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-b2fde6a [2018-09-28 10:37:57,058 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:37:57,063 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:37:57,082 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:37:57,083 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:37:57,085 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:37:57,086 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:37:57,088 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:37:57,090 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:37:57,093 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:37:57,095 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:37:57,095 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:37:57,096 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:37:57,097 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:37:57,098 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:37:57,106 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:37:57,107 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:37:57,111 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:37:57,116 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:37:57,120 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:37:57,122 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:37:57,123 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:37:57,125 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:37:57,133 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:37:57,148 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:37:57,148 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:37:57,149 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:37:57,149 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:37:57,149 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:37:57,150 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:37:57,150 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:37:57,150 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:37:57,150 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:37:57,150 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:37:57,151 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:37:57,151 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:37:57,151 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:37:57,151 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:37:57,151 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:37:57,152 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:37:57,152 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:37:57,152 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:37:57,152 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:37:57,152 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:37:57,153 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:37:57,153 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:37:57,153 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:37:57,153 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:37:57,153 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:37:57,154 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:37:57,154 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:37:57,154 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:37:57,154 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:37:57,155 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:37:57,155 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:37:57,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:37:57,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:37:57,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:37:57,221 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:37:57,222 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:37:57,223 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl [2018-09-28 10:37:57,223 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl' [2018-09-28 10:37:57,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:37:57,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:37:57,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:37:57,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:37:57,290 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:37:57,311 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 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,324 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 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:37:57,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:37:57,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:37:57,332 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:37:57,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... [2018-09-28 10:37:57,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:37:57,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:37:57,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:37:57,357 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:37:57,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:37:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:37:57,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:37:57,721 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:37:57,722 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:37:57 BoogieIcfgContainer [2018-09-28 10:37:57,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:37:57,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:37:57,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:37:57,726 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:37:57,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:57" (1/2) ... [2018-09-28 10:37:57,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a9c57e and model type up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:37:57, skipping insertion in model container [2018-09-28 10:37:57,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:37:57" (2/2) ... [2018-09-28 10:37:57,729 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i_4.bpl [2018-09-28 10:37:57,739 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:37:57,747 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:37:57,800 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:37:57,801 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:37:57,801 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:37:57,801 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:37:57,803 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:37:57,804 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:37:57,804 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:37:57,804 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:37:57,804 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:37:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-28 10:37:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:37:57,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:57,837 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-28 10:37:57,840 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:57,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-28 10:37:57,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:57,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:57,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:57,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:57,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:58,094 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:37:58,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-28 10:37:58,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:37:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:37:58,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:58,123 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-28 10:37:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:58,337 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-28 10:37:58,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:37:58,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-28 10:37:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:58,349 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:37:58,349 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:37:58,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:37:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:37:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:37:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-28 10:37:58,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-28 10:37:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:58,389 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-28 10:37:58,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:37:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-28 10:37:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:37:58,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:58,390 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-28 10:37:58,390 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:58,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-28 10:37:58,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:58,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:58,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:58,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:58,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:58,460 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:37:58,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 10:37:58,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:37:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:37:58,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:58,464 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-28 10:37:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:58,943 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-28 10:37:58,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:37:58,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:37:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:58,947 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:37:58,947 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:37:58,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:37:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-28 10:37:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:37:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-28 10:37:58,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-28 10:37:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:58,954 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-28 10:37:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:37:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-28 10:37:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:37:58,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:58,957 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 10:37:58,957 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:58,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-28 10:37:58,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:58,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:58,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:58,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:58,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:59,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:59,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:59,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:59,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:59,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:59,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-28 10:37:59,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:37:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:37:59,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:59,368 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 8 states. [2018-09-28 10:37:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:59,831 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-28 10:37:59,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:37:59,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-28 10:37:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:59,833 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:37:59,833 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:37:59,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:37:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:37:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:37:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-28 10:37:59,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-28 10:37:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:59,842 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-28 10:37:59,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:37:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-28 10:37:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:37:59,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:59,843 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-28 10:37:59,844 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:59,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-28 10:37:59,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:59,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:59,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:59,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:59,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:00,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:00,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:00,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:00,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:00,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:00,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:00,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:00,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-28 10:38:00,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:38:00,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:38:00,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:00,439 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-28 10:38:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:00,835 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-28 10:38:00,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:38:00,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-28 10:38:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:00,837 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:38:00,838 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:38:00,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:38:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-28 10:38:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:38:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-28 10:38:00,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-28 10:38:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:00,844 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-28 10:38:00,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:38:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-28 10:38:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:38:00,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:00,845 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-28 10:38:00,846 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:00,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:00,846 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-28 10:38:00,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:00,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:00,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:00,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:00,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:00,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:00,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:00,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:01,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:38:01,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:01,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:01,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:01,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-28 10:38:01,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:38:01,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:38:01,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:01,104 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-09-28 10:38:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:01,460 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-28 10:38:01,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:38:01,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-28 10:38:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:01,462 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:38:01,463 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:38:01,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:38:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:38:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:38:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-28 10:38:01,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-28 10:38:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:01,468 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-28 10:38:01,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:38:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-28 10:38:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:38:01,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:01,469 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-28 10:38:01,469 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:01,469 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:01,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-28 10:38:01,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:01,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:01,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:01,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:01,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:01,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:01,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:01,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:01,619 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:01,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:01,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:01,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:01,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-28 10:38:01,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:38:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:38:01,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:01,817 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-28 10:38:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:02,026 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-28 10:38:02,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:38:02,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-28 10:38:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:02,035 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:38:02,035 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:38:02,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:38:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-28 10:38:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:38:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-28 10:38:02,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-28 10:38:02,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:02,041 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-28 10:38:02,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:38:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-28 10:38:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:38:02,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:02,043 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-28 10:38:02,043 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:02,043 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-28 10:38:02,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:02,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:02,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:02,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:02,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:02,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:02,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:02,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:02,217 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:38:02,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:02,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:02,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:02,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-28 10:38:02,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:38:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:38:02,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:02,361 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2018-09-28 10:38:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:02,696 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-28 10:38:02,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:38:02,696 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-09-28 10:38:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:02,697 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:38:02,697 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:38:02,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:38:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:38:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:38:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-28 10:38:02,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-28 10:38:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:02,702 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-28 10:38:02,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:38:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-28 10:38:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:38:02,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:02,703 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-28 10:38:02,704 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:02,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-28 10:38:02,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:02,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:02,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:02,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:02,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:02,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:02,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:02,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:02,844 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-28 10:38:02,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:02,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:02,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:02,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-28 10:38:02,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:38:02,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:38:02,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:02,959 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-28 10:38:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:03,426 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-28 10:38:03,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:38:03,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-28 10:38:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:03,428 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:38:03,428 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:38:03,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:38:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-28 10:38:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:38:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-28 10:38:03,435 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-28 10:38:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:03,435 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-28 10:38:03,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:38:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-28 10:38:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:38:03,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:03,436 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-28 10:38:03,436 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:03,437 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-28 10:38:03,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:03,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:03,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:03,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:03,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:03,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:03,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:03,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:03,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:03,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:03,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-28 10:38:03,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:38:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:38:03,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:03,842 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2018-09-28 10:38:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:04,476 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-28 10:38:04,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:38:04,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-09-28 10:38:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:04,477 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:38:04,477 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:38:04,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:38:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:38:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:38:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-28 10:38:04,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-28 10:38:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:04,483 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-28 10:38:04,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:38:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-28 10:38:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:38:04,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:04,484 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-28 10:38:04,485 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:04,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-28 10:38:04,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:04,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:04,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:04,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:04,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:04,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:04,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:04,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:04,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:04,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:04,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:04,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:04,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-28 10:38:04,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:38:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:38:04,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:04,932 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-28 10:38:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:05,250 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-28 10:38:05,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:38:05,251 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-28 10:38:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:05,252 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:38:05,252 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:38:05,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:38:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-28 10:38:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:38:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-28 10:38:05,257 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-28 10:38:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:05,257 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-28 10:38:05,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:38:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-28 10:38:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:38:05,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:05,258 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-28 10:38:05,258 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:05,259 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-28 10:38:05,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:05,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:05,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:05,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:05,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:05,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:05,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:05,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:05,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:38:05,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:05,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:05,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:05,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-28 10:38:05,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:38:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:38:05,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:05,740 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2018-09-28 10:38:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:06,290 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-28 10:38:06,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:38:06,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2018-09-28 10:38:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:06,291 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:38:06,292 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:38:06,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:38:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:38:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:38:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-28 10:38:06,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-28 10:38:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:06,298 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-28 10:38:06,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:38:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-28 10:38:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:38:06,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:06,299 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-28 10:38:06,299 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:06,300 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-28 10:38:06,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:06,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:06,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:06,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:06,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:06,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:06,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:06,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:06,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:06,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:06,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:06,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:06,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-28 10:38:06,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:38:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:38:06,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:06,855 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-28 10:38:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:07,213 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-28 10:38:07,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:38:07,214 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-28 10:38:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:07,215 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:38:07,215 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:38:07,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:38:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-28 10:38:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:38:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-28 10:38:07,224 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-28 10:38:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:07,225 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-28 10:38:07,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:38:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-28 10:38:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:38:07,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:07,226 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-28 10:38:07,226 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:07,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-28 10:38:07,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:07,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:07,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:07,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:07,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:07,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:07,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:07,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:07,414 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:38:07,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:07,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:07,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:07,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-09-28 10:38:07,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:38:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:38:07,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:07,589 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 23 states. [2018-09-28 10:38:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:08,347 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-28 10:38:08,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:38:08,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-09-28 10:38:08,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:08,348 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:38:08,348 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:38:08,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:38:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:38:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:38:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-28 10:38:08,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-28 10:38:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:08,359 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-28 10:38:08,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:38:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-28 10:38:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:38:08,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:08,360 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-28 10:38:08,360 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:08,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-28 10:38:08,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:08,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:08,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:08,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:08,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:08,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:08,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:08,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:08,537 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:38:08,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:08,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:08,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:08,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-28 10:38:08,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:38:08,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:38:08,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:08,661 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-28 10:38:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:09,028 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-28 10:38:09,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:38:09,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-28 10:38:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:09,029 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:38:09,030 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:38:09,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:38:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-28 10:38:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:38:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-28 10:38:09,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-28 10:38:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:09,037 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-28 10:38:09,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:38:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-28 10:38:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:38:09,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:09,038 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-28 10:38:09,038 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:09,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-28 10:38:09,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:09,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:09,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:09,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:09,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:09,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:09,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:09,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:09,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:09,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:09,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-28 10:38:09,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:38:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:38:09,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:09,928 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 26 states. [2018-09-28 10:38:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:10,752 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-28 10:38:10,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:38:10,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2018-09-28 10:38:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:10,753 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:38:10,753 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:38:10,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:10,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:38:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:38:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:38:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-28 10:38:10,760 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-28 10:38:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:10,760 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-28 10:38:10,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:38:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-28 10:38:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:38:10,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:10,761 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-28 10:38:10,761 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:10,762 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-28 10:38:10,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:10,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:10,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:10,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:10,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:11,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:11,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:11,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:11,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:11,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:11,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:11,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:11,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-28 10:38:11,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:38:11,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:38:11,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:11,172 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-28 10:38:11,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:11,617 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-28 10:38:11,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:38:11,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-28 10:38:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:11,618 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:38:11,619 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:38:11,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:38:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-28 10:38:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:38:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-28 10:38:11,627 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-28 10:38:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:11,628 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-28 10:38:11,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:38:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-28 10:38:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:38:11,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:11,629 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-28 10:38:11,629 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:11,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-28 10:38:11,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:11,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:11,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:11,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:11,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:11,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:11,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:38:11,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:11,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:12,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:12,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-28 10:38:12,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:38:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:38:12,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:12,064 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2018-09-28 10:38:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:13,235 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-28 10:38:13,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:38:13,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2018-09-28 10:38:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:13,236 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:38:13,236 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:38:13,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:38:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:38:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:38:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-28 10:38:13,243 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-28 10:38:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:13,244 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-28 10:38:13,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:38:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-28 10:38:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:38:13,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:13,245 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-28 10:38:13,245 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:13,245 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-28 10:38:13,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:13,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:13,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:13,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:13,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:13,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:13,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:13,416 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:13,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:13,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:13,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:13,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:13,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-28 10:38:13,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:38:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:38:13,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:13,572 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-28 10:38:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:14,125 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-28 10:38:14,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:38:14,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-28 10:38:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:14,133 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:38:14,133 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:38:14,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:38:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-28 10:38:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:38:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-28 10:38:14,144 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-28 10:38:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:14,144 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-28 10:38:14,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:38:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-28 10:38:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:38:14,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:14,145 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-28 10:38:14,146 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:14,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-28 10:38:14,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:14,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:14,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:14,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:14,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:14,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:14,495 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:14,523 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:38:14,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:14,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:14,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:14,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-09-28 10:38:14,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:38:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:38:14,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:14,748 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2018-09-28 10:38:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:16,137 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-28 10:38:16,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:38:16,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2018-09-28 10:38:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:16,138 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:38:16,138 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:38:16,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:38:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:38:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:38:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-28 10:38:16,146 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-28 10:38:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:16,146 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-28 10:38:16,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:38:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-28 10:38:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:38:16,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:16,147 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-28 10:38:16,147 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:16,147 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-28 10:38:16,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:16,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:16,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:16,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:16,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:16,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:16,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:16,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:16,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-28 10:38:16,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:16,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:16,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:16,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-28 10:38:16,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:38:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:38:16,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:16,475 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-28 10:38:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:16,955 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-28 10:38:16,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:38:16,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-28 10:38:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:16,957 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:38:16,957 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:38:16,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:38:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-28 10:38:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:38:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-28 10:38:16,966 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-28 10:38:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:16,966 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-28 10:38:16,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:38:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-28 10:38:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:38:16,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:16,967 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-28 10:38:16,967 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:16,967 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-28 10:38:16,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:16,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:16,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:16,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:17,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:17,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:17,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:17,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:17,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:17,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-09-28 10:38:17,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:38:17,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:38:17,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:17,941 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 35 states. [2018-09-28 10:38:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:19,573 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-28 10:38:19,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:38:19,573 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2018-09-28 10:38:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:19,573 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:38:19,574 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:38:19,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:38:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:38:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:38:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-28 10:38:19,581 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-28 10:38:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:19,581 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-28 10:38:19,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:38:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-28 10:38:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:38:19,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:19,582 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-28 10:38:19,583 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:19,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-28 10:38:19,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:19,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:19,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:19,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:19,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:19,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:19,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:19,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:19,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:19,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:19,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:20,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:20,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-28 10:38:20,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:38:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:38:20,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:20,116 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-28 10:38:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:20,678 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-28 10:38:20,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:38:20,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-28 10:38:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:20,681 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:38:20,681 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:38:20,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:38:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-28 10:38:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:38:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-28 10:38:20,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-28 10:38:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:20,691 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-28 10:38:20,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:38:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-28 10:38:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:38:20,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:20,692 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-28 10:38:20,692 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:20,692 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:20,692 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-28 10:38:20,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:20,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:20,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:20,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:20,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:22,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:22,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:22,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:22,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:38:22,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:22,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:22,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:22,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-28 10:38:22,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:38:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:38:22,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:22,957 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2018-09-28 10:38:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:25,089 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-28 10:38:25,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:38:25,090 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-09-28 10:38:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:25,090 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:38:25,090 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:38:25,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:38:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:38:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:38:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-28 10:38:25,097 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-28 10:38:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:25,097 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-28 10:38:25,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:38:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-28 10:38:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:38:25,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:25,098 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-28 10:38:25,098 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:25,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:25,098 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-28 10:38:25,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:25,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:25,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:25,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:25,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:25,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:25,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:25,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:25,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:25,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:25,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:26,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:26,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-28 10:38:26,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:38:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:38:26,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:26,078 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-28 10:38:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:26,747 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-28 10:38:26,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:38:26,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-28 10:38:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:26,748 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:38:26,748 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:38:26,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:38:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-28 10:38:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:38:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-28 10:38:26,755 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-28 10:38:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:26,755 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-28 10:38:26,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:38:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-28 10:38:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:38:26,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:26,756 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-28 10:38:26,757 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:26,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-28 10:38:26,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:26,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:26,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:26,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:26,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:26,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:26,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:27,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:27,038 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:38:27,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:27,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:27,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:27,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-28 10:38:27,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:38:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:38:27,490 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:27,490 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2018-09-28 10:38:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:29,174 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-28 10:38:29,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:38:29,174 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-09-28 10:38:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:29,175 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:38:29,175 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:38:29,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:38:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:38:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:38:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-28 10:38:29,181 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-28 10:38:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:29,181 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-28 10:38:29,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:38:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-28 10:38:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:38:29,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:29,182 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-28 10:38:29,182 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:29,182 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-28 10:38:29,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:29,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:29,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:29,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:29,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:29,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:29,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:29,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:29,577 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-28 10:38:29,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:29,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:29,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:29,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-28 10:38:29,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:38:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:38:29,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:29,710 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-28 10:38:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:30,706 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-28 10:38:30,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:38:30,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-28 10:38:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:30,707 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:38:30,707 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:38:30,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:38:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-28 10:38:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:38:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-28 10:38:30,715 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-28 10:38:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:30,716 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-28 10:38:30,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:38:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-28 10:38:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:38:30,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:30,717 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-28 10:38:30,717 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:30,717 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-28 10:38:30,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:30,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:30,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:30,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:30,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:31,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:31,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:31,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:31,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:31,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:31,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-09-28 10:38:31,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:38:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:38:31,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:31,513 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 44 states. [2018-09-28 10:38:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:33,700 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-28 10:38:33,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:38:33,701 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2018-09-28 10:38:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:33,701 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:38:33,701 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:38:33,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:38:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:38:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:38:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-28 10:38:33,708 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-28 10:38:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:33,709 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-28 10:38:33,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:38:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-28 10:38:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:38:33,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:33,709 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-28 10:38:33,709 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:33,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-28 10:38:33,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:33,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:33,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:33,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:33,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:34,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:34,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:34,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:34,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:34,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:34,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:34,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:34,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-28 10:38:34,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:38:34,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:38:34,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:34,608 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-28 10:38:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:35,247 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-28 10:38:35,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:38:35,248 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-28 10:38:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:35,248 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:38:35,249 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:38:35,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:38:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-28 10:38:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:38:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-28 10:38:35,257 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-28 10:38:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:35,257 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-28 10:38:35,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:38:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-28 10:38:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:38:35,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:35,258 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-28 10:38:35,258 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:35,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-28 10:38:35,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:35,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:35,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:35,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:35,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:35,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:35,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:35,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:35,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:38:35,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:35,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:36,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:36,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-28 10:38:36,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:38:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:38:36,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:36,055 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2018-09-28 10:38:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:37,977 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-28 10:38:37,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:38:37,977 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2018-09-28 10:38:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:37,978 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:38:37,978 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:38:37,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:38:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:38:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:38:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-28 10:38:37,987 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-28 10:38:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:37,987 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-28 10:38:37,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:38:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-28 10:38:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:38:37,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:37,988 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-28 10:38:37,988 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:37,988 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-28 10:38:37,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:37,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:37,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:37,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:37,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:38,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:38,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:38,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:38,243 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:38,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:38,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:38,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:38,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-28 10:38:38,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:38:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:38:38,384 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:38,384 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-28 10:38:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:39,081 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-28 10:38:39,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:38:39,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-28 10:38:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:39,082 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:38:39,082 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:38:39,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:38:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-28 10:38:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:38:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-28 10:38:39,092 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-28 10:38:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:39,092 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-28 10:38:39,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:38:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-28 10:38:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:38:39,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:39,093 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-28 10:38:39,093 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:39,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-28 10:38:39,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:39,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:39,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:39,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:39,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:39,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:39,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:39,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:39,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:38:39,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:39,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:39,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:39,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-28 10:38:39,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:38:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:38:39,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:39,996 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 50 states. [2018-09-28 10:38:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:42,629 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-28 10:38:42,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:38:42,629 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2018-09-28 10:38:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:42,630 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:38:42,630 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:38:42,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:38:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:38:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:38:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-28 10:38:42,641 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-28 10:38:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:42,641 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-28 10:38:42,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:38:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-28 10:38:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:38:42,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:42,642 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-28 10:38:42,642 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:42,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-28 10:38:42,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:42,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:42,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:42,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:42,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:42,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:42,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:42,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:42,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-28 10:38:42,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:42,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:43,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:43,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-28 10:38:43,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:38:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:38:43,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:43,360 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-28 10:38:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:44,855 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-28 10:38:44,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:38:44,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-28 10:38:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:44,856 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:38:44,856 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:38:44,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:38:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-28 10:38:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:38:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-28 10:38:44,869 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-28 10:38:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:44,869 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-28 10:38:44,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:38:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-28 10:38:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:38:44,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:44,870 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-28 10:38:44,870 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:44,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-28 10:38:44,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:44,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:44,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:44,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:44,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:45,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:45,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:45,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:45,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:46,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:46,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-28 10:38:46,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:38:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:38:46,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:46,327 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-09-28 10:38:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:49,566 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-28 10:38:49,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:38:49,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2018-09-28 10:38:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:49,566 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:38:49,566 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:38:49,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:38:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:38:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:38:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-28 10:38:49,577 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-28 10:38:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:49,577 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-28 10:38:49,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:38:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-28 10:38:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:38:49,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:49,578 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-28 10:38:49,578 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:49,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-28 10:38:49,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:49,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:49,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:49,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:49,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:49,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:49,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:49,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:50,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:50,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:50,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:50,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-28 10:38:50,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:38:50,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:38:50,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:50,175 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-28 10:38:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:51,095 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-28 10:38:51,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:38:51,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-28 10:38:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:51,096 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:38:51,096 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:38:51,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:38:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-28 10:38:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:38:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-28 10:38:51,106 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-28 10:38:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:51,106 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-28 10:38:51,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:38:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-28 10:38:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:38:51,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:51,107 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-28 10:38:51,107 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:51,107 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-28 10:38:51,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:51,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:51,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:51,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:51,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:51,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:51,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:38:51,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:51,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:52,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-09-28 10:38:52,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:38:52,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:38:52,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:52,301 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 56 states. [2018-09-28 10:38:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:55,498 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-28 10:38:55,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:38:55,498 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2018-09-28 10:38:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:55,499 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:38:55,499 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:38:55,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:38:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:38:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:38:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-28 10:38:55,509 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-28 10:38:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:55,509 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-28 10:38:55,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:38:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-28 10:38:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:38:55,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:55,510 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-28 10:38:55,510 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:55,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-28 10:38:55,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:55,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:55,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:55,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:55,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:55,763 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:55,804 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:55,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:55,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:56,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:56,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-28 10:38:56,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:38:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:38:56,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:56,139 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-28 10:38:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:56,972 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-28 10:38:56,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:38:56,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-28 10:38:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:56,973 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:38:56,973 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:38:56,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:38:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-28 10:38:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:38:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-28 10:38:56,984 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-28 10:38:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:56,985 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-28 10:38:56,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:38:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-28 10:38:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:38:56,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:56,985 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-28 10:38:56,986 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:56,986 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:56,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-28 10:38:56,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:56,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:56,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:56,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:56,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:57,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:57,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:57,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:57,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:38:57,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:57,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:57,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:57,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-28 10:38:57,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:38:57,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:38:57,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:57,962 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2018-09-28 10:39:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:01,836 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-28 10:39:01,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:39:01,836 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2018-09-28 10:39:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:01,837 INFO L225 Difference]: With dead ends: 122 [2018-09-28 10:39:01,837 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:39:01,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:39:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:39:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:39:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-28 10:39:01,849 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-28 10:39:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:01,849 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-28 10:39:01,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:39:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-28 10:39:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:39:01,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:01,850 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-28 10:39:01,850 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:01,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-28 10:39:01,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:01,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:01,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:01,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:01,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:02,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:02,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:02,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:02,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-28 10:39:02,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:02,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:02,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:02,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-28 10:39:02,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:39:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:39:02,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:02,735 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-28 10:39:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:03,530 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-28 10:39:03,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:39:03,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-28 10:39:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:03,531 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:39:03,531 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:39:03,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:39:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-28 10:39:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:39:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-28 10:39:03,543 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-28 10:39:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:03,543 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-28 10:39:03,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:39:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-28 10:39:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:39:03,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:03,544 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-28 10:39:03,544 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:03,544 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-28 10:39:03,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:03,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:03,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:03,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:03,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:03,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:03,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:03,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:04,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:04,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:04,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2018-09-28 10:39:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:39:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:39:04,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:04,507 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 62 states. [2018-09-28 10:39:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:08,497 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-28 10:39:08,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:39:08,498 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 82 [2018-09-28 10:39:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:08,498 INFO L225 Difference]: With dead ends: 128 [2018-09-28 10:39:08,498 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:39:08,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:39:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:39:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:39:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-28 10:39:08,509 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-28 10:39:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:08,510 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-28 10:39:08,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:39:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-28 10:39:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:39:08,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:08,510 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-28 10:39:08,510 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:08,511 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-28 10:39:08,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:08,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:08,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:08,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:08,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:08,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:08,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:08,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:08,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:08,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:08,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:09,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:09,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-28 10:39:09,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:39:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:39:09,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:09,094 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-28 10:39:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:09,965 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-28 10:39:09,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:39:09,965 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-28 10:39:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:09,966 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:39:09,966 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:39:09,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:39:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-28 10:39:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:39:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-28 10:39:09,979 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-28 10:39:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:09,979 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-28 10:39:09,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:39:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-28 10:39:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:39:09,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:09,980 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-28 10:39:09,980 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:09,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-28 10:39:09,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:09,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:09,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:10,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:10,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:10,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:10,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:39:10,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:10,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:11,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:11,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-28 10:39:11,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:39:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:39:11,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:11,044 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 65 states. [2018-09-28 10:39:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:15,423 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-28 10:39:15,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:39:15,423 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2018-09-28 10:39:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:15,424 INFO L225 Difference]: With dead ends: 134 [2018-09-28 10:39:15,424 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:39:15,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:39:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:39:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:39:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-28 10:39:15,436 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-28 10:39:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:15,436 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-28 10:39:15,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:39:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-28 10:39:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:39:15,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:15,437 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-28 10:39:15,437 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:15,437 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-28 10:39:15,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:15,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:15,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:15,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:15,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:15,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:15,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:15,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:15,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:15,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:15,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-28 10:39:15,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:39:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:39:15,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:15,979 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-28 10:39:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:17,035 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-28 10:39:17,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:39:17,036 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-28 10:39:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:17,036 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:39:17,036 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:39:17,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:39:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-28 10:39:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:39:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-28 10:39:17,050 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-28 10:39:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:17,051 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-28 10:39:17,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:39:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-28 10:39:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:39:17,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:17,051 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-28 10:39:17,052 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:17,052 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-28 10:39:17,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:17,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:17,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:17,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:17,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:17,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:17,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:17,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:17,535 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:39:17,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:17,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:18,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:18,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-09-28 10:39:18,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:39:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:39:18,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:18,120 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 68 states. [2018-09-28 10:39:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:22,980 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-28 10:39:22,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:39:22,980 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 90 [2018-09-28 10:39:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:22,981 INFO L225 Difference]: With dead ends: 140 [2018-09-28 10:39:22,981 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:39:22,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:39:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:39:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:39:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-28 10:39:22,993 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-28 10:39:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:22,994 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-28 10:39:22,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:39:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-28 10:39:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:39:22,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:22,995 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-28 10:39:22,995 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:22,995 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-28 10:39:22,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:22,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:22,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:22,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:22,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:23,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:23,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:23,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:23,444 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-28 10:39:23,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:23,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:23,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:23,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-28 10:39:23,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:39:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:39:23,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:23,667 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-28 10:39:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:24,708 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-28 10:39:24,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:39:24,708 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-28 10:39:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:24,709 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:39:24,709 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:39:24,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:39:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-28 10:39:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:39:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-28 10:39:24,723 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-28 10:39:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:24,724 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-28 10:39:24,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:39:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-28 10:39:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:39:24,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:24,725 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-28 10:39:24,725 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:24,725 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-28 10:39:24,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:24,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:24,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:24,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:24,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:25,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:25,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:25,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:25,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:25,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:25,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-09-28 10:39:25,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:39:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:39:25,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:25,982 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 71 states. [2018-09-28 10:39:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:31,500 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-28 10:39:31,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:39:31,500 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2018-09-28 10:39:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:31,501 INFO L225 Difference]: With dead ends: 146 [2018-09-28 10:39:31,501 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:39:31,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:39:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:39:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:39:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-28 10:39:31,515 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-28 10:39:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:31,515 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-28 10:39:31,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:39:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-28 10:39:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:39:31,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:31,516 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-28 10:39:31,516 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:31,516 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-28 10:39:31,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:31,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:31,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:31,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:31,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:31,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:31,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:31,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:31,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:31,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:31,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:32,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:32,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-28 10:39:32,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:39:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:39:32,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:32,169 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-28 10:39:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:33,253 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-28 10:39:33,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:39:33,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-28 10:39:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:33,254 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:39:33,254 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:39:33,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:39:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-28 10:39:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:39:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-28 10:39:33,270 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-28 10:39:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:33,270 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-28 10:39:33,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:39:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-28 10:39:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:39:33,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:33,271 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-28 10:39:33,272 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:33,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:33,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-28 10:39:33,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:33,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:33,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:33,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:33,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:34,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:34,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:34,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:34,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:39:34,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:34,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:36,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:36,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-09-28 10:39:36,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:39:36,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:39:36,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:36,963 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 74 states. [2018-09-28 10:39:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:42,830 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-28 10:39:42,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:39:42,830 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 98 [2018-09-28 10:39:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:42,831 INFO L225 Difference]: With dead ends: 152 [2018-09-28 10:39:42,831 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:39:42,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:39:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:39:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:39:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-28 10:39:42,848 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-28 10:39:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:42,849 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-28 10:39:42,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:39:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-28 10:39:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:39:42,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:42,849 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-28 10:39:42,850 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:42,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-28 10:39:42,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:42,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:42,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:42,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:42,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:43,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:43,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:43,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:43,281 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:43,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:43,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:43,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:43,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-28 10:39:43,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:39:43,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:39:43,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:43,475 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-28 10:39:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:44,548 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-28 10:39:44,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:39:44,548 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-28 10:39:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:44,549 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:39:44,549 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:39:44,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:39:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-28 10:39:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:39:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-28 10:39:44,568 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-28 10:39:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:44,568 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-28 10:39:44,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:39:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-28 10:39:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:39:44,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:44,569 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-28 10:39:44,569 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:44,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-28 10:39:44,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:44,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:44,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:44,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:45,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:45,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:39:45,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:45,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:45,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-28 10:39:45,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:39:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:39:45,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:45,961 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 77 states. [2018-09-28 10:39:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:52,622 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-28 10:39:52,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:39:52,622 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 102 [2018-09-28 10:39:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:52,622 INFO L225 Difference]: With dead ends: 158 [2018-09-28 10:39:52,623 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:39:52,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:39:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:39:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:39:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-28 10:39:52,647 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-28 10:39:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:52,648 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-28 10:39:52,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:39:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-28 10:39:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:39:52,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:52,649 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-28 10:39:52,649 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:52,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-28 10:39:52,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:52,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:52,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:52,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:53,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:53,882 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:53,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-28 10:39:53,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:53,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:54,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-28 10:39:54,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:39:54,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:39:54,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:54,388 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-28 10:39:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:55,575 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-28 10:39:55,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:39:55,575 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-28 10:39:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:55,576 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:39:55,576 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:39:55,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:39:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-28 10:39:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:39:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-28 10:39:55,595 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-28 10:39:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:55,595 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-28 10:39:55,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:39:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-28 10:39:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:39:55,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:55,596 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-28 10:39:55,596 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:55,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-28 10:39:55,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:55,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:55,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:55,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:56,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:56,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:57,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-09-28 10:39:57,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:39:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:39:57,492 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:57,492 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 80 states. [2018-09-28 10:40:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:04,552 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-28 10:40:04,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:40:04,553 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 106 [2018-09-28 10:40:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:04,554 INFO L225 Difference]: With dead ends: 164 [2018-09-28 10:40:04,554 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:40:04,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:40:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:40:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:40:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-28 10:40:04,574 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-28 10:40:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:04,575 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-28 10:40:04,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:40:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-28 10:40:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:40:04,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:04,576 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-28 10:40:04,576 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:04,576 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-28 10:40:04,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:04,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:04,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:04,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:05,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:05,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:05,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:05,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:05,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:06,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:06,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-28 10:40:06,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:40:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:40:06,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:06,075 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-28 10:40:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:07,287 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-28 10:40:07,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:40:07,287 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-28 10:40:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:07,288 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:40:07,288 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:40:07,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:40:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-28 10:40:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:40:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-28 10:40:07,310 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-28 10:40:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:07,310 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-28 10:40:07,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:40:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-28 10:40:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:40:07,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:07,311 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-28 10:40:07,311 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:07,311 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-28 10:40:07,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:07,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:07,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:07,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:07,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:08,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:08,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:08,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:40:08,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:08,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:09,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-09-28 10:40:09,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:40:09,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:40:09,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:09,097 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 83 states. [2018-09-28 10:40:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:13,582 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-28 10:40:13,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:40:13,582 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 110 [2018-09-28 10:40:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:13,583 INFO L225 Difference]: With dead ends: 170 [2018-09-28 10:40:13,583 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:40:13,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:40:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:40:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:40:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-28 10:40:13,601 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-28 10:40:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:13,601 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-28 10:40:13,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:40:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-28 10:40:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:40:13,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:13,602 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-28 10:40:13,602 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:13,602 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-28 10:40:13,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:13,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:13,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:13,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:14,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:14,019 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:14,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:14,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:14,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:14,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-28 10:40:14,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:40:14,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:40:14,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:14,310 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-28 10:40:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:15,541 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-28 10:40:15,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:40:15,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-28 10:40:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:15,542 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:40:15,542 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:40:15,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:40:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-28 10:40:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:40:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-28 10:40:15,566 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-28 10:40:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:15,566 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-28 10:40:15,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:40:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-28 10:40:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:40:15,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:15,567 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-28 10:40:15,567 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:15,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-28 10:40:15,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:15,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:15,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:15,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:16,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:16,151 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:16,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:40:16,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:16,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:17,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:17,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2018-09-28 10:40:17,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:40:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:40:17,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:17,072 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 86 states. [2018-09-28 10:40:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:24,305 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-28 10:40:24,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:40:24,305 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 114 [2018-09-28 10:40:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:24,305 INFO L225 Difference]: With dead ends: 176 [2018-09-28 10:40:24,305 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:40:24,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:40:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:40:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:40:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-28 10:40:24,322 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-28 10:40:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:24,323 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-28 10:40:24,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:40:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-28 10:40:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:40:24,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:24,323 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-28 10:40:24,323 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:24,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-28 10:40:24,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:24,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:24,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:24,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:24,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:24,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:24,905 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:24,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-28 10:40:24,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:24,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:26,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-28 10:40:26,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:40:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:40:26,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:26,116 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-28 10:40:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:29,284 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-28 10:40:29,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:40:29,284 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-28 10:40:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:29,285 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:40:29,285 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:40:29,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:40:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-28 10:40:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:40:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-28 10:40:29,305 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-28 10:40:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:29,305 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-28 10:40:29,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:40:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-28 10:40:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:40:29,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:29,306 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-28 10:40:29,306 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:29,306 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-28 10:40:29,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:29,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:29,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:29,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:29,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:29,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:29,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:29,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:30,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:30,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-28 10:40:30,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:40:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:40:30,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:30,837 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 89 states. [2018-09-28 10:40:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:39,899 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-28 10:40:39,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:40:39,900 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 118 [2018-09-28 10:40:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:39,900 INFO L225 Difference]: With dead ends: 182 [2018-09-28 10:40:39,900 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:40:39,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:40:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:40:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:40:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-28 10:40:39,919 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-28 10:40:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:39,919 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-28 10:40:39,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:40:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-28 10:40:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:40:39,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:39,919 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-28 10:40:39,920 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:39,920 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-28 10:40:39,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:39,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:39,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:39,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:39,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:40,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:40,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:40,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:40,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:40,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:40,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:40,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:40,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-28 10:40:40,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:40:40,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:40:40,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:40,822 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-28 10:40:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:42,145 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-28 10:40:42,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:40:42,145 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-28 10:40:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:42,146 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:40:42,146 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:40:42,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:40:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-28 10:40:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:40:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-28 10:40:42,168 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-28 10:40:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:42,168 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-28 10:40:42,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:40:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-28 10:40:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:40:42,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:42,169 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-28 10:40:42,169 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:42,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-28 10:40:42,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:42,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:42,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:42,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:42,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:42,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:42,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:42,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:42,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:40:42,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:42,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:43,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:43,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-09-28 10:40:43,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:40:43,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:40:43,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:43,842 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 92 states. [2018-09-28 10:40:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:51,960 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-28 10:40:51,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:40:51,960 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 122 [2018-09-28 10:40:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:51,960 INFO L225 Difference]: With dead ends: 188 [2018-09-28 10:40:51,960 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:40:51,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:40:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:40:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:40:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-28 10:40:51,981 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-28 10:40:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:51,982 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-28 10:40:51,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:40:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-28 10:40:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:40:51,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:51,982 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-28 10:40:51,982 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:51,983 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-28 10:40:51,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:51,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:51,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:51,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:51,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:52,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:52,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:52,401 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:52,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:52,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:52,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-28 10:40:52,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:40:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:40:52,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:52,642 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-28 10:40:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:54,297 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-28 10:40:54,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:40:54,297 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-28 10:40:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:54,298 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:40:54,298 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:40:54,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:40:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-28 10:40:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:40:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-28 10:40:54,320 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-28 10:40:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:54,320 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-28 10:40:54,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:40:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-28 10:40:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:40:54,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:54,321 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-28 10:40:54,321 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:54,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-28 10:40:54,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:54,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:54,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:54,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:54,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:55,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:55,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:55,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:55,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:40:55,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:55,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:56,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:56,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-09-28 10:40:56,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:40:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:40:56,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:56,175 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 95 states. [2018-09-28 10:41:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:02,144 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-28 10:41:02,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:41:02,145 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 126 [2018-09-28 10:41:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:02,145 INFO L225 Difference]: With dead ends: 194 [2018-09-28 10:41:02,145 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:41:02,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:41:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:41:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:41:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-28 10:41:02,167 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-28 10:41:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:02,168 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-28 10:41:02,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:41:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-28 10:41:02,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:41:02,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:02,168 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-28 10:41:02,168 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:02,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-28 10:41:02,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:02,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:02,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:02,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:02,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:02,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:02,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:02,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:02,625 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-28 10:41:02,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:02,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:02,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:02,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-28 10:41:02,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:41:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:41:02,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:02,911 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-28 10:41:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:04,457 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-28 10:41:04,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:41:04,457 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-28 10:41:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:04,458 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:41:04,458 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:41:04,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:41:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-28 10:41:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:41:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-28 10:41:04,483 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-28 10:41:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:04,483 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-28 10:41:04,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:41:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-28 10:41:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:41:04,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:04,484 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-28 10:41:04,484 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:04,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-28 10:41:04,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:04,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:04,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:04,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:04,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:05,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:05,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:06,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2018-09-28 10:41:06,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:41:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:41:06,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:06,302 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 98 states. [2018-09-28 10:41:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:17,934 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-28 10:41:17,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:41:17,934 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 130 [2018-09-28 10:41:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:17,934 INFO L225 Difference]: With dead ends: 200 [2018-09-28 10:41:17,935 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:41:17,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:41:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:41:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:41:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-28 10:41:17,955 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-28 10:41:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:17,956 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-28 10:41:17,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:41:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-28 10:41:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:41:17,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:17,957 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-28 10:41:17,957 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:17,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-28 10:41:17,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:17,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:17,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:17,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:18,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:18,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:18,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:18,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:18,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:18,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-28 10:41:18,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:41:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:41:18,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:18,749 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-28 10:41:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:20,533 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-28 10:41:20,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:41:20,534 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-28 10:41:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:20,534 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:41:20,535 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:41:20,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:41:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-28 10:41:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:41:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-28 10:41:20,560 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-28 10:41:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:20,560 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-28 10:41:20,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:41:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-28 10:41:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:41:20,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:20,561 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-28 10:41:20,561 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:20,561 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-28 10:41:20,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:20,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:20,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:20,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:20,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:21,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:21,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:21,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:21,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:41:21,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:21,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:22,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-28 10:41:22,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:41:22,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:41:22,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:22,480 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 101 states. [2018-09-28 10:41:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:35,734 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-28 10:41:35,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:41:35,734 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 134 [2018-09-28 10:41:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:35,735 INFO L225 Difference]: With dead ends: 206 [2018-09-28 10:41:35,735 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:41:35,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:41:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:41:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:41:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-28 10:41:35,759 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-28 10:41:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:35,760 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-28 10:41:35,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:41:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-28 10:41:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:41:35,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:35,761 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-28 10:41:35,761 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:35,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-28 10:41:35,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:35,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:35,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:35,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:35,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:36,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:36,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:36,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:36,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:36,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:36,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-28 10:41:36,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:41:36,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:41:36,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:36,705 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-28 10:41:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:38,299 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-28 10:41:38,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:41:38,299 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-28 10:41:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:38,300 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:41:38,300 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:41:38,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:41:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-28 10:41:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:41:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-28 10:41:38,336 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-28 10:41:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:38,337 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-28 10:41:38,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:41:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-28 10:41:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:41:38,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:38,338 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-28 10:41:38,338 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:38,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-28 10:41:38,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:38,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:38,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:38,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:38,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:38,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:38,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:38,986 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:39,099 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:41:39,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:39,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:40,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:40,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-09-28 10:41:40,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:41:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:41:40,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:40,321 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 104 states. [2018-09-28 10:41:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:53,934 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-28 10:41:53,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:41:53,934 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 138 [2018-09-28 10:41:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:53,934 INFO L225 Difference]: With dead ends: 212 [2018-09-28 10:41:53,934 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:41:53,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:41:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:41:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:41:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-28 10:41:53,958 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-28 10:41:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:53,958 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-28 10:41:53,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:41:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-28 10:41:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:41:53,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:53,959 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-28 10:41:53,959 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:53,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:53,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-28 10:41:53,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:53,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:53,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:53,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:53,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:54,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:54,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:54,424 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-28 10:41:54,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:54,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:54,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-28 10:41:54,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:41:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:41:54,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:54,694 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-28 10:41:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:56,538 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-28 10:41:56,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:41:56,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-28 10:41:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:56,539 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:41:56,539 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:41:56,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:41:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-28 10:41:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:41:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-28 10:41:56,573 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-28 10:41:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:56,573 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-28 10:41:56,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:41:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-28 10:41:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:41:56,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:56,574 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-28 10:41:56,574 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:56,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-28 10:41:56,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:56,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:56,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:56,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:56,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:57,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:57,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:57,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:57,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-28 10:41:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:58,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:58,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2018-09-28 10:41:58,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:41:58,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:41:58,517 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:58,517 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 107 states. [2018-09-28 10:41:58,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-28 10:41:58,518 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:41:58,524 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:41:58,525 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:41:58 BoogieIcfgContainer [2018-09-28 10:41:58,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:41:58,526 INFO L168 Benchmark]: Toolchain (without parser) took 241240.07 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -294.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 346.5 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2018-09-28 10:41:58,527 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:41:58,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:41:58,528 INFO L168 Benchmark]: Boogie Preprocessor took 24.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:41:58,529 INFO L168 Benchmark]: RCFGBuilder took 365.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:41:58,529 INFO L168 Benchmark]: TraceAbstraction took 240802.03 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -294.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 325.4 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:41:58,535 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.38 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 24.07 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 365.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240802.03 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -294.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 325.4 MB). Peak memory consumption was 30.7 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 (143states) and FLOYD_HOARE automaton (currently 2 states, 107 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 240.7s OverallTime, 69 OverallIterations, 35 TraceHistogramMax, 174.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 903 SDtfs, 681 SDslu, 4076 SDs, 0 SdLazy, 31494 SolverSat, 2772 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8835 GetRequests, 4993 SyntacticMatches, 0 SemanticMatches, 3842 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=68, 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: 0.8s AutomataMinimizationTime, 68 MinimizatonAttempts, 136 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 57.6s InterpolantComputationTime, 10198 NumberOfCodeBlocks, 10198 NumberOfCodeBlocksAsserted, 752 NumberOfCheckSat, 10062 ConstructedInterpolants, 0 QuantifiedInterpolants, 3557585 SizeOfPredicates, 201 NumberOfNonLiveVariables, 20034 ConjunctsInSsa, 2712 ConjunctsInUnsatCore, 136 InterpolantComputations, 2 PerfectInterpolantSequences, 57118/111858 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-0-2018-09-28_10-41-58-552.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-0-2018-09-28_10-41-58-552.csv Completed graceful shutdown