 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-02 12:17:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:36,406 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-02 12:17:36,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:17:36,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 12:17:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:36,407 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:17:36,408 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:17:36,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:17:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:17:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-02 12:17:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:17:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-02 12:17:36,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-02 12:17:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:36,412 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-02 12:17:36,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:17:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-02 12:17:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:17:36,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:36,413 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:36,414 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:36,414 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-02 12:17:36,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:36,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:36,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:36,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:36,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:36,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:36,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:17:36,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:36,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:36,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:36,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:36,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:36,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-02 12:17:36,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:17:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:17:36,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:36,832 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-02 12:17:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:38,298 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-02 12:17:38,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:17:38,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-02 12:17:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:38,300 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:17:38,300 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:17:38,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:17:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:17:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-02 12:17:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 12:17:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-02 12:17:38,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-02 12:17:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:38,307 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-02 12:17:38,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:17:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-02 12:17:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 12:17:38,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:38,308 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-02 12:17:38,309 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:38,309 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-02 12:17:38,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:38,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:38,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:38,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:38,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:38,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:38,442 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 [2018-10-02 12:17:38,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:38,464 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:17:38,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:38,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:38,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:38,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-02 12:17:38,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:17:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:17:38,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:38,578 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-02 12:17:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:39,616 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-02 12:17:39,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:17:39,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-02 12:17:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:39,623 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:17:39,623 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:17:39,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:17:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-02 12:17:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 12:17:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-02 12:17:39,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-02 12:17:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:39,630 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-02 12:17:39,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:17:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-02 12:17:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 12:17:39,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:39,632 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-02 12:17:39,632 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:39,632 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-02 12:17:39,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:39,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:39,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:39,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:39,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:39,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:39,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:17:39,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:39,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:39,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:39,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:39,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:39,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-02 12:17:39,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:17:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:17:39,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:39,992 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-02 12:17:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:40,583 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-02 12:17:40,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:17:40,584 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-02 12:17:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:40,585 INFO L225 Difference]: With dead ends: 60 [2018-10-02 12:17:40,585 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:17:40,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:17:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:17:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-02 12:17:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:17:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-02 12:17:40,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-02 12:17:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:40,594 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-02 12:17:40,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:17:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-02 12:17:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:17:40,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:40,596 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-02 12:17:40,596 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:40,596 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-02 12:17:40,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:40,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:40,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:40,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:40,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:40,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:40,908 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 [2018-10-02 12:17:40,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:17:40,928 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-02 12:17:40,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:40,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:41,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:41,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-02 12:17:41,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:17:41,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:17:41,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:41,633 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-02 12:17:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:43,501 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-02 12:17:43,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:17:43,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-02 12:17:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:43,504 INFO L225 Difference]: With dead ends: 64 [2018-10-02 12:17:43,504 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 12:17:43,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime [2018-10-02 12:17:43,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 12:17:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-02 12:17:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:17:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-02 12:17:43,511 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-02 12:17:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:43,512 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-02 12:17:43,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:17:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-02 12:17:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:17:43,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:43,513 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-02 12:17:43,513 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:43,513 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-02 12:17:43,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:43,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:43,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:43,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:43,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:43,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:43,679 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 [2018-10-02 12:17:43,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:17:43,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 12:17:43,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:43,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:44,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:44,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-02 12:17:44,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:17:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:17:44,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:44,011 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-02 12:17:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:44,513 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-02 12:17:44,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:17:44,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-02 12:17:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:44,514 INFO L225 Difference]: With dead ends: 75 [2018-10-02 12:17:44,514 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 12:17:44,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:17:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 12:17:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-02 12:17:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 12:17:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-02 12:17:44,524 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-02 12:17:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:44,525 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-02 12:17:44,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:17:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-02 12:17:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 12:17:44,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:44,526 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-02 12:17:44,526 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:44,526 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-02 12:17:44,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:44,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:44,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:44,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:44,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:44,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:44,727 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 [2018-10-02 12:17:44,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:44,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:45,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:45,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-02 12:17:45,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:17:45,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:17:45,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:45,026 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-02 12:17:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:47,497 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-02 12:17:47,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:17:47,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-02 12:17:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:47,499 INFO L225 Difference]: With dead ends: 79 [2018-10-02 12:17:47,499 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 12:17:47,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime [2018-10-02 12:17:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 12:17:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-02 12:17:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 12:17:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-02 12:17:47,507 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-02 12:17:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:47,507 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-02 12:17:47,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:17:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-02 12:17:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 12:17:47,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:47,509 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-02 12:17:47,509 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:47,509 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-02 12:17:47,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:47,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:47,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:47,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:47,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:47,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:47,660 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 [2018-10-02 12:17:47,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:47,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:47,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:47,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:48,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:48,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-02 12:17:48,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:17:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:17:48,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:48,109 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-02 12:17:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:48,734 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-02 12:17:48,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:17:48,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-02 12:17:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:48,736 INFO L225 Difference]: With dead ends: 90 [2018-10-02 12:17:48,736 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 12:17:48,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime [2018-10-02 12:17:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 12:17:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-02 12:17:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 12:17:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-02 12:17:48,744 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-02 12:17:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:48,745 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-02 12:17:48,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:17:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-02 12:17:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 12:17:48,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:48,746 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-02 12:17:48,746 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:48,746 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:48,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-02 12:17:48,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:48,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:48,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:48,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:48,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:48,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:48,994 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 [2018-10-02 12:17:49,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:49,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 12:17:49,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:49,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:49,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:49,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-02 12:17:49,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 12:17:49,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 12:17:49,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:49,427 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-02 12:17:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:54,870 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-02 12:17:54,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:17:54,871 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-02 12:17:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:54,872 INFO L225 Difference]: With dead ends: 116 [2018-10-02 12:17:54,872 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 12:17:54,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime [2018-10-02 12:17:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 12:17:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-02 12:17:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 12:17:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-02 12:17:54,882 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-02 12:17:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:54,883 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-02 12:17:54,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 12:17:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-02 12:17:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 12:17:54,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:54,884 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-02 12:17:54,884 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:54,884 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-02 12:17:54,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:54,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:54,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:55,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:55,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:17:55,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:55,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:55,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:55,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:55,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:55,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-02 12:17:55,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:17:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:17:55,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:55,475 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-02 12:17:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:59,565 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-02 12:17:59,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:17:59,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-02 12:17:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:59,567 INFO L225 Difference]: With dead ends: 109 [2018-10-02 12:17:59,568 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 12:17:59,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime [2018-10-02 12:17:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 12:17:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-02 12:17:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 12:17:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-02 12:17:59,579 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-02 12:17:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:59,579 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-02 12:17:59,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:17:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-02 12:17:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 12:17:59,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:59,581 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-02 12:17:59,581 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:59,581 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-02 12:17:59,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:59,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:59,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:59,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:59,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:00,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:00,051 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 [2018-10-02 12:18:00,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:00,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 12:18:00,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:00,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:00,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:00,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-02 12:18:00,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:18:00,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:18:00,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:00,462 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-02 12:18:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:01,532 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-02 12:18:01,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:18:01,532 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-02 12:18:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:01,533 INFO L225 Difference]: With dead ends: 120 [2018-10-02 12:18:01,533 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 12:18:01,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime [2018-10-02 12:18:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 12:18:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-02 12:18:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 12:18:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-02 12:18:01,544 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-02 12:18:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:01,544 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-02 12:18:01,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:18:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-02 12:18:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 12:18:01,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:01,545 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-02 12:18:01,546 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:01,546 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:01,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-02 12:18:01,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:01,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:01,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:01,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:01,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:02,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:02,163 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 [2018-10-02 12:18:02,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:02,202 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 12:18:02,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:02,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:02,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:02,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-02 12:18:02,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:18:02,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:18:02,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:02,622 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-02 12:18:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:07,808 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-02 12:18:07,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:18:07,808 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-02 12:18:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:07,809 INFO L225 Difference]: With dead ends: 124 [2018-10-02 12:18:07,810 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 12:18:07,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:18:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 12:18:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-02 12:18:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 12:18:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-02 12:18:07,820 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-02 12:18:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:07,821 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-02 12:18:07,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:18:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-02 12:18:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 12:18:07,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:07,822 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-02 12:18:07,822 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:07,822 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-02 12:18:07,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:07,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:07,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:07,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:08,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:08,167 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 [2018-10-02 12:18:08,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:08,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:08,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:08,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-02 12:18:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:18:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:18:08,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:08,431 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-02 12:18:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:09,759 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-02 12:18:09,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:18:09,764 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-02 12:18:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:09,765 INFO L225 Difference]: With dead ends: 135 [2018-10-02 12:18:09,765 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 12:18:09,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:18:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 12:18:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-02 12:18:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 12:18:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-02 12:18:09,777 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-02 12:18:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:09,777 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-02 12:18:09,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:18:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-02 12:18:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 12:18:09,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:09,782 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-02 12:18:09,782 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:09,782 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-02 12:18:09,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:09,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:09,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:09,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:09,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:10,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:10,475 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 [2018-10-02 12:18:10,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:10,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:10,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:10,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:11,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:11,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-02 12:18:11,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 12:18:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 12:18:11,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:11,133 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-02 12:18:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:17,629 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-02 12:18:17,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 12:18:17,629 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-02 12:18:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:17,630 INFO L225 Difference]: With dead ends: 173 [2018-10-02 12:18:17,630 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 12:18:17,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.2s impTime [2018-10-02 12:18:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 12:18:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-02 12:18:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 12:18:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-02 12:18:17,640 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-02 12:18:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:17,641 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-02 12:18:17,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 12:18:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-02 12:18:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 12:18:17,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:17,642 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-02 12:18:17,642 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:17,642 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-02 12:18:17,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:17,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:17,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:17,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:17,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:18,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:18,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:18:18,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:18,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-02 12:18:18,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:18,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:18,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:18,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-02 12:18:18,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:18:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:18:18,860 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:18,861 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-02 12:18:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:25,986 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-02 12:18:25,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 12:18:25,987 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-02 12:18:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:25,988 INFO L225 Difference]: With dead ends: 192 [2018-10-02 12:18:25,988 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 12:18:25,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime [2018-10-02 12:18:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 12:18:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-02 12:18:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 12:18:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-02 12:18:25,999 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-02 12:18:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:25,999 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-02 12:18:25,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:18:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-02 12:18:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 12:18:26,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:26,000 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-02 12:18:26,001 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:26,001 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-02 12:18:26,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:26,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:26,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:26,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:26,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:26,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:26,557 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 [2018-10-02 12:18:26,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:26,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:26,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:26,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:26,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:26,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-02 12:18:26,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:18:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:18:26,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:26,955 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-02 12:18:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:36,877 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-02 12:18:36,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:18:36,878 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-02 12:18:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:36,879 INFO L225 Difference]: With dead ends: 169 [2018-10-02 12:18:36,879 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 12:18:36,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime [2018-10-02 12:18:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 12:18:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-02 12:18:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 12:18:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-02 12:18:36,890 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-02 12:18:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:36,890 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-02 12:18:36,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:18:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-02 12:18:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 12:18:36,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:36,891 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-02 12:18:36,891 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:36,891 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:36,891 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-02 12:18:36,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:36,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:36,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:36,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:36,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:37,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:37,249 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 [2018-10-02 12:18:37,256 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:37,276 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:18:37,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:37,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:37,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:37,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-02 12:18:37,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:18:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:18:37,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:37,577 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-02 12:18:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:39,526 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-02 12:18:39,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:18:39,527 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-02 12:18:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:39,528 INFO L225 Difference]: With dead ends: 180 [2018-10-02 12:18:39,528 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 12:18:39,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime [2018-10-02 12:18:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 12:18:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-02 12:18:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 12:18:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-02 12:18:39,539 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-02 12:18:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:39,539 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-02 12:18:39,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:18:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-02 12:18:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 12:18:39,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:39,540 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-02 12:18:39,540 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:39,540 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-02 12:18:39,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:39,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:39,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:39,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:39,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:40,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:40,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:18:40,144 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:40,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:18:40,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:40,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:40,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:40,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-02 12:18:40,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:18:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:18:40,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:40,620 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-02 12:18:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:50,499 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-02 12:18:50,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:18:50,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-02 12:18:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:50,503 INFO L225 Difference]: With dead ends: 184 [2018-10-02 12:18:50,503 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 12:18:50,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime [2018-10-02 12:18:50,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 12:18:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-02 12:18:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 12:18:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-02 12:18:50,517 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-02 12:18:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:50,517 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-02 12:18:50,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:18:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-02 12:18:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 12:18:50,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:50,519 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-02 12:18:50,519 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:50,519 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-02 12:18:50,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:50,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:50,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:50,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:50,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:51,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:51,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:18:51,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:51,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:52,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:52,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-02 12:18:52,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:18:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:18:52,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:52,087 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-02 12:18:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:54,331 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-02 12:18:54,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:18:54,332 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-02 12:18:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:54,333 INFO L225 Difference]: With dead ends: 195 [2018-10-02 12:18:54,333 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 12:18:54,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime [2018-10-02 12:18:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 12:18:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-02 12:18:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 12:18:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-02 12:18:54,346 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-02 12:18:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:54,346 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-02 12:18:54,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:18:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-02 12:18:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 12:18:54,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:54,347 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-02 12:18:54,347 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:54,347 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-02 12:18:54,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:54,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:54,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:54,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:54,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:55,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:55,658 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 [2018-10-02 12:18:55,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:55,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:55,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:55,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:56,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:56,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-02 12:18:56,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:18:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:18:56,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:56,611 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-02 12:19:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:07,818 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-02 12:19:07,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 12:19:07,819 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-02 12:19:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:07,820 INFO L225 Difference]: With dead ends: 249 [2018-10-02 12:19:07,820 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 12:19:07,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.1s impTime [2018-10-02 12:19:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 12:19:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-02 12:19:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 12:19:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-02 12:19:07,837 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-02 12:19:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:07,837 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-02 12:19:07,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:19:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-02 12:19:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 12:19:07,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:07,838 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-02 12:19:07,838 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:07,839 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-02 12:19:07,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:07,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:07,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:07,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:07,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:08,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:08,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:19:09,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:09,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 12:19:09,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:09,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:09,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:09,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-02 12:19:09,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:19:09,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:19:09,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:09,779 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-02 12:19:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:23,780 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-02 12:19:23,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:19:23,781 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-02 12:19:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:23,783 INFO L225 Difference]: With dead ends: 214 [2018-10-02 12:19:23,783 INFO L226 Difference]: Without dead ends: 160 [2018-10-02 12:19:23,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.4s impTime [2018-10-02 12:19:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-02 12:19:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-02 12:19:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 12:19:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-02 12:19:23,800 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-02 12:19:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:23,801 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-02 12:19:23,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:19:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-02 12:19:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 12:19:23,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:23,802 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-02 12:19:23,802 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:23,802 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-02 12:19:23,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:23,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:23,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:23,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:23,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:24,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:24,522 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 [2018-10-02 12:19:24,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:24,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:24,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:24,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:24,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:24,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-02 12:19:24,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:19:24,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:19:24,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:24,955 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-02 12:19:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:27,660 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-02 12:19:27,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:19:27,660 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-02 12:19:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:27,661 INFO L225 Difference]: With dead ends: 225 [2018-10-02 12:19:27,661 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 12:19:27,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime [2018-10-02 12:19:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 12:19:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-02 12:19:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 12:19:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-02 12:19:27,678 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-02 12:19:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:27,678 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-02 12:19:27,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:19:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-02 12:19:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 12:19:27,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:27,679 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-02 12:19:27,679 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:27,679 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-02 12:19:27,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:27,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:27,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:27,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:27,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:28,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:28,497 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 [2018-10-02 12:19:28,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:28,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 12:19:28,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:28,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:29,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:29,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-02 12:19:29,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:19:29,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:19:29,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:29,106 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-02 12:19:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:42,609 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-02 12:19:42,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 12:19:42,618 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-02 12:19:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:42,619 INFO L225 Difference]: With dead ends: 229 [2018-10-02 12:19:42,619 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 12:19:42,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime [2018-10-02 12:19:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 12:19:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-02 12:19:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 12:19:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-02 12:19:42,642 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-02 12:19:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:42,642 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-02 12:19:42,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:19:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-02 12:19:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 12:19:42,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:42,643 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-02 12:19:42,643 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:42,643 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-02 12:19:42,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:42,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:42,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:42,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:42,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:43,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:43,091 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 [2018-10-02 12:19:43,099 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:43,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 12:19:43,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:43,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:43,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:43,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-02 12:19:43,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:19:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:19:43,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:43,526 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-02 12:19:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:47,395 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-02 12:19:47,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:19:47,396 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-02 12:19:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:47,397 INFO L225 Difference]: With dead ends: 240 [2018-10-02 12:19:47,397 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 12:19:47,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:19:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 12:19:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-02 12:19:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 12:19:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-02 12:19:47,414 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-02 12:19:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:47,414 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-02 12:19:47,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:19:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-02 12:19:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 12:19:47,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:47,415 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-02 12:19:47,415 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:47,415 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-02 12:19:47,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:47,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:47,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:47,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:47,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:48,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:48,273 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 [2018-10-02 12:19:48,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:48,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:49,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:49,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-02 12:19:49,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 12:19:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 12:19:49,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:49,073 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-02 12:20:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:04,372 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-02 12:20:04,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 12:20:04,372 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-02 12:20:04,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:04,373 INFO L225 Difference]: With dead ends: 244 [2018-10-02 12:20:04,374 INFO L226 Difference]: Without dead ends: 182 [2018-10-02 12:20:04,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime [2018-10-02 12:20:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-02 12:20:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-02 12:20:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 12:20:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-02 12:20:04,392 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-02 12:20:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:04,392 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-02 12:20:04,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 12:20:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-02 12:20:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 12:20:04,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:04,393 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-02 12:20:04,393 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:04,393 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-02 12:20:04,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:04,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:04,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:04,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:04,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:04,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:04,914 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 [2018-10-02 12:20:04,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:20:04,950 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:20:04,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:04,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:05,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:05,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-02 12:20:05,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 12:20:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 12:20:05,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:05,593 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-02 12:20:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:08,966 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-02 12:20:08,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:20:08,968 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-02 12:20:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:08,969 INFO L225 Difference]: With dead ends: 255 [2018-10-02 12:20:08,969 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 12:20:08,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime [2018-10-02 12:20:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 12:20:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-02 12:20:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 12:20:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-02 12:20:08,985 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-02 12:20:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:08,986 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-02 12:20:08,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 12:20:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-02 12:20:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-02 12:20:08,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:08,986 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-02 12:20:08,986 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:08,987 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-02 12:20:08,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:08,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:08,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:08,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:08,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:10,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:10,445 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 [2018-10-02 12:20:10,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:20:10,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 12:20:10,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:10,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:11,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:11,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-02 12:20:11,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 12:20:11,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 12:20:11,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:11,820 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-02 12:20:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:28,817 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-02 12:20:28,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-02 12:20:28,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-02 12:20:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:28,819 INFO L225 Difference]: With dead ends: 325 [2018-10-02 12:20:28,819 INFO L226 Difference]: Without dead ends: 190 [2018-10-02 12:20:28,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time 5.2s impTime [2018-10-02 12:20:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-02 12:20:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-02 12:20:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 12:20:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-02 12:20:28,846 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-02 12:20:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:28,847 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-02 12:20:28,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 12:20:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-02 12:20:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 12:20:28,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:28,848 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-02 12:20:28,848 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:28,848 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-02 12:20:28,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:28,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:28,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:28,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:28,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:29,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:29,926 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 [2018-10-02 12:20:29,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:20:29,967 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:20:29,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:29,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:30,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:30,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-02 12:20:30,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:20:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:20:30,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:30,864 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-02 12:20:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:53,317 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-02 12:20:53,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 12:20:53,317 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-02 12:20:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:53,318 INFO L225 Difference]: With dead ends: 274 [2018-10-02 12:20:53,318 INFO L226 Difference]: Without dead ends: 204 [2018-10-02 12:20:53,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.6s impTime [2018-10-02 12:20:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-02 12:20:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-02 12:20:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 12:20:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-02 12:20:53,345 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-02 12:20:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:53,346 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-02 12:20:53,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:20:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-02 12:20:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 12:20:53,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:53,347 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-02 12:20:53,347 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:53,347 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-02 12:20:53,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:53,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:53,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:53,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:53,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:54,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:54,164 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 [2018-10-02 12:20:54,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:20:54,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 12:20:54,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:54,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:55,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:55,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-02 12:20:55,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:20:55,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:20:55,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:55,121 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-02 12:20:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:59,473 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-02 12:20:59,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:20:59,474 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-02 12:20:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:59,475 INFO L225 Difference]: With dead ends: 285 [2018-10-02 12:20:59,475 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 12:20:59,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime [2018-10-02 12:20:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 12:20:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-02 12:20:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 12:20:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-02 12:20:59,499 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-02 12:20:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:59,499 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-02 12:20:59,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:20:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-02 12:20:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 12:20:59,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:59,500 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-02 12:20:59,500 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:59,500 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-02 12:20:59,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:59,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:59,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:59,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:59,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:00,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:00,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:00,936 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:00,969 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 12:21:00,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:00,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:02,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:02,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-02 12:21:02,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 12:21:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 12:21:02,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:02,835 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-02 12:21:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:25,156 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-02 12:21:25,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-02 12:21:25,156 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-02 12:21:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:25,158 INFO L225 Difference]: With dead ends: 363 [2018-10-02 12:21:25,158 INFO L226 Difference]: Without dead ends: 212 [2018-10-02 12:21:25,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s Time 7.0s impTime [2018-10-02 12:21:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-02 12:21:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-02 12:21:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 12:21:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-02 12:21:25,187 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-02 12:21:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:25,187 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-02 12:21:25,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 12:21:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-02 12:21:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 12:21:25,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:25,188 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-02 12:21:25,188 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:25,188 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:25,188 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-02 12:21:25,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:25,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:25,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:25,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:25,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:26,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:26,592 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 [2018-10-02 12:21:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:26,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:28,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:28,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-02 12:21:28,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 12:21:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 12:21:28,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:28,555 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. Received shutdown request... [2018-10-02 12:21:40,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:21:40,621 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:21:40,628 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:21:40,628 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:21:40 BoogieIcfgContainer [2018-10-02 12:21:40,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:21:40,629 INFO L168 Benchmark]: Toolchain (without parser) took 248249.32 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -101.7 MB). Free memory was 1.5 GB in the beginning and 950.3 MB in the end (delta: 507.5 MB). Peak memory consumption was 405.8 MB. Max. memory is 7.1 GB. [2018-10-02 12:21:40,631 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:21:40,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.31 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. [2018-10-02 12:21:40,632 INFO L168 Benchmark]: Boogie Preprocessor took 23.68 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. [2018-10-02 12:21:40,633 INFO L168 Benchmark]: RCFGBuilder took 451.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:21:40,633 INFO L168 Benchmark]: TraceAbstraction took 247725.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -101.7 MB). Free memory was 1.4 GB in the beginning and 950.3 MB in the end (delta: 486.3 MB). Peak memory consumption was 384.6 MB. Max. memory is 7.1 GB. [2018-10-02 12:21:40,637 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.68 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 451.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247725.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -101.7 MB). Free memory was 1.4 GB in the beginning and 950.3 MB in the end (delta: 486.3 MB). Peak memory consumption was 384.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (143states) and FLOYD_HOARE automaton (currently 35 states, 65 states before enhancement), while ReachableStatesComputation was computing reachable states (85 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 247.6s OverallTime, 35 OverallIterations, 20 TraceHistogramMax, 207.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 493 SDtfs, 2477 SDslu, 9087 SDs, 0 SdLazy, 47605 SolverSat, 965 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3920 GetRequests, 1927 SyntacticMatches, 13 SemanticMatches, 1980 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 34 MinimizatonAttempts, 734 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 36.8s InterpolantComputationTime, 4784 NumberOfCodeBlocks, 4729 NumberOfCodeBlocksAsserted, 235 NumberOfCheckSat, 4717 ConstructedInterpolants, 0 QuantifiedInterpolants, 3534432 SizeOfPredicates, 103 NumberOfNonLiveVariables, 3517 ConjunctsInSsa, 1045 ConjunctsInUnsatCore, 67 InterpolantComputations, 3 PerfectInterpolantSequences, 8051/28786 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/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-21-40-653.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-21-40-653.csv Completed graceful shutdown