java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:18:42,946 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:18:42,949 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:18:42,964 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:18:42,964 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:18:42,965 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:18:42,966 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:18:42,968 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:18:42,970 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:18:42,971 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:18:42,972 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:18:42,972 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:18:42,973 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:18:42,974 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:18:42,975 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:18:42,976 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:18:42,976 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:18:42,978 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:18:42,980 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:18:42,982 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:18:42,983 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:18:42,984 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:18:42,986 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 12:18:42,994 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:18:43,009 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:18:43,009 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:18:43,010 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:18:43,010 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:18:43,011 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:18:43,011 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:18:43,011 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:18:43,011 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:18:43,011 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:18:43,012 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:18:43,012 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:18:43,012 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:18:43,012 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:18:43,012 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:18:43,012 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:18:43,013 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:18:43,013 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:18:43,013 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:18:43,013 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:18:43,013 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:18:43,014 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:18:43,014 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:18:43,014 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:18:43,014 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:18:43,014 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:18:43,015 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:18:43,015 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:18:43,015 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:18:43,015 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:18:43,015 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:18:43,015 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:18:43,071 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:18:43,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:18:43,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:18:43,096 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:18:43,097 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:18:43,098 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-10-02 12:18:43,098 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-10-02 12:18:43,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:18:43,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:18:43,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:18:43,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:18:43,142 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:18:43,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,183 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 12:18:43,183 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 12:18:43,183 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 12:18:43,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:18:43,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:18:43,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:18:43,187 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:18:43,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... [2018-10-02 12:18:43,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:18:43,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:18:43,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:18:43,213 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:18:43,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:18:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 12:18:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 12:18:43,503 INFO L337 CfgBuilder]: Using library mode [2018-10-02 12:18:43,503 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:18:43 BoogieIcfgContainer [2018-10-02 12:18:43,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:18:43,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:18:43,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:18:43,509 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:18:43,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:18:43" (1/2) ... [2018-10-02 12:18:43,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3154cc and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:18:43, skipping insertion in model container [2018-10-02 12:18:43,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:18:43" (2/2) ... [2018-10-02 12:18:43,513 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-10-02 12:18:43,522 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:18:43,533 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:18:43,580 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:18:43,581 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:18:43,581 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:18:43,581 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:18:43,581 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:18:43,581 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:18:43,582 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:18:43,582 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:18:43,582 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:18:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 12:18:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 12:18:43,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:43,604 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 12:18:43,605 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:43,611 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-02 12:18:43,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:43,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:43,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:43,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:43,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:43,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:18:43,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 12:18:43,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:18:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:18:43,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:43,800 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 12:18:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:44,039 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:18:44,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:18:44,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 12:18:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:44,053 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:18:44,053 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 12:18:44,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:18:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 12:18:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 12:18:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 12:18:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 12:18:44,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-02 12:18:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:44,087 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 12:18:44,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:18:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 12:18:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 12:18:44,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:44,088 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 12:18:44,089 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:44,089 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-02 12:18:44,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:44,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:44,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:44,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:44,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:44,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:44,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:44,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:44,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:44,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:44,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-02 12:18:44,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:18:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:18:44,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:44,468 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-02 12:18:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:44,876 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 12:18:44,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:18:44,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-02 12:18:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:44,878 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:18:44,878 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 12:18:44,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:18:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 12:18:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 12:18:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 12:18:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 12:18:44,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-02 12:18:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:44,884 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 12:18:44,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:18:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 12:18:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 12:18:44,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:44,885 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-02 12:18:44,886 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:44,886 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:44,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-02 12:18:44,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:44,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:44,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:44,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:44,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:44,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:44,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:44,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:45,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:45,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:45,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:45,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:45,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-02 12:18:45,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:18:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:18:45,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:45,259 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-02 12:18:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:45,373 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:18:45,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:18:45,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-02 12:18:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:45,375 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:18:45,376 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 12:18:45,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:18:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 12:18:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 12:18:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 12:18:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 12:18:45,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-02 12:18:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:45,380 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 12:18:45,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:18:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 12:18:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:18:45,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:45,382 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-02 12:18:45,382 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:45,382 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-02 12:18:45,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:45,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:45,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:45,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:45,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:45,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:45,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:45,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:18:45,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:45,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:45,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:45,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-02 12:18:45,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:18:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:18:45,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:45,697 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-02 12:18:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:45,830 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:18:45,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:18:45,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-02 12:18:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:45,833 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:18:45,833 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 12:18:45,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:18:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 12:18:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 12:18:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 12:18:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 12:18:45,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-02 12:18:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:45,838 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 12:18:45,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:18:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 12:18:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 12:18:45,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:45,839 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-02 12:18:45,839 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:45,840 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-02 12:18:45,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:45,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:45,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:45,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:46,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:46,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:46,357 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:46,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:46,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:46,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:46,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 12:18:46,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:18:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:18:46,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:46,502 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-02 12:18:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:46,734 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:18:46,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:18:46,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-02 12:18:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:46,736 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:18:46,736 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 12:18:46,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:18:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 12:18:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 12:18:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 12:18:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 12:18:46,741 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-02 12:18:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:46,742 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 12:18:46,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:18:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 12:18:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 12:18:46,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:46,743 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-02 12:18:46,743 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:46,743 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:46,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-02 12:18:46,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:46,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:46,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:46,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:46,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:46,875 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:46,885 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:18:46,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:46,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:47,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:47,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-02 12:18:47,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:18:47,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:18:47,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:47,017 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-02 12:18:47,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:47,233 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:18:47,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:18:47,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-02 12:18:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:47,235 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:18:47,236 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 12:18:47,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:18:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 12:18:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 12:18:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 12:18:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 12:18:47,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-02 12:18:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:47,241 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 12:18:47,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:18:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 12:18:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 12:18:47,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:47,242 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-02 12:18:47,242 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:47,242 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:47,242 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-02 12:18:47,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:47,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:47,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:47,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:47,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:47,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:47,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:47,403 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:47,412 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:18:47,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:47,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:47,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:47,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-02 12:18:47,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:18:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:18:47,690 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:47,690 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-02 12:18:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:47,812 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:18:47,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:18:47,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-02 12:18:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:47,813 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:18:47,814 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 12:18:47,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:18:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 12:18:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 12:18:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 12:18:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 12:18:47,818 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-02 12:18:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:47,818 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 12:18:47,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:18:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 12:18:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 12:18:47,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:47,819 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-02 12:18:47,820 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:47,820 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-02 12:18:47,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:47,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:47,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:47,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:47,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:47,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:47,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:47,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:47,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:48,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:48,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 12:18:48,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:18:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:18:48,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:48,118 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-02 12:18:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:48,327 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:18:48,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:18:48,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-02 12:18:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:48,329 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:18:48,329 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 12:18:48,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:18:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 12:18:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 12:18:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 12:18:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 12:18:48,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-02 12:18:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:48,334 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 12:18:48,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:18:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 12:18:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 12:18:48,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:48,335 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-02 12:18:48,335 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:48,335 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-02 12:18:48,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:48,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:48,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:48,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:48,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:48,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:48,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:48,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:48,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:48,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:48,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:48,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:48,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-02 12:18:48,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:18:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:18:48,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:48,687 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-02 12:18:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:48,898 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:18:48,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:18:48,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-02 12:18:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:48,901 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:18:48,901 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 12:18:48,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:18:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 12:18:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 12:18:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 12:18:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 12:18:48,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-02 12:18:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:48,906 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 12:18:48,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:18:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 12:18:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 12:18:48,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:48,907 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-02 12:18:48,907 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:48,908 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-02 12:18:48,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:48,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:48,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:48,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:48,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:49,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:49,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:49,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:49,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 12:18:49,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:49,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:49,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:49,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-02 12:18:49,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:18:49,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:18:49,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:49,359 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-02 12:18:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:49,874 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:18:49,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:18:49,874 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-02 12:18:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:49,875 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:18:49,876 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 12:18:49,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:18:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 12:18:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 12:18:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 12:18:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 12:18:49,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-02 12:18:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:49,882 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 12:18:49,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:18:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 12:18:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 12:18:49,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:49,883 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-02 12:18:49,883 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:49,883 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-02 12:18:49,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:49,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:49,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:49,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:49,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:50,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:50,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:50,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:50,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:50,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:50,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:50,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:50,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 12:18:50,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:18:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:18:50,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:50,294 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-02 12:18:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:50,496 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:18:50,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:18:50,497 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-02 12:18:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:50,498 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:18:50,498 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 12:18:50,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:18:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 12:18:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 12:18:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 12:18:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 12:18:50,503 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-02 12:18:50,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:50,503 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 12:18:50,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:18:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 12:18:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 12:18:50,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:50,504 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-02 12:18:50,505 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:50,505 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-02 12:18:50,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:50,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:50,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:50,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:50,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:50,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:50,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:50,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:50,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:18:50,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:50,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:51,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:51,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 12:18:51,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:18:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:18:51,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:51,245 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-02 12:18:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:51,477 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:18:51,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:18:51,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-02 12:18:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:51,479 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:18:51,479 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 12:18:51,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:18:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 12:18:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 12:18:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 12:18:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 12:18:51,485 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-02 12:18:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:51,485 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 12:18:51,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:18:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 12:18:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 12:18:51,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:51,486 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-02 12:18:51,486 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:51,487 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:51,487 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-02 12:18:51,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:51,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:51,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:51,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:51,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:51,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:51,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:51,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:51,797 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:18:51,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:51,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:52,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:52,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-02 12:18:52,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:18:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:18:52,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:52,039 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-02 12:18:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:52,317 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:18:52,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:18:52,317 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-02 12:18:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:52,318 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:18:52,319 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 12:18:52,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:18:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 12:18:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 12:18:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 12:18:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 12:18:52,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-02 12:18:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:52,324 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 12:18:52,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:18:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 12:18:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 12:18:52,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:52,325 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-02 12:18:52,326 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:52,326 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-02 12:18:52,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:52,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:52,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:52,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:52,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:52,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:52,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:52,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:52,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:52,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:52,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 12:18:52,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:18:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:18:52,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:52,924 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-02 12:18:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:53,257 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:18:53,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:18:53,257 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-02 12:18:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:53,258 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:18:53,258 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 12:18:53,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:18:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 12:18:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 12:18:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 12:18:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 12:18:53,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-02 12:18:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:53,265 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 12:18:53,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:18:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 12:18:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 12:18:53,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:53,266 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-02 12:18:53,266 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:53,267 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-02 12:18:53,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:53,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:53,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:53,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:53,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:53,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:53,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:53,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:53,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:53,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:53,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:53,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:53,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-02 12:18:53,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:18:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:18:53,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:53,873 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-02 12:18:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:54,119 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:18:54,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:18:54,120 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-02 12:18:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:54,121 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:18:54,121 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 12:18:54,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:18:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 12:18:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 12:18:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 12:18:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 12:18:54,128 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-02 12:18:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:54,128 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 12:18:54,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:18:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 12:18:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 12:18:54,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:54,129 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-02 12:18:54,129 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:54,129 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-02 12:18:54,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:54,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:54,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:54,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:54,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:54,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:54,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:54,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:54,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 12:18:54,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:54,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:55,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:55,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-02 12:18:55,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:18:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:18:55,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:55,353 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-02 12:18:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:55,612 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:18:55,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:18:55,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-02 12:18:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:55,614 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:18:55,614 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 12:18:55,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:18:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 12:18:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 12:18:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 12:18:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 12:18:55,621 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-02 12:18:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:55,621 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 12:18:55,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:18:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 12:18:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 12:18:55,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:55,622 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-02 12:18:55,623 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:55,623 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-02 12:18:55,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:55,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:55,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:55,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:55,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:55,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:55,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:55,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:55,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:56,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:56,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 12:18:56,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:18:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:18:56,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:56,268 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-02 12:18:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:56,618 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:18:56,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:18:56,619 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-02 12:18:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:56,619 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:18:56,620 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 12:18:56,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:18:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 12:18:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 12:18:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 12:18:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 12:18:56,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-02 12:18:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:56,624 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 12:18:56,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:18:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 12:18:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 12:18:56,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:56,625 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-02 12:18:56,626 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:56,626 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-02 12:18:56,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:56,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:56,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:56,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:56,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:56,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:56,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:56,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:56,969 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 12:18:56,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:56,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:57,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:57,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-02 12:18:57,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:18:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:18:57,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:57,272 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-02 12:18:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:57,602 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:18:57,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:18:57,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-02 12:18:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:57,604 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:18:57,604 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 12:18:57,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime [2018-10-02 12:18:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 12:18:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 12:18:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 12:18:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 12:18:57,613 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-02 12:18:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:57,613 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 12:18:57,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:18:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 12:18:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 12:18:57,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:57,617 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-02 12:18:57,617 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:57,617 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-02 12:18:57,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:57,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:57,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:57,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:57,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:58,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:58,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:58,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:58,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 12:18:58,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:58,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:58,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:58,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-02 12:18:58,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:18:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:18:58,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:58,805 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-02 12:18:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:59,108 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:18:59,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:18:59,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-02 12:18:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:59,109 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:18:59,109 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 12:18:59,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime [2018-10-02 12:18:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 12:18:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 12:18:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 12:18:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 12:18:59,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-02 12:18:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:59,114 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 12:18:59,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:18:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 12:18:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 12:18:59,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:59,115 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-02 12:18:59,116 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:59,116 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-02 12:18:59,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:59,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:59,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:59,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:59,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:59,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:59,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:59,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:59,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:59,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:59,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 12:18:59,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 12:18:59,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 12:18:59,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:59,730 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-02 12:19:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:00,061 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 12:19:00,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:19:00,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-02 12:19:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:00,062 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:19:00,063 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 12:19:00,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:19:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 12:19:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 12:19:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 12:19:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 12:19:00,068 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-02 12:19:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:00,069 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 12:19:00,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 12:19:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 12:19:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 12:19:00,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:00,070 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-02 12:19:00,070 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:00,070 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-02 12:19:00,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:00,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:00,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:00,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:00,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:00,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:00,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:00,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:00,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:00,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:00,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:01,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:01,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-02 12:19:01,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:19:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:19:01,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:01,438 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-02 12:19:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:01,824 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 12:19:01,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:19:01,824 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-02 12:19:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:01,825 INFO L225 Difference]: With dead ends: 47 [2018-10-02 12:19:01,825 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 12:19:01,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:19:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 12:19:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 12:19:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 12:19:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 12:19:01,831 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-02 12:19:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:01,832 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 12:19:01,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:19:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 12:19:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 12:19:01,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:01,833 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-02 12:19:01,833 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:01,833 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-02 12:19:01,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:01,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:01,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:01,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:01,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:02,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:02,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:02,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:02,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 12:19:02,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:02,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:04,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:04,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-02 12:19:04,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 12:19:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 12:19:04,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:04,142 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-02 12:19:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:04,481 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 12:19:04,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:19:04,482 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-02 12:19:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:04,483 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:19:04,483 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 12:19:04,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime [2018-10-02 12:19:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 12:19:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 12:19:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 12:19:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 12:19:04,488 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-02 12:19:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:04,488 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 12:19:04,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 12:19:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 12:19:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 12:19:04,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:04,489 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-02 12:19:04,489 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:04,489 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-02 12:19:04,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:04,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:04,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:04,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:04,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:04,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:04,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:04,773 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:04,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:04,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:06,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:06,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 12:19:06,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 12:19:06,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 12:19:06,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:06,086 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-02 12:19:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:06,421 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 12:19:06,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:19:06,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-02 12:19:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:06,423 INFO L225 Difference]: With dead ends: 51 [2018-10-02 12:19:06,423 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 12:19:06,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime [2018-10-02 12:19:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 12:19:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 12:19:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 12:19:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 12:19:06,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-02 12:19:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:06,428 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 12:19:06,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 12:19:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 12:19:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 12:19:06,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:06,429 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-02 12:19:06,430 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:06,430 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-02 12:19:06,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:06,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:06,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:06,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:06,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:07,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:07,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:07,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:07,228 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 12:19:07,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:07,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:08,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:08,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 12:19:08,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:19:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:19:08,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:08,285 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-02 12:19:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:08,611 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 12:19:08,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:19:08,612 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-02 12:19:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:08,612 INFO L225 Difference]: With dead ends: 53 [2018-10-02 12:19:08,612 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 12:19:08,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.0s impTime [2018-10-02 12:19:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 12:19:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 12:19:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 12:19:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 12:19:08,617 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-02 12:19:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:08,617 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 12:19:08,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:19:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 12:19:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 12:19:08,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:08,619 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-02 12:19:08,619 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:08,619 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:08,620 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-02 12:19:08,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:08,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:08,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:08,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:08,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:09,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:09,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:09,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:09,314 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 12:19:09,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:09,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:09,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:09,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-02 12:19:09,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 12:19:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 12:19:09,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:09,718 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-02 12:19:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:10,045 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 12:19:10,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:19:10,045 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-02 12:19:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:10,046 INFO L225 Difference]: With dead ends: 55 [2018-10-02 12:19:10,046 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 12:19:10,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:19:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 12:19:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 12:19:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 12:19:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 12:19:10,050 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-02 12:19:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:10,050 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 12:19:10,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 12:19:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 12:19:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 12:19:10,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:10,051 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-02 12:19:10,052 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:10,052 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:10,052 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-02 12:19:10,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:10,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:10,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:10,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:10,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:10,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:10,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:10,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:10,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:11,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:11,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 12:19:11,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:19:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:19:11,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:11,036 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-02 12:19:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:11,392 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 12:19:11,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:19:11,393 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-02 12:19:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:11,393 INFO L225 Difference]: With dead ends: 57 [2018-10-02 12:19:11,394 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 12:19:11,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:19:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 12:19:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 12:19:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 12:19:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 12:19:11,400 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-02 12:19:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:11,400 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 12:19:11,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:19:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 12:19:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 12:19:11,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:11,401 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-02 12:19:11,401 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:11,401 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-02 12:19:11,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:11,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:11,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:11,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:11,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:11,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:11,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:11,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:11,968 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:11,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:11,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:12,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:12,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-02 12:19:12,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:19:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:19:12,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:12,494 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-02 12:19:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:12,970 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 12:19:12,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:19:12,970 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-02 12:19:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:12,971 INFO L225 Difference]: With dead ends: 59 [2018-10-02 12:19:12,971 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 12:19:12,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:19:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 12:19:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 12:19:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 12:19:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 12:19:12,976 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-02 12:19:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:12,976 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 12:19:12,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:19:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 12:19:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 12:19:12,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:12,977 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-02 12:19:12,977 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:12,978 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-02 12:19:12,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:12,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:12,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:12,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:12,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:13,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:13,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:13,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:13,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 12:19:13,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:13,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:14,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:14,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-02 12:19:14,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:19:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:19:14,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:14,325 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-02 12:19:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:14,674 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 12:19:14,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:19:14,675 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-02 12:19:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:14,676 INFO L225 Difference]: With dead ends: 61 [2018-10-02 12:19:14,676 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 12:19:14,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime [2018-10-02 12:19:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 12:19:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 12:19:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 12:19:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 12:19:14,680 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-02 12:19:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:14,680 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 12:19:14,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:19:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 12:19:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 12:19:14,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:14,681 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-02 12:19:14,682 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:14,682 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-02 12:19:14,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:14,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:14,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:14,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:14,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:15,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:15,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:15,137 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:15,154 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:15,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:15,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:16,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:16,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 12:19:16,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 12:19:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 12:19:16,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:16,293 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-02 12:19:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:16,893 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 12:19:16,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:19:16,894 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-02 12:19:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:16,894 INFO L225 Difference]: With dead ends: 63 [2018-10-02 12:19:16,895 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 12:19:16,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime [2018-10-02 12:19:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 12:19:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 12:19:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 12:19:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 12:19:16,900 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-02 12:19:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:16,900 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 12:19:16,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 12:19:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 12:19:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 12:19:16,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:16,901 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-02 12:19:16,901 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:16,901 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-02 12:19:16,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:16,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:16,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:16,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:16,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:17,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:17,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:17,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:17,338 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 12:19:17,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:17,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:17,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:17,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-02 12:19:17,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 12:19:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 12:19:17,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:17,958 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-02 12:19:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:18,538 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 12:19:18,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:19:18,539 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-02 12:19:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:18,540 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:19:18,540 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 12:19:18,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:19:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 12:19:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 12:19:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 12:19:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 12:19:18,544 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-02 12:19:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:18,544 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 12:19:18,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 12:19:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 12:19:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 12:19:18,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:18,545 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-02 12:19:18,546 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:18,546 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-02 12:19:18,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:18,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:18,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:18,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:18,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:19,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:19,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:19,405 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:19,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 12:19:19,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:19,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:20,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:20,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-02 12:19:20,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 12:19:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 12:19:20,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:20,085 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-02 12:19:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:20,510 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 12:19:20,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:19:20,511 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-02 12:19:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:20,512 INFO L225 Difference]: With dead ends: 67 [2018-10-02 12:19:20,512 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 12:19:20,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:19:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 12:19:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 12:19:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 12:19:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 12:19:20,515 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-02 12:19:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:20,516 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 12:19:20,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 12:19:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 12:19:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 12:19:20,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:20,516 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-02 12:19:20,516 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:20,517 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:20,517 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-02 12:19:20,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:20,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:20,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:20,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:20,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:21,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:21,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:21,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:21,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:22,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:22,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 12:19:22,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 12:19:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 12:19:22,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:22,006 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-02 12:19:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:22,459 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 12:19:22,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:19:22,459 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-02 12:19:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:22,460 INFO L225 Difference]: With dead ends: 69 [2018-10-02 12:19:22,460 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 12:19:22,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:19:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 12:19:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 12:19:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 12:19:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 12:19:22,463 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-02 12:19:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:22,463 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 12:19:22,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 12:19:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 12:19:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 12:19:22,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:22,464 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-02 12:19:22,464 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:22,464 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-02 12:19:22,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:22,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:22,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:22,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:22,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:23,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:23,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:23,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:23,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:23,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:23,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:24,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:24,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-02 12:19:24,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 12:19:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 12:19:24,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:24,334 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-02 12:19:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:24,852 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 12:19:24,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:19:24,852 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-02 12:19:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:24,853 INFO L225 Difference]: With dead ends: 71 [2018-10-02 12:19:24,853 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 12:19:24,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime [2018-10-02 12:19:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 12:19:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 12:19:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 12:19:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 12:19:24,856 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-02 12:19:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:24,856 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 12:19:24,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 12:19:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 12:19:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 12:19:24,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:24,857 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-02 12:19:24,857 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:24,858 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-02 12:19:24,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:24,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:24,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:25,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:25,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:25,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:25,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 12:19:25,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:25,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:26,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:26,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-02 12:19:26,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 12:19:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 12:19:26,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:26,506 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-02 12:19:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:27,063 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 12:19:27,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:19:27,064 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-02 12:19:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:27,065 INFO L225 Difference]: With dead ends: 73 [2018-10-02 12:19:27,065 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 12:19:27,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime [2018-10-02 12:19:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 12:19:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 12:19:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 12:19:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 12:19:27,069 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-02 12:19:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:27,069 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 12:19:27,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 12:19:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 12:19:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 12:19:27,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:27,070 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-02 12:19:27,070 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:27,070 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-02 12:19:27,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:27,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:27,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:27,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:27,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:27,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:27,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:27,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:27,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:27,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:27,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:28,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:28,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 12:19:28,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 12:19:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 12:19:28,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:28,180 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-02 12:19:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:28,631 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 12:19:28,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:19:28,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-02 12:19:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:28,632 INFO L225 Difference]: With dead ends: 75 [2018-10-02 12:19:28,632 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 12:19:28,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:19:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 12:19:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 12:19:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 12:19:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 12:19:28,636 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-02 12:19:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:28,636 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 12:19:28,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 12:19:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 12:19:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 12:19:28,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:28,637 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-02 12:19:28,637 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:28,637 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-02 12:19:28,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:28,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:28,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:28,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:28,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:29,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:29,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:29,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:29,200 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 12:19:29,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:29,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:30,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:30,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-02 12:19:30,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 12:19:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 12:19:30,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:30,197 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-02 12:19:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:31,052 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 12:19:31,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:19:31,053 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-02 12:19:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:31,054 INFO L225 Difference]: With dead ends: 77 [2018-10-02 12:19:31,054 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 12:19:31,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:19:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 12:19:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 12:19:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 12:19:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 12:19:31,058 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-02 12:19:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:31,059 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 12:19:31,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 12:19:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 12:19:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 12:19:31,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:31,060 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-02 12:19:31,060 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:31,060 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-02 12:19:31,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:31,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:31,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:31,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:31,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:31,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:31,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:31,816 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:31,853 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 12:19:31,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:31,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:32,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:32,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-02 12:19:32,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 12:19:32,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 12:19:32,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:32,578 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-02 12:19:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:33,032 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 12:19:33,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:19:33,033 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-02 12:19:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:33,034 INFO L225 Difference]: With dead ends: 79 [2018-10-02 12:19:33,034 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 12:19:33,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:19:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 12:19:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 12:19:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 12:19:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 12:19:33,037 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-02 12:19:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:33,037 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 12:19:33,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 12:19:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 12:19:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 12:19:33,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:33,038 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-02 12:19:33,038 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:33,039 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:33,039 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-02 12:19:33,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:33,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:33,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:33,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:33,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:34,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:34,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:34,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:34,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:35,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:35,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 12:19:35,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 12:19:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 12:19:35,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:35,785 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-02 12:19:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:36,442 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 12:19:36,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:19:36,443 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-02 12:19:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:36,444 INFO L225 Difference]: With dead ends: 81 [2018-10-02 12:19:36,444 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 12:19:36,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime [2018-10-02 12:19:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 12:19:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 12:19:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 12:19:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 12:19:36,449 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-02 12:19:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:36,449 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 12:19:36,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 12:19:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 12:19:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 12:19:36,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:36,450 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-02 12:19:36,450 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:36,450 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:36,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-02 12:19:36,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:36,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:36,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:36,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:36,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:37,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:37,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:37,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:37,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:37,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:37,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:38,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:38,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-02 12:19:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 12:19:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 12:19:38,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:38,423 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-02 12:19:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:39,042 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 12:19:39,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:19:39,043 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-02 12:19:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:39,044 INFO L225 Difference]: With dead ends: 83 [2018-10-02 12:19:39,044 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 12:19:39,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime [2018-10-02 12:19:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 12:19:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 12:19:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 12:19:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 12:19:39,050 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-02 12:19:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:39,050 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 12:19:39,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 12:19:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 12:19:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 12:19:39,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:39,051 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-02 12:19:39,051 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:39,051 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-02 12:19:39,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:39,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:39,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:39,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:39,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:40,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:40,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:40,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:40,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 12:19:40,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:40,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:41,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:41,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-02 12:19:41,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 12:19:41,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 12:19:41,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:41,575 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-02 12:19:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:42,207 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 12:19:42,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:19:42,207 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-02 12:19:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:42,208 INFO L225 Difference]: With dead ends: 85 [2018-10-02 12:19:42,208 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 12:19:42,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.0s impTime [2018-10-02 12:19:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 12:19:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 12:19:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 12:19:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 12:19:42,211 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-02 12:19:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:42,212 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 12:19:42,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 12:19:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 12:19:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 12:19:42,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:42,212 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-02 12:19:42,213 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:42,213 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-02 12:19:42,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:42,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:42,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:42,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:42,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:43,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:43,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:43,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:43,205 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:43,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:43,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:44,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:44,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 12:19:44,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 12:19:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 12:19:44,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:44,301 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-02 12:19:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:45,134 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 12:19:45,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:19:45,135 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-02 12:19:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:45,136 INFO L225 Difference]: With dead ends: 87 [2018-10-02 12:19:45,136 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 12:19:45,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime [2018-10-02 12:19:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 12:19:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 12:19:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 12:19:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 12:19:45,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-02 12:19:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:45,141 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 12:19:45,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 12:19:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 12:19:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 12:19:45,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:45,142 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-02 12:19:45,142 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:45,142 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-02 12:19:45,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:45,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:45,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:45,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:45,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:45,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:45,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:45,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:45,861 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 12:19:45,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:45,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:46,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:46,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-02 12:19:46,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 12:19:46,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 12:19:46,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:46,692 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-02 12:19:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:47,326 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 12:19:47,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:19:47,326 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-02 12:19:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:47,327 INFO L225 Difference]: With dead ends: 89 [2018-10-02 12:19:47,327 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 12:19:47,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:19:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 12:19:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 12:19:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 12:19:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 12:19:47,332 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-02 12:19:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:47,332 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 12:19:47,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 12:19:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 12:19:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 12:19:47,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:47,333 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-02 12:19:47,333 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:47,333 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-02 12:19:47,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:47,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:47,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:47,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:47,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:48,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:48,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:48,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:48,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 12:19:48,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:48,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:49,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:49,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-02 12:19:49,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 12:19:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 12:19:49,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:49,546 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-02 12:19:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:50,242 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 12:19:50,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:19:50,243 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-02 12:19:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:50,244 INFO L225 Difference]: With dead ends: 91 [2018-10-02 12:19:50,244 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 12:19:50,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime [2018-10-02 12:19:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 12:19:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 12:19:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 12:19:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 12:19:50,250 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-02 12:19:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:50,250 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 12:19:50,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 12:19:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 12:19:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 12:19:50,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:50,251 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-02 12:19:50,251 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:50,251 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-02 12:19:50,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:50,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:50,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:52,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:52,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:52,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:52,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:53,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:53,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 12:19:53,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 12:19:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 12:19:53,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:53,564 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-02 12:19:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:54,182 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 12:19:54,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 12:19:54,182 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-02 12:19:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:54,183 INFO L225 Difference]: With dead ends: 93 [2018-10-02 12:19:54,183 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 12:19:54,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime [2018-10-02 12:19:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 12:19:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 12:19:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 12:19:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 12:19:54,187 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-02 12:19:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:54,188 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 12:19:54,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 12:19:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 12:19:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 12:19:54,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:54,189 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-02 12:19:54,189 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:54,189 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:54,189 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-02 12:19:54,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:54,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:54,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:54,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:54,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:55,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:55,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:55,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:55,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:55,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:55,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:56,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:56,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-02 12:19:56,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 12:19:56,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 12:19:56,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:56,589 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-02 12:19:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:57,243 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 12:19:57,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:19:57,244 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-02 12:19:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:57,245 INFO L225 Difference]: With dead ends: 95 [2018-10-02 12:19:57,245 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 12:19:57,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime [2018-10-02 12:19:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 12:19:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 12:19:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 12:19:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 12:19:57,249 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-02 12:19:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:57,249 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 12:19:57,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 12:19:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 12:19:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 12:19:57,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:57,250 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-02 12:19:57,251 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:57,251 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-02 12:19:57,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:57,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:57,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:57,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:57,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:58,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:58,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:58,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:58,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 12:19:58,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:58,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:00,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:00,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-02 12:20:00,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 12:20:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 12:20:00,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:00,310 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-02 12:20:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:00,925 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 12:20:00,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 12:20:00,925 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-02 12:20:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:00,926 INFO L225 Difference]: With dead ends: 97 [2018-10-02 12:20:00,926 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 12:20:00,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime [2018-10-02 12:20:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 12:20:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 12:20:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 12:20:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 12:20:00,930 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-02 12:20:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:00,930 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 12:20:00,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 12:20:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 12:20:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 12:20:00,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:00,931 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-02 12:20:00,931 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:00,931 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-02 12:20:00,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:00,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:00,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:00,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:00,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:01,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:01,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:01,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:20:02,007 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:20:02,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:02,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:02,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:02,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-02 12:20:02,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 12:20:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 12:20:02,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:02,990 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-02 12:20:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:03,610 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 12:20:03,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 12:20:03,610 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-02 12:20:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:03,611 INFO L225 Difference]: With dead ends: 99 [2018-10-02 12:20:03,611 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 12:20:03,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.4s impTime [2018-10-02 12:20:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 12:20:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 12:20:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 12:20:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 12:20:03,615 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-02 12:20:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:03,615 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 12:20:03,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 12:20:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 12:20:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 12:20:03,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:03,615 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-02 12:20:03,616 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:03,616 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:03,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-02 12:20:03,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:03,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:03,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:03,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:03,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:04,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:04,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:04,413 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:20:04,461 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 12:20:04,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:04,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:05,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:05,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-02 12:20:05,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 12:20:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 12:20:05,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:05,566 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-02 12:20:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:06,197 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 12:20:06,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:20:06,197 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-02 12:20:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:06,198 INFO L225 Difference]: With dead ends: 101 [2018-10-02 12:20:06,198 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 12:20:06,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime [2018-10-02 12:20:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 12:20:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 12:20:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 12:20:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 12:20:06,202 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-02 12:20:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:06,202 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 12:20:06,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 12:20:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 12:20:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 12:20:06,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:06,203 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-02 12:20:06,203 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:06,203 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-02 12:20:06,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:06,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:06,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:06,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:06,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:07,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:07,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:07,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:20:07,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 12:20:07,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:07,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:08,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:08,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-02 12:20:08,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 12:20:08,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 12:20:08,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:08,377 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-02 12:20:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:08,969 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 12:20:08,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:20:08,970 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-02 12:20:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:08,971 INFO L225 Difference]: With dead ends: 103 [2018-10-02 12:20:08,971 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 12:20:08,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime [2018-10-02 12:20:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 12:20:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 12:20:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 12:20:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 12:20:08,976 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-02 12:20:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:08,976 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 12:20:08,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 12:20:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 12:20:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 12:20:08,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:08,977 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-02 12:20:08,977 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:08,977 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:08,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-02 12:20:08,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:08,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:08,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:08,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:08,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:10,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:10,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:10,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:10,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:13,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:13,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-02 12:20:13,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 12:20:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 12:20:13,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:13,068 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-02 12:20:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:13,694 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 12:20:13,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 12:20:13,695 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-02 12:20:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:13,695 INFO L225 Difference]: With dead ends: 105 [2018-10-02 12:20:13,696 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 12:20:13,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.2s impTime [2018-10-02 12:20:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 12:20:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 12:20:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 12:20:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 12:20:13,700 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-02 12:20:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:13,700 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 12:20:13,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 12:20:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 12:20:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 12:20:13,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:13,701 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-02 12:20:13,701 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:13,702 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-02 12:20:13,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:13,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:13,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:13,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:13,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:15,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:15,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:15,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:20:15,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:20:15,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:15,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:17,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:17,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-02 12:20:17,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 12:20:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 12:20:17,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:17,625 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-02 12:20:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:19,147 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 12:20:19,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 12:20:19,148 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-02 12:20:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:19,149 INFO L225 Difference]: With dead ends: 107 [2018-10-02 12:20:19,149 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 12:20:19,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.0s impTime [2018-10-02 12:20:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 12:20:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 12:20:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 12:20:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 12:20:19,155 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-02 12:20:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:19,155 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 12:20:19,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 12:20:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 12:20:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 12:20:19,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:19,156 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-02 12:20:19,156 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:19,156 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-02 12:20:19,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:19,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:19,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:19,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:19,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:21,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:21,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:21,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:20:21,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 12:20:21,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:21,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:22,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:22,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-02 12:20:22,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 12:20:22,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 12:20:22,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:22,760 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-02 12:20:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:23,548 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 12:20:23,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:20:23,549 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-02 12:20:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:23,550 INFO L225 Difference]: With dead ends: 109 [2018-10-02 12:20:23,550 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 12:20:23,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.8s impTime [2018-10-02 12:20:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 12:20:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 12:20:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 12:20:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 12:20:23,554 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-02 12:20:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:23,555 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 12:20:23,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 12:20:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 12:20:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 12:20:23,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:23,555 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-02 12:20:23,555 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:23,555 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-02 12:20:23,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:23,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:23,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:23,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:23,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:25,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:25,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:25,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:20:25,211 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:20:25,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:25,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:27,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:27,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-02 12:20:27,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 12:20:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 12:20:27,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:27,133 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-02 12:20:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:28,111 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 12:20:28,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:20:28,112 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-02 12:20:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:28,113 INFO L225 Difference]: With dead ends: 111 [2018-10-02 12:20:28,113 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 12:20:28,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime [2018-10-02 12:20:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 12:20:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 12:20:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 12:20:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-02 12:20:28,117 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-02 12:20:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:28,117 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-02 12:20:28,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 12:20:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-02 12:20:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 12:20:28,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:28,118 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-02 12:20:28,119 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:28,119 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-02 12:20:28,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:28,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:28,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:28,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:28,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:29,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:29,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:29,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:20:29,374 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 12:20:29,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:29,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:31,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:31,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-02 12:20:31,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 12:20:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 12:20:31,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:31,404 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-02 12:20:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:32,058 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 12:20:32,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:20:32,058 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-02 12:20:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:32,059 INFO L225 Difference]: With dead ends: 113 [2018-10-02 12:20:32,059 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 12:20:32,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.6s impTime [2018-10-02 12:20:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 12:20:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 12:20:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 12:20:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-02 12:20:32,062 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-02 12:20:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:32,063 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-02 12:20:32,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 12:20:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-02 12:20:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 12:20:32,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:32,063 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-02 12:20:32,063 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:32,064 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-02 12:20:32,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:32,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:32,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:32,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:32,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:34,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:34,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:34,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:20:34,112 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 12:20:34,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:34,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:35,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:35,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-02 12:20:35,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 12:20:35,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 12:20:35,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:35,963 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-02 12:20:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:37,413 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 12:20:37,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:20:37,413 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-02 12:20:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:37,414 INFO L225 Difference]: With dead ends: 115 [2018-10-02 12:20:37,414 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 12:20:37,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.1s impTime [2018-10-02 12:20:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 12:20:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 12:20:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 12:20:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-02 12:20:37,417 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-02 12:20:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:37,417 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-02 12:20:37,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 12:20:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-02 12:20:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 12:20:37,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:37,418 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-02 12:20:37,419 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:37,419 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-02 12:20:37,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:37,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:37,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:37,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:37,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:39,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:39,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:39,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:39,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:40,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:40,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-02 12:20:40,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 12:20:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 12:20:40,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:40,831 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-02 12:20:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:41,610 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 12:20:41,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:20:41,610 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-02 12:20:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:41,612 INFO L225 Difference]: With dead ends: 117 [2018-10-02 12:20:41,612 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 12:20:41,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.9s impTime [2018-10-02 12:20:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 12:20:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-02 12:20:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 12:20:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-02 12:20:41,617 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-02 12:20:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:41,617 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-02 12:20:41,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 12:20:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-02 12:20:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-02 12:20:41,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:41,618 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-02 12:20:41,618 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:41,618 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:41,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-02 12:20:41,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:41,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:41,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:41,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:41,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:43,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:43,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:43,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:20:43,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:20:43,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:43,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:44,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:44,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-02 12:20:44,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-02 12:20:44,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-02 12:20:44,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:44,849 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-02 12:20:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:45,814 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 12:20:45,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:20:45,814 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-02 12:20:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:45,815 INFO L225 Difference]: With dead ends: 119 [2018-10-02 12:20:45,815 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 12:20:45,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.7s impTime [2018-10-02 12:20:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 12:20:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-02 12:20:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 12:20:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-02 12:20:45,819 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-02 12:20:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:45,819 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-02 12:20:45,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-02 12:20:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-02 12:20:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-02 12:20:45,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:45,820 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-02 12:20:45,820 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:45,820 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-02 12:20:45,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:45,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:45,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:45,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:45,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:47,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:47,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:47,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:20:47,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 12:20:47,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:47,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:49,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:49,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-02 12:20:49,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 12:20:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 12:20:49,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:49,741 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-02 12:20:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:50,535 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 12:20:50,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 12:20:50,535 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-02 12:20:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:50,536 INFO L225 Difference]: With dead ends: 121 [2018-10-02 12:20:50,536 INFO L226 Difference]: Without dead ends: 120 [2018-10-02 12:20:50,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime [2018-10-02 12:20:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-02 12:20:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-02 12:20:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-02 12:20:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-02 12:20:50,541 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-02 12:20:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:50,541 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-02 12:20:50,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 12:20:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-02 12:20:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-02 12:20:50,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:50,541 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-02 12:20:50,542 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:50,542 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-02 12:20:50,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:50,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:50,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:50,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:51,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:51,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:51,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:20:51,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:20:51,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:51,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:53,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:53,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-02 12:20:53,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-02 12:20:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-02 12:20:53,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:53,348 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-02 12:20:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:54,081 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 12:20:54,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 12:20:54,081 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-02 12:20:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:54,082 INFO L225 Difference]: With dead ends: 123 [2018-10-02 12:20:54,082 INFO L226 Difference]: Without dead ends: 122 [2018-10-02 12:20:54,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime [2018-10-02 12:20:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-02 12:20:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-02 12:20:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 12:20:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-02 12:20:54,086 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-02 12:20:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:54,086 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-02 12:20:54,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-02 12:20:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-02 12:20:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-02 12:20:54,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:54,087 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-02 12:20:54,087 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:54,087 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-02 12:20:54,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:54,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:54,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:54,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:54,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:55,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:55,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:55,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:20:55,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 12:20:55,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:55,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:58,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:58,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-02 12:20:58,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-02 12:20:58,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-02 12:20:58,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:58,154 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-02 12:20:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:59,248 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 12:20:59,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 12:20:59,248 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-02 12:20:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:59,249 INFO L225 Difference]: With dead ends: 125 [2018-10-02 12:20:59,249 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 12:20:59,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.3s impTime [2018-10-02 12:20:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 12:20:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-02 12:20:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 12:20:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-02 12:20:59,253 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-02 12:20:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:59,254 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-02 12:20:59,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-02 12:20:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-02 12:20:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-02 12:20:59,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:59,255 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-02 12:20:59,255 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:59,255 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:59,256 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-02 12:20:59,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:59,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:59,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:59,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:59,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:01,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:01,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:01,343 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:01,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 12:21:01,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:01,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:03,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:03,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-02 12:21:03,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-02 12:21:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-02 12:21:03,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:03,386 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-02 12:21:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:04,381 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 12:21:04,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 12:21:04,381 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-02 12:21:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:04,382 INFO L225 Difference]: With dead ends: 127 [2018-10-02 12:21:04,382 INFO L226 Difference]: Without dead ends: 126 [2018-10-02 12:21:04,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.2s impTime [2018-10-02 12:21:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-02 12:21:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-02 12:21:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-02 12:21:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-02 12:21:04,387 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-02 12:21:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-02 12:21:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-02 12:21:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-02 12:21:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-02 12:21:04,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:04,388 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-02 12:21:04,388 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:04,388 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-02 12:21:04,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:04,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:04,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:04,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:04,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:05,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:05,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:05,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:05,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:08,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:08,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-02 12:21:08,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-02 12:21:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-02 12:21:08,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:08,197 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-02 12:21:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:09,128 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 12:21:09,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 12:21:09,129 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-02 12:21:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:09,129 INFO L225 Difference]: With dead ends: 129 [2018-10-02 12:21:09,129 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 12:21:09,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.2s impTime [2018-10-02 12:21:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 12:21:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-02 12:21:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-02 12:21:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-02 12:21:09,133 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-02 12:21:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:09,134 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-02 12:21:09,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-02 12:21:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-02 12:21:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-02 12:21:09,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:09,144 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-02 12:21:09,144 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:09,146 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-02 12:21:09,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:09,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:09,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:09,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:09,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:11,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:11,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:11,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:11,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:11,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:11,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:13,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:13,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-02 12:21:13,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-02 12:21:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-02 12:21:13,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:13,574 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-02 12:21:14,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:14,495 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 12:21:14,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 12:21:14,495 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-02 12:21:14,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:14,496 INFO L225 Difference]: With dead ends: 131 [2018-10-02 12:21:14,496 INFO L226 Difference]: Without dead ends: 130 [2018-10-02 12:21:14,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.7s impTime [2018-10-02 12:21:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-02 12:21:14,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-02 12:21:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-02 12:21:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-02 12:21:14,499 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-02 12:21:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:14,499 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-02 12:21:14,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-02 12:21:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-02 12:21:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-02 12:21:14,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:14,500 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-02 12:21:14,500 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:14,500 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-02 12:21:14,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:14,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:14,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:14,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:14,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:16,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:16,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:16,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:16,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 12:21:16,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:16,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:18,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:18,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-02 12:21:18,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-02 12:21:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-02 12:21:18,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:18,967 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-02 12:21:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:19,879 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 12:21:19,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 12:21:19,879 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-02 12:21:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:19,880 INFO L225 Difference]: With dead ends: 133 [2018-10-02 12:21:19,880 INFO L226 Difference]: Without dead ends: 132 [2018-10-02 12:21:19,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.8s impTime [2018-10-02 12:21:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-02 12:21:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-02 12:21:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-02 12:21:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-02 12:21:19,884 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-02 12:21:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:19,885 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-02 12:21:19,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-02 12:21:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-02 12:21:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-02 12:21:19,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:19,886 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-02 12:21:19,886 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:19,886 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-02 12:21:19,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:19,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:19,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:19,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:19,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:22,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:22,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:22,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:22,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:22,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:22,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:24,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:24,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-02 12:21:24,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-02 12:21:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-02 12:21:24,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:24,496 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-02 12:21:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:25,455 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 12:21:25,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 12:21:25,455 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-02 12:21:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:25,456 INFO L225 Difference]: With dead ends: 135 [2018-10-02 12:21:25,456 INFO L226 Difference]: Without dead ends: 134 [2018-10-02 12:21:25,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.9s impTime [2018-10-02 12:21:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-02 12:21:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-02 12:21:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-02 12:21:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-02 12:21:25,460 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-02 12:21:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:25,460 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-02 12:21:25,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-02 12:21:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-02 12:21:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-02 12:21:25,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:25,461 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-02 12:21:25,461 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:25,461 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:25,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-02 12:21:25,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:25,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:25,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:25,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:25,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:27,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:27,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:27,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:27,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 12:21:27,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:27,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:30,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:30,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-02 12:21:30,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-02 12:21:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-02 12:21:30,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:30,250 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-02 12:21:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:31,280 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 12:21:31,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 12:21:31,281 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-02 12:21:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:31,281 INFO L225 Difference]: With dead ends: 137 [2018-10-02 12:21:31,281 INFO L226 Difference]: Without dead ends: 136 [2018-10-02 12:21:31,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 3.9s impTime [2018-10-02 12:21:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-02 12:21:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-02 12:21:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 12:21:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-02 12:21:31,286 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-02 12:21:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:31,286 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-02 12:21:31,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-02 12:21:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-02 12:21:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 12:21:31,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:31,287 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-02 12:21:31,287 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:31,287 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:31,287 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-02 12:21:31,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:31,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:31,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:31,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:31,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:33,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:33,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:33,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:33,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 12:21:33,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:33,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:36,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:36,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-02 12:21:36,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-02 12:21:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-02 12:21:36,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:36,554 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-02 12:21:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:37,859 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 12:21:37,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 12:21:37,859 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-02 12:21:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:37,860 INFO L225 Difference]: With dead ends: 139 [2018-10-02 12:21:37,860 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 12:21:37,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.5s impTime [2018-10-02 12:21:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 12:21:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-02 12:21:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-02 12:21:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-02 12:21:37,865 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-02 12:21:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:37,865 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-02 12:21:37,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-02 12:21:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-02 12:21:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-02 12:21:37,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:37,866 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-02 12:21:37,866 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:37,866 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:37,866 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-02 12:21:37,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:37,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:37,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:37,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:37,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:39,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:39,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:39,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:39,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:41,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:41,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-02 12:21:41,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-02 12:21:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-02 12:21:41,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:41,680 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-02 12:21:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:42,838 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 12:21:42,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 12:21:42,838 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-02 12:21:42,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:42,839 INFO L225 Difference]: With dead ends: 141 [2018-10-02 12:21:42,839 INFO L226 Difference]: Without dead ends: 140 [2018-10-02 12:21:42,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.1s impTime [2018-10-02 12:21:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-02 12:21:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-02 12:21:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-02 12:21:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-02 12:21:42,843 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-02 12:21:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:42,843 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-02 12:21:42,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-02 12:21:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-02 12:21:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-02 12:21:42,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:42,844 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-02 12:21:42,844 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:42,844 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-02 12:21:42,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:42,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:42,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:42,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:42,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:45,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:45,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:45,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:45,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:45,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:45,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:47,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:47,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-02 12:21:47,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-02 12:21:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-02 12:21:47,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:47,610 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-02 12:21:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:48,653 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 12:21:48,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 12:21:48,654 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-02 12:21:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:48,654 INFO L225 Difference]: With dead ends: 143 [2018-10-02 12:21:48,654 INFO L226 Difference]: Without dead ends: 142 [2018-10-02 12:21:48,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.1s impTime [2018-10-02 12:21:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-02 12:21:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-02 12:21:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-02 12:21:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-02 12:21:48,658 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-02 12:21:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:48,658 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-02 12:21:48,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-02 12:21:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-02 12:21:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-02 12:21:48,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:48,659 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-02 12:21:48,659 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:48,659 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-02 12:21:48,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:48,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:48,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:48,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:48,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:50,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:50,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:50,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:50,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 12:21:50,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:50,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:53,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:53,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-02 12:21:53,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-02 12:21:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-02 12:21:53,811 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:53,811 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-02 12:21:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:55,013 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 12:21:55,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 12:21:55,013 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-02 12:21:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:55,014 INFO L225 Difference]: With dead ends: 145 [2018-10-02 12:21:55,014 INFO L226 Difference]: Without dead ends: 144 [2018-10-02 12:21:55,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time 4.4s impTime [2018-10-02 12:21:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-02 12:21:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-02 12:21:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-02 12:21:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-02 12:21:55,018 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-02 12:21:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:55,019 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-02 12:21:55,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-02 12:21:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-02 12:21:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-02 12:21:55,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:55,019 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-02 12:21:55,020 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:55,020 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-02 12:21:55,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:55,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:55,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:55,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:55,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:56,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:56,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:56,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:56,775 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:56,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:56,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:59,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:59,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-02 12:21:59,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-02 12:21:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-02 12:21:59,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:59,018 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-02 12:22:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:00,041 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 12:22:00,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 12:22:00,041 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-02 12:22:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:00,042 INFO L225 Difference]: With dead ends: 147 [2018-10-02 12:22:00,042 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 12:22:00,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime [2018-10-02 12:22:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 12:22:00,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-02 12:22:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-02 12:22:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-02 12:22:00,046 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-02 12:22:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:00,047 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-02 12:22:00,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-02 12:22:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-02 12:22:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-02 12:22:00,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:00,048 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-02 12:22:00,048 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:00,048 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-02 12:22:00,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:00,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:00,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:01,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:01,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:01,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:22:02,021 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 12:22:02,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:02,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:05,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:05,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-02 12:22:05,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-02 12:22:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-02 12:22:05,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:05,313 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-02 12:22:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:06,470 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 12:22:06,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 12:22:06,470 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-02 12:22:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:06,471 INFO L225 Difference]: With dead ends: 149 [2018-10-02 12:22:06,471 INFO L226 Difference]: Without dead ends: 148 [2018-10-02 12:22:06,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.2s impTime [2018-10-02 12:22:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-02 12:22:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-02 12:22:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-02 12:22:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-02 12:22:06,476 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-02 12:22:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:06,476 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-02 12:22:06,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-02 12:22:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-02 12:22:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-02 12:22:06,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:06,477 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-02 12:22:06,478 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:06,478 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-02 12:22:06,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:06,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:06,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:06,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:06,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:08,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:08,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:08,735 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:22:08,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 12:22:08,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:08,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:10,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:10,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-02 12:22:10,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-02 12:22:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-02 12:22:10,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:10,835 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-02 12:22:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:11,867 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 12:22:11,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 12:22:11,868 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-02 12:22:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:11,869 INFO L225 Difference]: With dead ends: 151 [2018-10-02 12:22:11,869 INFO L226 Difference]: Without dead ends: 150 [2018-10-02 12:22:11,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.5s impTime [2018-10-02 12:22:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-02 12:22:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-02 12:22:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-02 12:22:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-02 12:22:11,874 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-02 12:22:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:11,874 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-02 12:22:11,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-02 12:22:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-02 12:22:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-02 12:22:11,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:11,875 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-02 12:22:11,876 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:11,876 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:11,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-02 12:22:11,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:11,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:11,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:11,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:11,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:15,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:15,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:15,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:15,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:18,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:18,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-02 12:22:18,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-02 12:22:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-02 12:22:18,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:18,407 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-02 12:22:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:19,675 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 12:22:19,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 12:22:19,676 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-02 12:22:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:19,676 INFO L225 Difference]: With dead ends: 153 [2018-10-02 12:22:19,676 INFO L226 Difference]: Without dead ends: 152 [2018-10-02 12:22:19,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s Time 5.8s impTime [2018-10-02 12:22:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-02 12:22:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-02 12:22:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-02 12:22:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-02 12:22:19,681 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-02 12:22:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:19,682 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-02 12:22:19,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-02 12:22:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-02 12:22:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-02 12:22:19,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:19,683 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-02 12:22:19,683 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:19,683 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-02 12:22:19,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:19,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:19,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:19,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:19,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:22,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:22,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:22,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:22:22,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:22:22,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:22,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:25,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:25,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-02 12:22:25,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-02 12:22:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-02 12:22:25,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:25,296 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-02 12:22:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:26,356 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 12:22:26,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 12:22:26,356 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-02 12:22:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:26,357 INFO L225 Difference]: With dead ends: 155 [2018-10-02 12:22:26,357 INFO L226 Difference]: Without dead ends: 154 [2018-10-02 12:22:26,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time 4.9s impTime [2018-10-02 12:22:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-02 12:22:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-02 12:22:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-02 12:22:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-02 12:22:26,361 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-02 12:22:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:26,361 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-02 12:22:26,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-02 12:22:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-02 12:22:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-02 12:22:26,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:26,362 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-02 12:22:26,362 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:26,362 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-02 12:22:26,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:26,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:26,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:28,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:28,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:28,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:22:28,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 12:22:28,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:28,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:31,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:31,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-02 12:22:31,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-02 12:22:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-02 12:22:31,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:31,174 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-02 12:22:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:32,111 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 12:22:32,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 12:22:32,112 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-02 12:22:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:32,112 INFO L225 Difference]: With dead ends: 157 [2018-10-02 12:22:32,113 INFO L226 Difference]: Without dead ends: 156 [2018-10-02 12:22:32,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.1s impTime [2018-10-02 12:22:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-02 12:22:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-02 12:22:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-02 12:22:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-02 12:22:32,117 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-02 12:22:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:32,117 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-02 12:22:32,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-02 12:22:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-02 12:22:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-02 12:22:32,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:32,118 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-02 12:22:32,118 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:32,118 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-02 12:22:32,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:32,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:32,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:34,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:34,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:34,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:22:34,621 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:22:34,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:34,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:37,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:37,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-02 12:22:37,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-02 12:22:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-02 12:22:37,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:37,152 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-02 12:22:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:38,219 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 12:22:38,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 12:22:38,219 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-02 12:22:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:38,220 INFO L225 Difference]: With dead ends: 159 [2018-10-02 12:22:38,220 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 12:22:38,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.3s impTime [2018-10-02 12:22:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 12:22:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-02 12:22:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-02 12:22:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-02 12:22:38,224 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-02 12:22:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:38,224 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-02 12:22:38,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-02 12:22:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-02 12:22:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-02 12:22:38,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:38,225 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-02 12:22:38,225 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:38,225 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-02 12:22:38,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:38,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:38,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:38,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:38,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:41,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:41,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:41,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:22:41,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 12:22:41,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:41,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 12:22:43,029 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 12:22:43,230 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:22:43,230 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:22:43,236 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:22:43,236 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:22:43 BoogieIcfgContainer [2018-10-02 12:22:43,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:22:43,237 INFO L168 Benchmark]: Toolchain (without parser) took 240099.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -131.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 382.3 MB). Peak memory consumption was 250.7 MB. Max. memory is 7.1 GB. [2018-10-02 12:22:43,239 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:22:43,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:22:43,241 INFO L168 Benchmark]: Boogie Preprocessor took 25.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:22:43,241 INFO L168 Benchmark]: RCFGBuilder took 291.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:22:43,242 INFO L168 Benchmark]: TraceAbstraction took 239731.73 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -131.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 361.2 MB). Peak memory consumption was 229.6 MB. Max. memory is 7.1 GB. [2018-10-02 12:22:43,245 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.71 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 291.01 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 239731.73 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -131.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 361.2 MB). Peak memory consumption was 229.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 158 with TraceHistMax 78, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 239.6s OverallTime, 78 OverallIterations, 78 TraceHistogramMax, 49.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 156 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 12304 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9007 GetRequests, 3002 SyntacticMatches, 0 SemanticMatches, 6005 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 172.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 77 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 177.2s InterpolantComputationTime, 12163 NumberOfCodeBlocks, 12163 NumberOfCodeBlocksAsserted, 1610 NumberOfCheckSat, 12010 ConstructedInterpolants, 0 QuantifiedInterpolants, 7447412 SizeOfPredicates, 0 NumberOfNonLiveVariables, 12312 ConjunctsInSsa, 3154 ConjunctsInUnsatCore, 153 InterpolantComputations, 1 PerfectInterpolantSequences, 0/304304 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-22-43-264.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-22-43-264.csv Completed graceful shutdown