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/20170304-DifficultPathPrograms/up.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:17:12,597 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:17:12,600 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:17:12,614 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:17:12,615 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:17:12,616 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:17:12,617 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:17:12,619 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:17:12,620 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:17:12,621 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:17:12,622 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:17:12,622 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:17:12,623 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:17:12,624 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:17:12,626 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:17:12,626 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:17:12,627 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:17:12,629 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:17:12,631 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:17:12,633 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:17:12,634 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:17:12,635 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:17:12,638 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 12:17:12,647 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 12:17:12,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:17:12,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:17:12,663 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:17:12,663 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:17:12,664 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:17:12,664 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:17:12,664 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:17:12,664 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:17:12,664 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:17:12,665 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:17:12,665 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:17:12,665 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:17:12,665 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:17:12,665 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:17:12,666 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:17:12,666 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:17:12,666 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:17:12,666 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:17:12,666 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:17:12,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:17:12,667 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:17:12,667 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:17:12,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:17:12,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:17:12,668 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:17:12,668 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:17:12,668 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:17:12,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:17:12,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:17:12,668 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:17:12,669 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:17:12,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:17:12,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:17:12,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:17:12,731 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:17:12,732 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:17:12,732 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl [2018-10-02 12:17:12,733 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl' [2018-10-02 12:17:12,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:17:12,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:17:12,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:17:12,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:17:12,781 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:17:12,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:17:12,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:17:12,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:17:12,824 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:17:12,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/1) ... [2018-10-02 12:17:12,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:17:12,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:17:12,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:17:12,851 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:17:12,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (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 12:17:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:17:12,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:17:13,215 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:17:13,217 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:17:13 BoogieIcfgContainer [2018-10-02 12:17:13,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:17:13,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:17:13,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:17:13,224 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:17:13,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:12" (1/2) ... [2018-10-02 12:17:13,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147b336d and model type up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:17:13, skipping insertion in model container [2018-10-02 12:17:13,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:17:13" (2/2) ... [2018-10-02 12:17:13,228 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i_4.bpl [2018-10-02 12:17:13,237 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:17:13,245 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:17:13,295 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:17:13,296 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:17:13,297 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:17:13,297 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:17:13,297 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:17:13,297 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:17:13,297 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:17:13,298 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:17:13,298 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:17:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-02 12:17:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:17:13,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:13,321 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 12:17:13,322 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:13,329 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-10-02 12:17:13,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:13,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:13,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:13,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:13,623 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 12:17:13,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:17:13,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 12:17:13,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:17:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:17:13,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:13,658 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-02 12:17:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:13,883 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-02 12:17:13,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:17:13,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 12:17:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:13,898 INFO L225 Difference]: With dead ends: 16 [2018-10-02 12:17:13,898 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:17:13,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:17:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:17:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:17:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:17:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-02 12:17:13,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-02 12:17:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:13,931 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-02 12:17:13,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:17:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-02 12:17:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:17:13,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:13,932 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:13,933 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:13,933 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-10-02 12:17:13,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:13,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:13,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:13,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:13,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:17:13,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-02 12:17:14,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 12:17:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 12:17:14,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:14,001 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-02 12:17:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:14,444 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-02 12:17:14,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:17:14,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 12:17:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:14,445 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:17:14,445 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:17:14,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime [2018-10-02 12:17:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:17:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-02 12:17:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:17:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 12:17:14,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-02 12:17:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:14,451 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 12:17:14,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 12:17:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 12:17:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:17:14,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:14,452 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 12:17:14,453 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:14,453 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-10-02 12:17:14,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:14,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:14,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:14,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:14,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:14,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:14,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:14,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:14,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-02 12:17:14,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:17:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:17:14,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:14,742 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 8 states. [2018-10-02 12:17:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:15,140 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-02 12:17:15,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:17:15,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-10-02 12:17:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:15,142 INFO L225 Difference]: With dead ends: 20 [2018-10-02 12:17:15,142 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:17:15,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:17:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:17:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:17:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-02 12:17:15,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-02 12:17:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:15,148 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-02 12:17:15,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:17:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-02 12:17:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:17:15,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:15,149 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-02 12:17:15,149 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:15,149 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-10-02 12:17:15,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:15,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:15,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:15,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:15,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:15,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:15,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:15,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:15,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:15,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:15,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:15,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:15,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-02 12:17:15,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:17:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:17:15,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:15,758 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-02 12:17:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:16,070 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-02 12:17:16,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:17:16,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-02 12:17:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:16,072 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:17:16,072 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:17:16,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime [2018-10-02 12:17:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:17:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-02 12:17:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:17:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-02 12:17:16,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-02 12:17:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:16,079 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-02 12:17:16,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:17:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-02 12:17:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:17:16,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:16,080 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-02 12:17:16,080 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:16,080 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-10-02 12:17:16,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:16,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:16,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:16,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:16,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:16,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:16,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:16,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:16,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 12:17:16,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:16,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:16,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:16,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-10-02 12:17:16,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:17:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:17:16,307 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:16,308 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-10-02 12:17:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:16,628 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-02 12:17:16,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:17:16,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-02 12:17:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:16,629 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:17:16,629 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:17:16,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:17:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:17:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:17:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-02 12:17:16,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-02 12:17:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:16,635 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-02 12:17:16,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:17:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-02 12:17:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:17:16,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:16,636 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-02 12:17:16,636 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:16,636 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-10-02 12:17:16,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:16,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:16,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:16,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:16,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:16,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:16,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:16,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:16,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:16,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:16,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:16,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:16,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-02 12:17:16,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 12:17:16,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 12:17:16,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:16,876 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-02 12:17:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:17,065 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-02 12:17:17,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:17:17,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 12:17:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:17,067 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:17:17,068 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:17:17,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:17:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:17:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-02 12:17:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:17:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-02 12:17:17,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-02 12:17:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:17,075 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-02 12:17:17,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 12:17:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-02 12:17:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:17:17,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:17,076 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-02 12:17:17,076 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:17,076 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-10-02 12:17:17,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:17,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:17,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:17,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:17,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:17,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:17,306 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 12:17:17,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:17:17,366 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 12:17:17,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:17,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:17,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:17,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-02 12:17:17,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:17:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:17:17,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:17,484 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2018-10-02 12:17:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:17,784 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-02 12:17:17,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:17:17,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-10-02 12:17:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:17,785 INFO L225 Difference]: With dead ends: 32 [2018-10-02 12:17:17,785 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:17:17,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:17:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:17:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:17:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:17:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-02 12:17:17,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-02 12:17:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:17,790 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-02 12:17:17,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:17:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-02 12:17:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:17:17,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:17,791 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-02 12:17:17,792 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:17,792 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-10-02 12:17:17,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:17,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:17,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:17,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:17,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:17,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:17,908 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 12:17:17,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:17:17,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 12:17:17,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:17,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:18,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:18,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-02 12:17:18,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:17:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:17:18,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:18,058 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-02 12:17:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:18,441 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-02 12:17:18,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:17:18,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-02 12:17:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:18,443 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:17:18,443 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:17:18,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:17:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:17:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-02 12:17:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:17:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-02 12:17:18,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-02 12:17:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:18,450 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-02 12:17:18,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:17:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-02 12:17:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:17:18,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:18,451 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-02 12:17:18,452 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:18,452 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-10-02 12:17:18,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:18,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:18,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:18,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:18,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:18,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:18,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:18,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:18,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:18,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:18,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-02 12:17:18,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:17:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:17:18,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:18,840 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2018-10-02 12:17:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:19,377 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-02 12:17:19,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:17:19,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-10-02 12:17:19,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:19,378 INFO L225 Difference]: With dead ends: 38 [2018-10-02 12:17:19,379 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:17:19,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:17:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:17:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:17:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:17:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-02 12:17:19,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-02 12:17:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:19,385 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-02 12:17:19,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:17:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-02 12:17:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:17:19,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:19,386 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-02 12:17:19,386 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:19,387 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-10-02 12:17:19,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:19,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:19,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:19,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:19,514 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 12:17:19,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:19,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:19,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:19,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:19,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:19,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-02 12:17:19,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:17:19,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:17:19,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:19,784 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-02 12:17:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:20,072 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-02 12:17:20,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:17:20,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-02 12:17:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:20,073 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:17:20,073 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:17:20,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime [2018-10-02 12:17:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:17:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-02 12:17:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:17:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-02 12:17:20,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-02 12:17:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:20,080 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-02 12:17:20,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:17:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-02 12:17:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:17:20,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:20,081 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-02 12:17:20,081 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:20,081 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-10-02 12:17:20,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:20,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:20,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:20,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:20,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:20,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:20,290 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 12:17:20,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:20,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 12:17:20,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:20,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:20,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:20,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-02 12:17:20,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:17:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:17:20,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:20,588 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2018-10-02 12:17:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:21,180 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-02 12:17:21,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:17:21,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2018-10-02 12:17:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:21,180 INFO L225 Difference]: With dead ends: 44 [2018-10-02 12:17:21,181 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:17:21,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:17:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:17:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:17:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:17:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-02 12:17:21,187 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-02 12:17:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:21,187 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-02 12:17:21,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:17:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-02 12:17:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:17:21,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:21,188 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-02 12:17:21,189 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:21,189 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-10-02 12:17:21,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:21,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:21,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:21,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:21,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:21,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:21,597 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 12:17:21,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:21,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:21,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:21,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:21,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:21,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-02 12:17:21,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:17:21,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:17:21,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:21,868 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-02 12:17:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:22,212 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-02 12:17:22,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:17:22,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-02 12:17:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:22,213 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:17:22,213 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:17:22,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime [2018-10-02 12:17:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:17:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-02 12:17:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:17:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-02 12:17:22,221 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-02 12:17:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:22,221 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-02 12:17:22,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:17:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-02 12:17:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:17:22,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:22,222 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-02 12:17:22,222 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:22,223 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-10-02 12:17:22,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:22,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:22,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:22,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:22,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:22,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:22,416 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 12:17:22,425 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:17:22,448 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 12:17:22,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:22,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:22,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:22,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-02 12:17:22,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 12:17:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 12:17:22,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:22,605 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 23 states. [2018-10-02 12:17:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:23,275 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-02 12:17:23,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:17:23,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-10-02 12:17:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:23,275 INFO L225 Difference]: With dead ends: 50 [2018-10-02 12:17:23,276 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:17:23,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:17:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:17:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:17:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:17:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-02 12:17:23,283 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-02 12:17:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:23,283 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-02 12:17:23,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 12:17:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-02 12:17:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:17:23,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:23,284 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-02 12:17:23,284 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:23,285 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-10-02 12:17:23,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:23,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:23,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:23,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:23,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:23,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:23,410 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 12:17:23,417 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:17:23,445 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 12:17:23,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:23,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:23,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:23,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-02 12:17:23,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 12:17:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 12:17:23,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:23,539 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-02 12:17:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:23,968 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-02 12:17:23,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:17:23,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-02 12:17:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:23,970 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:17:23,970 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:17:23,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:17:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-02 12:17:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:17:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-02 12:17:23,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-02 12:17:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:23,977 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-02 12:17:23,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 12:17:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-02 12:17:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:17:23,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:23,978 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-02 12:17:23,979 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:23,979 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-10-02 12:17:23,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:23,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:23,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:23,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:23,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:24,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:24,245 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 12:17:24,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:24,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:24,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:24,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-02 12:17:24,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:17:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:17:24,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:24,805 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 26 states. [2018-10-02 12:17:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:25,525 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-02 12:17:25,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:17:25,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2018-10-02 12:17:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:25,526 INFO L225 Difference]: With dead ends: 56 [2018-10-02 12:17:25,527 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:17:25,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime [2018-10-02 12:17:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:17:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:17:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:17:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-02 12:17:25,534 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-02 12:17:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:25,535 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-02 12:17:25,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:17:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-02 12:17:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:17:25,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:25,536 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-02 12:17:25,536 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:25,536 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-10-02 12:17:25,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:25,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:25,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:25,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:25,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:25,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:25,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:25,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:25,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:25,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:25,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:25,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:25,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-02 12:17:25,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:17:25,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:17:25,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:25,840 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-02 12:17:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:26,323 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-02 12:17:26,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:17:26,323 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-02 12:17:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:26,324 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:17:26,324 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 12:17:26,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:17:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 12:17:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-02 12:17:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:17:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-02 12:17:26,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-02 12:17:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:26,333 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-02 12:17:26,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:17:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-02 12:17:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:17:26,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:26,334 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-02 12:17:26,334 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:26,334 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-10-02 12:17:26,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:26,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:26,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:26,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:26,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:26,748 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 12:17:26,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:26,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 12:17:26,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:26,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:26,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:26,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-02 12:17:26,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:17:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:17:26,947 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:26,948 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2018-10-02 12:17:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:27,883 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-02 12:17:27,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:17:27,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2018-10-02 12:17:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:27,883 INFO L225 Difference]: With dead ends: 62 [2018-10-02 12:17:27,884 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:17:27,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:17:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:17:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:17:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:17:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-02 12:17:27,891 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-02 12:17:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:27,891 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-02 12:17:27,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:17:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-02 12:17:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:17:27,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:27,892 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-02 12:17:27,892 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:27,893 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-10-02 12:17:27,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:27,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:27,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:27,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:27,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:28,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:28,055 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 12:17:28,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:28,108 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:28,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:28,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:28,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:28,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-02 12:17:28,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:17:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:17:28,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:28,258 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-02 12:17:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:28,678 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-02 12:17:28,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:17:28,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-02 12:17:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:28,679 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:17:28,679 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 12:17:28,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:17:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 12:17:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-02 12:17:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 12:17:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-02 12:17:28,688 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-02 12:17:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:28,688 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-02 12:17:28,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:17:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-02 12:17:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 12:17:28,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:28,689 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-02 12:17:28,689 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:28,689 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-10-02 12:17:28,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:28,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:28,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:28,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:28,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:28,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:28,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:28,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:17:28,994 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 12:17:28,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:28,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:29,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:29,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-02 12:17:29,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:17:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:17:29,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:29,199 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2018-10-02 12:17:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:30,187 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-02 12:17:30,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:17:30,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2018-10-02 12:17:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:30,188 INFO L225 Difference]: With dead ends: 68 [2018-10-02 12:17:30,188 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 12:17:30,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:17:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 12:17:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 12:17:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 12:17:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-02 12:17:30,197 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-02 12:17:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:30,198 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-02 12:17:30,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:17:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-02 12:17:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 12:17:30,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:30,199 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-02 12:17:30,199 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:30,199 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:30,199 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-10-02 12:17:30,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:30,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:30,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:30,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:30,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:30,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:30,383 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 12:17:30,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:17:30,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-02 12:17:30,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:30,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:30,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:30,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-02 12:17:30,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:17:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:17:30,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:30,549 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-02 12:17:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:31,009 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-02 12:17:31,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:17:31,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-02 12:17:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:31,011 INFO L225 Difference]: With dead ends: 53 [2018-10-02 12:17:31,011 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 12:17:31,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 12:17:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-02 12:17:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 12:17:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-02 12:17:31,019 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-02 12:17:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:31,020 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-02 12:17:31,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:17:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-02 12:17:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 12:17:31,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:31,023 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-02 12:17:31,023 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:31,024 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-10-02 12:17:31,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:31,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:31,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:31,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:31,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:31,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:31,799 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 12:17:31,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:31,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:32,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:32,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-10-02 12:17:32,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 12:17:32,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 12:17:32,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:32,120 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 35 states. [2018-10-02 12:17:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:33,236 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-02 12:17:33,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:17:33,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2018-10-02 12:17:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:33,237 INFO L225 Difference]: With dead ends: 74 [2018-10-02 12:17:33,237 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 12:17:33,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime [2018-10-02 12:17:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 12:17:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 12:17:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 12:17:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-02 12:17:33,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-02 12:17:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:33,244 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-02 12:17:33,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 12:17:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-02 12:17:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 12:17:33,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:33,245 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-02 12:17:33,245 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:33,246 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-10-02 12:17:33,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:33,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:33,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:33,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:33,532 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 12:17:33,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:33,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:33,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:33,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 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 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:33,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-02 12:17:33,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:17:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:17:33,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:33,912 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-02 12:17:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:34,395 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-02 12:17:34,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:17:34,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-02 12:17:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:34,399 INFO L225 Difference]: With dead ends: 57 [2018-10-02 12:17:34,399 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 12:17:34,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime [2018-10-02 12:17:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 12:17:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-02 12:17:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 12:17:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-02 12:17:34,408 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-02 12:17:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:34,409 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-02 12:17:34,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:17:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-02 12:17:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 12:17:34,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:34,410 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-02 12:17:34,410 INFO L423 AbstractCegarLoop]: === Iteration 23 === [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 -700907173, now seen corresponding path program 21 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 L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:34,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:35,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:35,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:35,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:35,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 12:17:35,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:35,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:35,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:35,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-02 12:17:35,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:17:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:17:35,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:35,627 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2018-10-02 12:17:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:37,172 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-02 12:17:37,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:17:37,172 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-10-02 12:17:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:37,173 INFO L225 Difference]: With dead ends: 80 [2018-10-02 12:17:37,173 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 12:17:37,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:17:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 12:17:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 12:17:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 12:17:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-02 12:17:37,181 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-02 12:17:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:37,181 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-02 12:17:37,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:17:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-02 12:17:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 12:17:37,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:37,182 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-02 12:17:37,183 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:37,183 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-10-02 12:17:37,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:37,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:37,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:37,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:37,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:37,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:37,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:37,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:37,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:37,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:37,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:37,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:37,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-02 12:17:37,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:17:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:17:37,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:37,742 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-02 12:17:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:38,462 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-02 12:17:38,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:17:38,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-02 12:17:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:38,463 INFO L225 Difference]: With dead ends: 61 [2018-10-02 12:17:38,464 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 12:17:38,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:17:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 12:17:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-02 12:17:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 12:17:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-02 12:17:38,472 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-02 12:17:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:38,472 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-02 12:17:38,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:17:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-02 12:17:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 12:17:38,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:38,473 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-02 12:17:38,473 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:38,474 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-10-02 12:17:38,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:38,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:38,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:38,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:38,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:38,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:38,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:38,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:17:38,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 12:17:38,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:38,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:39,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:39,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-02 12:17:39,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:17:39,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:17:39,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:39,211 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2018-10-02 12:17:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:40,701 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-02 12:17:40,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:17:40,701 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-10-02 12:17:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:40,702 INFO L225 Difference]: With dead ends: 86 [2018-10-02 12:17:40,702 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 12:17:40,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:17:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 12:17:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 12:17:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 12:17:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-02 12:17:40,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-02 12:17:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:40,709 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-02 12:17:40,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:17:40,709 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-02 12:17:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 12:17:40,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:40,710 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-02 12:17:40,710 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:40,710 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:40,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-10-02 12:17:40,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:40,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:40,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:40,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:40,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:40,993 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 12:17:41,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:17:41,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-02 12:17:41,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:41,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:41,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:41,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-02 12:17:41,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 12:17:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 12:17:41,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:41,185 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-02 12:17:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:41,943 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-02 12:17:41,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:17:41,943 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-02 12:17:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:41,944 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:17:41,945 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 12:17:41,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:17:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 12:17:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-02 12:17:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 12:17:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-02 12:17:41,955 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-02 12:17:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:41,955 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-02 12:17:41,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 12:17:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-02 12:17:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 12:17:41,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:41,956 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-02 12:17:41,956 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:41,956 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-10-02 12:17:41,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:41,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:41,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:41,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:41,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:43,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:43,157 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 12:17:43,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:43,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:43,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:43,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-02 12:17:43,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:17:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:17:43,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:43,498 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 44 states. [2018-10-02 12:17:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:45,260 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-02 12:17:45,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:17:45,260 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2018-10-02 12:17:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:45,261 INFO L225 Difference]: With dead ends: 92 [2018-10-02 12:17:45,261 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 12:17:45,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime [2018-10-02 12:17:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 12:17:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 12:17:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 12:17:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-02 12:17:45,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-02 12:17:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:45,268 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-02 12:17:45,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:17:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-02 12:17:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 12:17:45,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:45,269 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-02 12:17:45,269 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:45,269 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-10-02 12:17:45,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:45,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:45,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:45,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:45,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:46,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:46,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:46,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:46,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:46,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:46,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:47,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:47,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-02 12:17:47,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:17:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:17:47,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:47,162 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-02 12:17:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:47,800 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-02 12:17:47,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:17:47,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-02 12:17:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:47,801 INFO L225 Difference]: With dead ends: 69 [2018-10-02 12:17:47,801 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 12:17:47,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.9s impTime [2018-10-02 12:17:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 12:17:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-02 12:17:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 12:17:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-02 12:17:47,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-02 12:17:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:47,810 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-02 12:17:47,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:17:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-02 12:17:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 12:17:47,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:47,811 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-02 12:17:47,811 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:47,812 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-10-02 12:17:47,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:47,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:47,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:47,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:47,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:48,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:48,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:48,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:17:48,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 12:17:48,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:48,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:48,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:48,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-02 12:17:48,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:17:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:17:48,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:48,580 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2018-10-02 12:17:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:51,091 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-02 12:17:51,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:17:51,092 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2018-10-02 12:17:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:51,092 INFO L225 Difference]: With dead ends: 98 [2018-10-02 12:17:51,093 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 12:17:51,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime [2018-10-02 12:17:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 12:17:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 12:17:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 12:17:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-02 12:17:51,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-02 12:17:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:51,101 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-02 12:17:51,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:17:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-02 12:17:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 12:17:51,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:51,102 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-02 12:17:51,102 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:51,102 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-10-02 12:17:51,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:51,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:51,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:51,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:51,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:51,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:51,346 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 12:17:51,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:17:51,407 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:17:51,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:51,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:51,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:51,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-02 12:17:51,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 12:17:51,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 12:17:51,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:51,562 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-02 12:17:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:52,399 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-02 12:17:52,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:17:52,399 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-02 12:17:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:52,400 INFO L225 Difference]: With dead ends: 73 [2018-10-02 12:17:52,400 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 12:17:52,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:17:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 12:17:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-02 12:17:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 12:17:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-02 12:17:52,411 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-02 12:17:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:52,411 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-02 12:17:52,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 12:17:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-02 12:17:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 12:17:52,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:52,412 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-02 12:17:52,413 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:52,413 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-10-02 12:17:52,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:52,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:52,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:52,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:52,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:52,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:52,854 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 12:17:52,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:17:53,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 12:17:53,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:53,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:54,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:54,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-02 12:17:54,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:17:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:17:54,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:54,204 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 50 states. [2018-10-02 12:17:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:56,511 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-02 12:17:56,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:17:56,511 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2018-10-02 12:17:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:56,511 INFO L225 Difference]: With dead ends: 104 [2018-10-02 12:17:56,512 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 12:17:56,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime [2018-10-02 12:17:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 12:17:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 12:17:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 12:17:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-02 12:17:56,522 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-02 12:17:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:56,522 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-02 12:17:56,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:17:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-02 12:17:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 12:17:56,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:56,522 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-02 12:17:56,523 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:56,523 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-10-02 12:17:56,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:56,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:56,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:56,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:56,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:56,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:56,763 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 12:17:56,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:17:56,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-02 12:17:56,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:56,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:57,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:57,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-02 12:17:57,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:17:57,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:17:57,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:57,189 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-02 12:17:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:58,181 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-02 12:17:58,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:17:58,181 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-02 12:17:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:58,182 INFO L225 Difference]: With dead ends: 77 [2018-10-02 12:17:58,182 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 12:17:58,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime [2018-10-02 12:17:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 12:17:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-02 12:17:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 12:17:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-02 12:17:58,196 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-02 12:17:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:58,196 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-02 12:17:58,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:17:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-02 12:17:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 12:17:58,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:58,197 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-02 12:17:58,197 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:58,197 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-10-02 12:17:58,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:58,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:58,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:58,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:17:58,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:59,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:59,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:59,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:59,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:59,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:59,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-02 12:17:59,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 12:17:59,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 12:17:59,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:59,736 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-10-02 12:18:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:02,780 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-02 12:18:02,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:18:02,780 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2018-10-02 12:18:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:02,781 INFO L225 Difference]: With dead ends: 110 [2018-10-02 12:18:02,781 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 12:18:02,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime [2018-10-02 12:18:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 12:18:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 12:18:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 12:18:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-02 12:18:02,792 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-02 12:18:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:02,792 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-02 12:18:02,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 12:18:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-02 12:18:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 12:18:02,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:02,792 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-02 12:18:02,793 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:02,793 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-10-02 12:18:02,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:02,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:02,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:02,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:02,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:03,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:03,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:18:03,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:03,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:03,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:03,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:03,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:03,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-02 12:18:03,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 12:18:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 12:18:03,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:03,401 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-02 12:18:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:04,192 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-02 12:18:04,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:18:04,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-02 12:18:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:04,194 INFO L225 Difference]: With dead ends: 81 [2018-10-02 12:18:04,194 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 12:18:04,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:18:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 12:18:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-02 12:18:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 12:18:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-02 12:18:04,205 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-02 12:18:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:04,205 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-02 12:18:04,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 12:18:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-02 12:18:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 12:18:04,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:04,206 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-02 12:18:04,206 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:04,206 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-10-02 12:18:04,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:04,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:04,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:04,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:04,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:04,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:04,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 12:18:04,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:04,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:05,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:05,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-10-02 12:18:05,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:18:05,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:18:05,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:05,280 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 56 states. [2018-10-02 12:18:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:08,182 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-02 12:18:08,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:18:08,182 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2018-10-02 12:18:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:08,183 INFO L225 Difference]: With dead ends: 116 [2018-10-02 12:18:08,183 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 12:18:08,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:18:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 12:18:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 12:18:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 12:18:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-02 12:18:08,194 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-02 12:18:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:08,194 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-02 12:18:08,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:18:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-02 12:18:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 12:18:08,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:08,195 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-02 12:18:08,195 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:08,195 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-10-02 12:18:08,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:08,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:08,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:08,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:08,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:08,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:08,524 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:08,564 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:08,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:08,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:08,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:08,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-02 12:18:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:18:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:18:08,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:08,759 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-02 12:18:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:09,552 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-02 12:18:09,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:18:09,553 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-02 12:18:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:09,553 INFO L225 Difference]: With dead ends: 85 [2018-10-02 12:18:09,554 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 12:18:09,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime [2018-10-02 12:18:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 12:18:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-02 12:18:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 12:18:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-02 12:18:09,565 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-02 12:18:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:09,565 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-02 12:18:09,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:18:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-02 12:18:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 12:18:09,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:09,566 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-02 12:18:09,566 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:09,567 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-10-02 12:18:09,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:09,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:09,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:09,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:09,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:10,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:10,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:10,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:10,192 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 12:18:10,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:10,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:10,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:10,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-02 12:18:10,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:18:10,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:18:10,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:10,659 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2018-10-02 12:18:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:14,114 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-02 12:18:14,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:18:14,114 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2018-10-02 12:18:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:14,115 INFO L225 Difference]: With dead ends: 122 [2018-10-02 12:18:14,115 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 12:18:14,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime [2018-10-02 12:18:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 12:18:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 12:18:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 12:18:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-02 12:18:14,126 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-02 12:18:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:14,127 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-02 12:18:14,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:18:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-02 12:18:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 12:18:14,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:14,127 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-02 12:18:14,128 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:14,128 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-10-02 12:18:14,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:14,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:14,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:14,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:14,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:14,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:14,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:14,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:14,633 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 12:18:14,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:14,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:14,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:14,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-02 12:18:14,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 12:18:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 12:18:14,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:14,905 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-02 12:18:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:15,663 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-02 12:18:15,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:18:15,663 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-02 12:18:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:15,664 INFO L225 Difference]: With dead ends: 89 [2018-10-02 12:18:15,664 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 12:18:15,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime [2018-10-02 12:18:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 12:18:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-02 12:18:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 12:18:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-02 12:18:15,677 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-02 12:18:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:15,677 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-02 12:18:15,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 12:18:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-02 12:18:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 12:18:15,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:15,678 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-02 12:18:15,678 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:15,678 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-10-02 12:18:15,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:15,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:15,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:15,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:15,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:16,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:16,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:16,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:16,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:16,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:16,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2018-10-02 12:18:16,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 12:18:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 12:18:16,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:16,749 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 62 states. [2018-10-02 12:18:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:20,169 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-02 12:18:20,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:18:20,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 82 [2018-10-02 12:18:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:20,169 INFO L225 Difference]: With dead ends: 128 [2018-10-02 12:18:20,170 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 12:18:20,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:18:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 12:18:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 12:18:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 12:18:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-02 12:18:20,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-02 12:18:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:20,181 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-02 12:18:20,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 12:18:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-02 12:18:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 12:18:20,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:20,182 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-02 12:18:20,182 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:20,182 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-10-02 12:18:20,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:20,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:20,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:20,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:20,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:20,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:20,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:20,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:20,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:20,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:20,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:20,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:20,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-02 12:18:20,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:18:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:18:20,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:20,732 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-02 12:18:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:21,630 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-02 12:18:21,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:18:21,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-02 12:18:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:21,631 INFO L225 Difference]: With dead ends: 93 [2018-10-02 12:18:21,631 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 12:18:21,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime [2018-10-02 12:18:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 12:18:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-02 12:18:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 12:18:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-02 12:18:21,645 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-02 12:18:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:21,646 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-02 12:18:21,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:18:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-02 12:18:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 12:18:21,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:21,646 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-02 12:18:21,646 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:21,647 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-10-02 12:18:21,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:21,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:21,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:21,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:21,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:22,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:22,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:22,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:22,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 12:18:22,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:22,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:23,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:23,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-02 12:18:23,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 12:18:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 12:18:23,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:23,233 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 65 states. [2018-10-02 12:18:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:26,835 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-02 12:18:26,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:18:26,835 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2018-10-02 12:18:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:26,836 INFO L225 Difference]: With dead ends: 134 [2018-10-02 12:18:26,836 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 12:18:26,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime [2018-10-02 12:18:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 12:18:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 12:18:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 12:18:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-02 12:18:26,848 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-02 12:18:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:26,848 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-02 12:18:26,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 12:18:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-02 12:18:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 12:18:26,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:26,849 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-02 12:18:26,849 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:26,849 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-10-02 12:18:26,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:26,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:26,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:27,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:27,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:27,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:27,231 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:27,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:27,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:27,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:27,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-02 12:18:27,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 12:18:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 12:18:27,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:27,425 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-02 12:18:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:28,627 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-02 12:18:28,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:18:28,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-02 12:18:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:28,628 INFO L225 Difference]: With dead ends: 97 [2018-10-02 12:18:28,629 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 12:18:28,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime [2018-10-02 12:18:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 12:18:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-02 12:18:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 12:18:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-02 12:18:28,644 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-02 12:18:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:28,645 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-02 12:18:28,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 12:18:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-02 12:18:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 12:18:28,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:28,645 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-02 12:18:28,645 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:28,646 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:28,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-10-02 12:18:28,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:28,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:28,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:28,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:28,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:29,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:29,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:29,983 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:30,049 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 12:18:30,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:30,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:30,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:30,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-10-02 12:18:30,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 12:18:30,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 12:18:30,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:30,631 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 68 states. [2018-10-02 12:18:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:34,720 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-02 12:18:34,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 12:18:34,720 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 90 [2018-10-02 12:18:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:34,721 INFO L225 Difference]: With dead ends: 140 [2018-10-02 12:18:34,721 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 12:18:34,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime [2018-10-02 12:18:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 12:18:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 12:18:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 12:18:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-02 12:18:34,738 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-02 12:18:34,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:34,738 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-02 12:18:34,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 12:18:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-02 12:18:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 12:18:34,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:34,739 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-02 12:18:34,739 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:34,740 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-10-02 12:18:34,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:34,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:34,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:34,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:34,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:35,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:35,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:35,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:35,271 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-02 12:18:35,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:35,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:36,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:36,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-02 12:18:36,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:18:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:18:36,488 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:36,488 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-02 12:18:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:37,492 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-02 12:18:37,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 12:18:37,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-02 12:18:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:37,493 INFO L225 Difference]: With dead ends: 101 [2018-10-02 12:18:37,493 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 12:18:37,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.3s impTime [2018-10-02 12:18:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 12:18:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-02 12:18:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 12:18:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-02 12:18:37,508 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-02 12:18:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:37,508 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-02 12:18:37,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:18:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-02 12:18:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 12:18:37,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:37,509 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-02 12:18:37,509 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:37,509 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-10-02 12:18:37,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:37,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:37,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:37,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:37,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:38,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:38,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:38,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:38,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:39,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:39,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-02 12:18:39,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 12:18:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 12:18:39,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:39,245 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 71 states. [2018-10-02 12:18:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:43,741 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-02 12:18:43,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 12:18:43,741 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2018-10-02 12:18:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:43,742 INFO L225 Difference]: With dead ends: 146 [2018-10-02 12:18:43,742 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 12:18:43,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime [2018-10-02 12:18:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 12:18:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 12:18:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 12:18:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-02 12:18:43,756 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-02 12:18:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:43,756 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-02 12:18:43,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 12:18:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-02 12:18:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 12:18:43,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:43,757 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-02 12:18:43,757 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:43,757 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-10-02 12:18:43,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:43,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:43,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:43,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:43,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:44,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:44,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:44,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:44,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:44,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:44,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:44,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:44,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-02 12:18:44,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:18:44,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:18:44,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:44,319 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-02 12:18:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:45,481 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-02 12:18:45,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:18:45,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-02 12:18:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:45,483 INFO L225 Difference]: With dead ends: 105 [2018-10-02 12:18:45,483 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 12:18:45,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime [2018-10-02 12:18:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 12:18:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-02 12:18:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 12:18:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-02 12:18:45,498 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-02 12:18:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:45,499 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-02 12:18:45,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:18:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-02 12:18:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 12:18:45,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:45,500 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-02 12:18:45,500 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:45,500 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-10-02 12:18:45,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:45,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:45,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:45,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:47,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:47,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:47,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:47,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 12:18:47,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:47,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:48,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:48,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-02 12:18:48,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 12:18:48,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 12:18:48,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:48,172 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 74 states. [2018-10-02 12:18:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:52,954 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-02 12:18:52,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:18:52,955 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 98 [2018-10-02 12:18:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:52,956 INFO L225 Difference]: With dead ends: 152 [2018-10-02 12:18:52,956 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 12:18:52,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.3s impTime [2018-10-02 12:18:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 12:18:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 12:18:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 12:18:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-02 12:18:52,974 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-02 12:18:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:52,974 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-02 12:18:52,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 12:18:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-02 12:18:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 12:18:52,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:52,974 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-02 12:18:52,975 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:52,975 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:52,975 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-10-02 12:18:52,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:52,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:52,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:52,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:52,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:53,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:53,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:53,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:53,704 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:53,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:53,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:53,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:53,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-02 12:18:53,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:18:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:18:53,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:53,912 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-02 12:18:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:55,028 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-02 12:18:55,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 12:18:55,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-02 12:18:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:55,029 INFO L225 Difference]: With dead ends: 109 [2018-10-02 12:18:55,030 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 12:18:55,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime [2018-10-02 12:18:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 12:18:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-02 12:18:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 12:18:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-02 12:18:55,047 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-02 12:18:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:55,048 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-02 12:18:55,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:18:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-02 12:18:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 12:18:55,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:55,049 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-02 12:18:55,049 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:55,049 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-10-02 12:18:55,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:55,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:55,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:55,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:55,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:56,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:56,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:56,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:56,982 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 12:18:56,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:56,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:57,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:57,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-02 12:18:57,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 12:18:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 12:18:57,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:57,692 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 77 states. [2018-10-02 12:19:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:02,875 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-02 12:19:02,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 12:19:02,876 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 102 [2018-10-02 12:19:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:02,876 INFO L225 Difference]: With dead ends: 158 [2018-10-02 12:19:02,876 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 12:19:02,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.4s impTime [2018-10-02 12:19:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 12:19:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 12:19:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 12:19:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-02 12:19:02,899 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-02 12:19:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:02,900 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-02 12:19:02,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 12:19:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-02 12:19:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 12:19:02,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:02,901 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-02 12:19:02,901 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:02,901 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-10-02 12:19:02,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:02,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:02,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:02,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:02,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:03,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:03,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:03,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:03,761 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-02 12:19:03,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:03,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:04,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:04,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-02 12:19:04,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 12:19:04,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 12:19:04,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:04,292 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-02 12:19:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:05,526 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-02 12:19:05,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:19:05,527 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-02 12:19:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:05,528 INFO L225 Difference]: With dead ends: 113 [2018-10-02 12:19:05,529 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 12:19:05,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.7s impTime [2018-10-02 12:19:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 12:19:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-02 12:19:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 12:19:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-02 12:19:05,551 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-02 12:19:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:05,552 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-02 12:19:05,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 12:19:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-02 12:19:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 12:19:05,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:05,553 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-02 12:19:05,553 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:05,553 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-10-02 12:19:05,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:05,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:05,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:05,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:05,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:06,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:06,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:06,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:06,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:07,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:07,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-02 12:19:07,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 12:19:07,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 12:19:07,340 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:07,340 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 80 states. [2018-10-02 12:19:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:12,930 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-02 12:19:12,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:19:12,930 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 106 [2018-10-02 12:19:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:12,931 INFO L225 Difference]: With dead ends: 164 [2018-10-02 12:19:12,931 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 12:19:12,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime [2018-10-02 12:19:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 12:19:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 12:19:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 12:19:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-02 12:19:12,954 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-02 12:19:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:12,954 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-02 12:19:12,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 12:19:12,955 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-02 12:19:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 12:19:12,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:12,955 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-02 12:19:12,956 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:12,956 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-10-02 12:19:12,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:12,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:12,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:12,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:12,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:13,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:13,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:13,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:13,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:13,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:13,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:13,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:13,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-02 12:19:13,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:19:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:19:13,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:13,767 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-02 12:19:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:15,147 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-02 12:19:15,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:19:15,148 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-02 12:19:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:15,149 INFO L225 Difference]: With dead ends: 117 [2018-10-02 12:19:15,149 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 12:19:15,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime [2018-10-02 12:19:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 12:19:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-02 12:19:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 12:19:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-02 12:19:15,167 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-02 12:19:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:15,168 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-02 12:19:15,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:19:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-02 12:19:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 12:19:15,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:15,169 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-02 12:19:15,169 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:15,169 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-10-02 12:19:15,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:15,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:15,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:15,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:15,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:15,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:15,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:15,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:15,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 12:19:15,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:15,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:16,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:16,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-02 12:19:16,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 12:19:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 12:19:16,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:16,700 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 83 states. [2018-10-02 12:19:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:19,785 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-02 12:19:19,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:19:19,785 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 110 [2018-10-02 12:19:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:19,786 INFO L225 Difference]: With dead ends: 170 [2018-10-02 12:19:19,786 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 12:19:19,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime [2018-10-02 12:19:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 12:19:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 12:19:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 12:19:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-02 12:19:19,808 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-02 12:19:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:19,808 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-02 12:19:19,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 12:19:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-02 12:19:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 12:19:19,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:19,809 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-02 12:19:19,809 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:19,809 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-10-02 12:19:19,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:19,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:19,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:19,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:19,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:20,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:20,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:20,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:20,365 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:20,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:20,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:20,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:20,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-02 12:19:20,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 12:19:20,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 12:19:20,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:20,794 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-02 12:19:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:22,158 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-02 12:19:22,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:19:22,158 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-02 12:19:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:22,160 INFO L225 Difference]: With dead ends: 121 [2018-10-02 12:19:22,160 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 12:19:22,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime [2018-10-02 12:19:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 12:19:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-02 12:19:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 12:19:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-02 12:19:22,189 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-02 12:19:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:22,189 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-02 12:19:22,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 12:19:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-02 12:19:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 12:19:22,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:22,190 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-02 12:19:22,191 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:22,191 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-10-02 12:19:22,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:22,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:22,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:22,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:22,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:23,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:23,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:23,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:23,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 12:19:23,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:23,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:24,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:24,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2018-10-02 12:19:24,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 12:19:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 12:19:24,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:24,675 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 86 states. [2018-10-02 12:19:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:30,110 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-02 12:19:30,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:19:30,110 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 114 [2018-10-02 12:19:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:30,111 INFO L225 Difference]: With dead ends: 176 [2018-10-02 12:19:30,111 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 12:19:30,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime [2018-10-02 12:19:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 12:19:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 12:19:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 12:19:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-02 12:19:30,131 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-02 12:19:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:30,131 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-02 12:19:30,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 12:19:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-02 12:19:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 12:19:30,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:30,132 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-02 12:19:30,132 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:30,132 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-10-02 12:19:30,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:30,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:30,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:30,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:30,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:30,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:30,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:30,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:30,681 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-02 12:19:30,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:30,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:31,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:31,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-02 12:19:31,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:19:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:19:31,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:31,875 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-02 12:19:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:33,594 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-02 12:19:33,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 12:19:33,594 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-02 12:19:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:33,595 INFO L225 Difference]: With dead ends: 125 [2018-10-02 12:19:33,595 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 12:19:33,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.6s impTime [2018-10-02 12:19:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 12:19:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-02 12:19:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 12:19:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-02 12:19:33,617 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-02 12:19:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:33,617 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-02 12:19:33,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:19:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-02 12:19:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 12:19:33,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:33,618 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-02 12:19:33,618 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:33,618 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-10-02 12:19:33,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:33,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:33,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:33,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:33,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:34,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:34,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:34,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:35,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:35,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:35,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-10-02 12:19:35,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 12:19:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 12:19:35,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:35,936 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 89 states. [2018-10-02 12:19:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:42,695 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-02 12:19:42,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 12:19:42,696 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 118 [2018-10-02 12:19:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:42,696 INFO L225 Difference]: With dead ends: 182 [2018-10-02 12:19:42,696 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 12:19:42,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.4s impTime [2018-10-02 12:19:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 12:19:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 12:19:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 12:19:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-02 12:19:42,717 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-02 12:19:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:42,717 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-02 12:19:42,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 12:19:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-02 12:19:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 12:19:42,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:42,718 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-02 12:19:42,718 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:42,718 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-10-02 12:19:42,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:42,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:42,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:42,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:42,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:43,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:43,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:43,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:43,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:43,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:43,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:43,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:43,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-02 12:19:43,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 12:19:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 12:19:43,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:43,700 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-02 12:19:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:45,320 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-02 12:19:45,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 12:19:45,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-02 12:19:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:45,321 INFO L225 Difference]: With dead ends: 129 [2018-10-02 12:19:45,321 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 12:19:45,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime [2018-10-02 12:19:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 12:19:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-02 12:19:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 12:19:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-02 12:19:45,350 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-02 12:19:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:45,350 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-02 12:19:45,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 12:19:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-02 12:19:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 12:19:45,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:45,351 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-02 12:19:45,351 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:45,351 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-10-02 12:19:45,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:45,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:45,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:45,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:45,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:46,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:46,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:46,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:46,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 12:19:46,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:46,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:47,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:47,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-10-02 12:19:47,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 12:19:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 12:19:47,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:47,287 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 92 states. [2018-10-02 12:19:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:53,159 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-02 12:19:53,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 12:19:53,160 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 122 [2018-10-02 12:19:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:53,160 INFO L225 Difference]: With dead ends: 188 [2018-10-02 12:19:53,160 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 12:19:53,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime [2018-10-02 12:19:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 12:19:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 12:19:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 12:19:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-02 12:19:53,189 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-02 12:19:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:53,189 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-02 12:19:53,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 12:19:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-02 12:19:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 12:19:53,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:53,190 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-02 12:19:53,191 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:53,191 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:53,191 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-10-02 12:19:53,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:53,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:53,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:53,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:53,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:53,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:53,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:53,588 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:53,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:53,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:53,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:53,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:53,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-02 12:19:53,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:19:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:19:53,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:53,916 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-02 12:19:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:55,690 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-02 12:19:55,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 12:19:55,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-02 12:19:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:55,691 INFO L225 Difference]: With dead ends: 133 [2018-10-02 12:19:55,692 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 12:19:55,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime [2018-10-02 12:19:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 12:19:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-02 12:19:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 12:19:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-02 12:19:55,713 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-02 12:19:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:55,713 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-02 12:19:55,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:19:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-02 12:19:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 12:19:55,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:55,714 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-02 12:19:55,714 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:55,714 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:55,714 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-10-02 12:19:55,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:55,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:55,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:55,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:55,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:56,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:56,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:56,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:56,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 12:19:56,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:56,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:57,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:57,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-10-02 12:19:57,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 12:19:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 12:19:57,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:57,345 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 95 states. [2018-10-02 12:20:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:01,019 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-02 12:20:01,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 12:20:01,019 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 126 [2018-10-02 12:20:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:01,020 INFO L225 Difference]: With dead ends: 194 [2018-10-02 12:20:01,020 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 12:20:01,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime [2018-10-02 12:20:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 12:20:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 12:20:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 12:20:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-02 12:20:01,045 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-02 12:20:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:01,045 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-02 12:20:01,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 12:20:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-02 12:20:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 12:20:01,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:01,046 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-02 12:20:01,046 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:01,046 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-10-02 12:20:01,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:01,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:01,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:01,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:01,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:01,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:01,703 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:20:01,808 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-02 12:20:01,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:01,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:02,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:02,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-02 12:20:02,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 12:20:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 12:20:02,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:02,093 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-02 12:20:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:03,475 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-02 12:20:03,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 12:20:03,476 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-02 12:20:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:03,477 INFO L225 Difference]: With dead ends: 137 [2018-10-02 12:20:03,477 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 12:20:03,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime [2018-10-02 12:20:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 12:20:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-02 12:20:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 12:20:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-02 12:20:03,501 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-02 12:20:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:03,501 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-02 12:20:03,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 12:20:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-02 12:20:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 12:20:03,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:03,502 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-02 12:20:03,502 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:03,502 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-10-02 12:20:03,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:03,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:03,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:03,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:03,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:04,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:04,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:04,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:04,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:05,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:05,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2018-10-02 12:20:05,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 12:20:05,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 12:20:05,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:05,798 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 98 states. [2018-10-02 12:20:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:13,836 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-02 12:20:13,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 12:20:13,836 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 130 [2018-10-02 12:20:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:13,837 INFO L225 Difference]: With dead ends: 200 [2018-10-02 12:20:13,837 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 12:20:13,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime [2018-10-02 12:20:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 12:20:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 12:20:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 12:20:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-02 12:20:13,861 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-02 12:20:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:13,861 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-02 12:20:13,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 12:20:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-02 12:20:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 12:20:13,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:13,862 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-02 12:20:13,862 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:13,862 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-10-02 12:20:13,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:13,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:13,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:13,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:13,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:14,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:14,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:14,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:20:14,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:20:14,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:14,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:14,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:14,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-02 12:20:14,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:20:14,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:20:14,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:14,707 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-02 12:20:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:16,509 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-02 12:20:16,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 12:20:16,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-02 12:20:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:16,510 INFO L225 Difference]: With dead ends: 141 [2018-10-02 12:20:16,510 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 12:20:16,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime [2018-10-02 12:20:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 12:20:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-02 12:20:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 12:20:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-02 12:20:16,537 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-02 12:20:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:16,537 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-02 12:20:16,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:20:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-02 12:20:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 12:20:16,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:16,538 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-02 12:20:16,538 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:16,538 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-10-02 12:20:16,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:16,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:16,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:16,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:16,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:18,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:18,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:18,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:20:18,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 12:20:18,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:18,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:19,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:19,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-10-02 12:20:19,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-02 12:20:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-02 12:20:19,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:19,152 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 101 states. [2018-10-02 12:20:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:28,208 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-02 12:20:28,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 12:20:28,208 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 134 [2018-10-02 12:20:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:28,209 INFO L225 Difference]: With dead ends: 206 [2018-10-02 12:20:28,209 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 12:20:28,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime [2018-10-02 12:20:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 12:20:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 12:20:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 12:20:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-02 12:20:28,235 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-02 12:20:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:28,235 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-02 12:20:28,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-02 12:20:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-02 12:20:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 12:20:28,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:28,236 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-02 12:20:28,237 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:28,237 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-10-02 12:20:28,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:28,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:28,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:28,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:28,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:28,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:28,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:28,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:20:28,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:20:28,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:28,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:29,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:29,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-02 12:20:29,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 12:20:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 12:20:29,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:29,228 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-02 12:20:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:31,070 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-02 12:20:31,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 12:20:31,071 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-02 12:20:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:31,072 INFO L225 Difference]: With dead ends: 145 [2018-10-02 12:20:31,072 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 12:20:31,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime [2018-10-02 12:20:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 12:20:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-02 12:20:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 12:20:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-02 12:20:31,100 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-02 12:20:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:31,100 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-02 12:20:31,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 12:20:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-02 12:20:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 12:20:31,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:31,101 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-02 12:20:31,101 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:31,102 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-10-02 12:20:31,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:31,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:31,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:31,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:31,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:32,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:32,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:32,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:20:32,821 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 12:20:32,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:32,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:33,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:33,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-10-02 12:20:33,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 12:20:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 12:20:33,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:33,888 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 104 states. [2018-10-02 12:20:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:43,025 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-02 12:20:43,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 12:20:43,025 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 138 [2018-10-02 12:20:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:43,025 INFO L225 Difference]: With dead ends: 212 [2018-10-02 12:20:43,026 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 12:20:43,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime [2018-10-02 12:20:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 12:20:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 12:20:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 12:20:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-02 12:20:43,053 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-02 12:20:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:43,053 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-02 12:20:43,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 12:20:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-02 12:20:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 12:20:43,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:43,053 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-02 12:20:43,054 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:43,054 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-10-02 12:20:43,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:43,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:43,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:43,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:43,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:43,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:43,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:43,402 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:20:43,529 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-02 12:20:43,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:43,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:43,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:43,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-02 12:20:43,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:20:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:20:43,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:43,777 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-02 12:20:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:45,436 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-02 12:20:45,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 12:20:45,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-02 12:20:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:45,438 INFO L225 Difference]: With dead ends: 149 [2018-10-02 12:20:45,438 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 12:20:45,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime [2018-10-02 12:20:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 12:20:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-02 12:20:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 12:20:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-02 12:20:45,467 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-02 12:20:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:45,468 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-02 12:20:45,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:20:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-02 12:20:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 12:20:45,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:45,468 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-02 12:20:45,468 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:45,469 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-10-02 12:20:45,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:45,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:45,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:45,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:45,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:47,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:47,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:47,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:47,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:48,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:48,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2018-10-02 12:20:48,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-02 12:20:48,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-02 12:20:48,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:48,420 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 107 states. [2018-10-02 12:20:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:58,657 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-02 12:20:58,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 12:20:58,657 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 142 [2018-10-02 12:20:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:58,658 INFO L225 Difference]: With dead ends: 218 [2018-10-02 12:20:58,658 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 12:20:58,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.3s impTime [2018-10-02 12:20:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 12:20:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 12:20:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 12:20:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-02 12:20:58,688 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-02 12:20:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:58,688 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-02 12:20:58,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-02 12:20:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-02 12:20:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 12:20:58,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:58,689 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-02 12:20:58,689 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:58,689 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-10-02 12:20:58,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:58,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:58,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:58,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:58,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:59,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:59,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:59,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:20:59,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:20:59,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:59,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:59,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:59,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-02 12:20:59,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:20:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:20:59,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:59,558 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-02 12:21:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:01,244 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-02 12:21:01,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 12:21:01,244 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-02 12:21:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:01,245 INFO L225 Difference]: With dead ends: 153 [2018-10-02 12:21:01,245 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 12:21:01,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime [2018-10-02 12:21:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 12:21:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-02 12:21:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 12:21:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-02 12:21:01,281 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-02 12:21:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:01,282 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-02 12:21:01,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:21:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-02 12:21:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 12:21:01,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:01,283 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-02 12:21:01,283 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:01,283 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-10-02 12:21:01,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:01,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:01,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:01,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:01,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:03,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:03,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:03,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:03,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 12:21:03,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:03,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:04,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:04,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 109 [2018-10-02 12:21:04,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 12:21:04,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 12:21:04,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:04,502 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 110 states. Received shutdown request... [2018-10-02 12:21:11,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 12:21:11,470 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:21:11,476 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:21:11,477 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:21:11 BoogieIcfgContainer [2018-10-02 12:21:11,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:21:11,478 INFO L168 Benchmark]: Toolchain (without parser) took 238700.76 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -95.4 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 132.9 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. [2018-10-02 12:21:11,479 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:21:11,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.28 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 12:21:11,480 INFO L168 Benchmark]: Boogie Preprocessor took 25.86 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 12:21:11,480 INFO L168 Benchmark]: RCFGBuilder took 367.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:21:11,481 INFO L168 Benchmark]: TraceAbstraction took 238258.60 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -95.4 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 111.7 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2018-10-02 12:21:11,484 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.28 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 25.86 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 367.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238258.60 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -95.4 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 111.7 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (147states) and FLOYD_HOARE automaton (currently 61 states, 110 states before enhancement), while ReachableStatesComputation was computing reachable states (163 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 238.1s OverallTime, 71 OverallIterations, 36 TraceHistogramMax, 158.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 949 SDtfs, 722 SDslu, 4313 SDs, 0 SdLazy, 36141 SolverSat, 2921 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9363 GetRequests, 5280 SyntacticMatches, 0 SemanticMatches, 4083 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=70, 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: 0.9s AutomataMinimizationTime, 70 MinimizatonAttempts, 140 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 70.1s InterpolantComputationTime, 10778 NumberOfCodeBlocks, 10778 NumberOfCodeBlocksAsserted, 792 NumberOfCheckSat, 10638 ConstructedInterpolants, 0 QuantifiedInterpolants, 3867464 SizeOfPredicates, 207 NumberOfNonLiveVariables, 21184 ConjunctsInSsa, 2862 ConjunctsInUnsatCore, 140 InterpolantComputations, 2 PerfectInterpolantSequences, 62158/121798 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/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-21-11-495.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-21-11-495.csv Completed graceful shutdown