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/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:52:21,884 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:52:21,886 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:52:21,904 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:52:21,905 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:52:21,907 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:52:21,908 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:52:21,910 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:52:21,912 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:52:21,913 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:52:21,915 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:52:21,916 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:52:21,917 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:52:21,918 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:52:21,926 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:52:21,927 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:52:21,928 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:52:21,935 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:52:21,937 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:52:21,942 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:52:21,943 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:52:21,944 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:52:21,950 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:52:21,966 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:52:21,994 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:52:21,995 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:52:21,996 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:52:21,996 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:52:21,997 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:52:21,997 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:52:21,997 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:52:21,998 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:52:21,998 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:52:21,998 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:52:21,998 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:52:21,998 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:52:21,999 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:52:21,999 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:52:21,999 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:52:21,999 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:52:21,999 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:52:22,000 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:52:22,000 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:52:22,000 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:52:22,000 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:52:22,001 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:52:22,001 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:22,001 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:52:22,001 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:52:22,001 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:52:22,002 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:52:22,002 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:52:22,002 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:52:22,002 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:52:22,003 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:52:22,060 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:52:22,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:52:22,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:52:22,083 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:52:22,084 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:52:22,085 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-09-30 20:52:22,085 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-09-30 20:52:22,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:52:22,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:52:22,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:22,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:52:22,142 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:52:22,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,184 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:52:22,184 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:52:22,185 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:52:22,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:22,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:52:22,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:52:22,188 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:52:22,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... [2018-09-30 20:52:22,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:52:22,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:52:22,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:52:22,215 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:52:22,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:22,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:52:22,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:52:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:52:22,424 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:52:22,425 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:22 BoogieIcfgContainer [2018-09-30 20:52:22,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:52:22,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:52:22,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:52:22,429 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:52:22,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:22" (1/2) ... [2018-09-30 20:52:22,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf33b1 and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:52:22, skipping insertion in model container [2018-09-30 20:52:22,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:22" (2/2) ... [2018-09-30 20:52:22,433 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-09-30 20:52:22,443 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:52:22,451 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:52:22,502 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:52:22,503 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:52:22,503 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:52:22,504 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:52:22,504 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:52:22,504 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:52:22,504 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:52:22,504 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:52:22,505 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:52:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:52:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:52:22,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:22,527 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:52:22,529 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:22,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-30 20:52:22,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:22,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:22,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:22,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:22,694 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:52:22,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:52:22,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:52:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:52:22,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:22,712 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:52:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:22,910 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 20:52:22,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:52:22,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:52:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:22,938 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:52:22,938 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:52:22,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:52:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:52:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:52:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:52:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:52:22,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:52:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:22,980 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:52:22,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:52:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:52:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:52:22,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:22,980 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:52:22,981 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:22,981 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-30 20:52:22,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:22,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:22,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:22,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:23,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:23,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:23,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:23,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:52:23,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:52:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:52:23,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:23,215 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 20:52:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:23,419 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 20:52:23,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:52:23,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 20:52:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:23,421 INFO L225 Difference]: With dead ends: 8 [2018-09-30 20:52:23,421 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:52:23,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:52:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:52:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:52:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:52:23,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:52:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:23,424 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:52:23,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:52:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:52:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:52:23,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:23,425 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:52:23,426 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:23,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-30 20:52:23,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:23,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:23,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:23,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:23,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:23,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:23,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:23,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:23,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:23,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:23,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:52:23,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:52:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:52:23,595 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:23,595 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 20:52:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:23,747 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:52:23,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:52:23,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:52:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:23,748 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:52:23,748 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:52:23,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:52:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:52:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:52:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:52:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:52:23,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:52:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:23,752 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:52:23,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:52:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:52:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:52:23,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:23,753 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 20:52:23,753 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:23,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-30 20:52:23,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:23,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:23,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:23,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:23,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:23,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:23,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:23,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:52:23,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:23,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:24,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:52:24,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:52:24,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:52:24,060 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:24,060 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 20:52:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:24,171 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:52:24,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:52:24,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 20:52:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:24,172 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:52:24,173 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:52:24,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:52:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:52:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:52:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:52:24,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:52:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:24,178 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:52:24,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:52:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:52:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:52:24,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:24,179 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 20:52:24,179 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:24,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-30 20:52:24,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:24,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:24,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:24,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:24,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:24,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:24,304 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:24,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:24,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:24,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:52:24,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:52:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:52:24,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:24,436 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 20:52:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:24,504 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:52:24,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:52:24,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:52:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:24,505 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:52:24,505 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:52:24,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:52:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:52:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:52:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:52:24,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:52:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:52:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:52:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:52:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:52:24,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:24,510 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 20:52:24,510 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:24,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-30 20:52:24,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:24,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:24,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:24,615 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:24,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:52:24,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:24,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:24,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:52:24,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:52:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:52:24,684 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:24,684 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 20:52:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:25,059 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:52:25,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:52:25,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 20:52:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:25,060 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:52:25,060 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:52:25,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:52:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:52:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:52:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:52:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:52:25,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:52:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:25,064 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:52:25,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:52:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:52:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:52:25,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:25,065 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 20:52:25,065 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:25,065 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:25,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-30 20:52:25,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:25,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:25,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:25,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:25,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:25,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:25,256 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:25,276 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:52:25,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:25,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:25,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:25,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:52:25,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:52:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:52:25,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:25,357 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 20:52:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:25,486 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:52:25,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:52:25,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 20:52:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:25,488 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:52:25,488 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:52:25,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:52:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:52:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:52:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:52:25,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:52:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:25,493 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:52:25,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:52:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:52:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:52:25,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:25,494 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 20:52:25,494 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:25,494 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-30 20:52:25,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:25,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:25,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:25,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:25,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:25,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:25,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:25,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:25,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:25,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:52:25,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:52:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:52:25,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:25,750 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 20:52:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:25,831 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:52:25,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:52:25,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 20:52:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:25,833 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:52:25,833 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:52:25,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:52:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:52:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:52:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:52:25,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:52:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:25,836 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:52:25,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:52:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:52:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:52:25,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:25,837 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 20:52:25,837 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:25,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-30 20:52:25,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:25,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:25,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:25,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:25,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:25,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:25,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:25,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:26,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:52:26,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:52:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:52:26,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:26,074 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 20:52:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:26,366 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:52:26,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:52:26,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 20:52:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:26,367 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:52:26,367 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:52:26,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:52:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:52:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:52:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:52:26,370 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:52:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:26,371 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:52:26,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:52:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:52:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:52:26,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:26,372 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 20:52:26,372 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:26,372 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-30 20:52:26,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:26,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:26,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:26,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:26,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:26,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:26,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:52:26,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:26,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:26,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:52:26,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:52:26,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:52:26,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:26,598 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 20:52:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:26,678 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:52:26,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:52:26,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 20:52:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:26,679 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:52:26,680 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:52:26,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:52:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:52:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:52:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:52:26,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:52:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:26,684 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:52:26,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:52:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:52:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:52:26,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:26,685 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 20:52:26,685 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:26,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-30 20:52:26,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:26,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:26,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:26,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:26,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:26,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:26,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:26,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:26,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:26,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:52:26,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:52:26,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:52:26,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:26,886 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 20:52:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:26,974 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:52:26,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:52:26,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:52:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:26,974 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:52:26,975 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:52:26,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:52:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:52:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:52:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:52:26,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:52:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:26,978 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:52:26,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:52:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:52:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:52:26,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:26,979 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 20:52:26,980 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:26,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-30 20:52:26,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:26,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:26,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:26,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:27,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:27,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:27,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:27,179 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:52:27,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:27,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:27,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:27,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:52:27,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:52:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:52:27,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:27,305 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 20:52:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:27,439 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:52:27,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:52:27,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:52:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:27,441 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:52:27,441 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:52:27,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:52:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:52:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:52:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:52:27,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:52:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:27,446 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:52:27,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:52:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:52:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:52:27,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:27,447 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 20:52:27,447 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:27,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-30 20:52:27,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:27,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:27,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:27,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:27,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:27,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:27,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:27,576 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:27,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:52:27,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:27,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:27,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:27,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:52:27,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:52:27,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:52:27,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:27,679 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 20:52:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:27,782 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:52:27,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:52:27,782 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 20:52:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:27,783 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:52:27,784 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:52:27,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:52:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:52:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:52:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:52:27,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:52:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:27,789 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:52:27,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:52:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:52:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:52:27,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:27,790 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 20:52:27,790 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:27,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-30 20:52:27,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:27,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:27,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:27,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:27,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:27,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:27,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:27,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:27,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:28,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:52:28,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:52:28,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:52:28,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:28,064 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 20:52:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:28,313 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:52:28,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:52:28,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 20:52:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:28,318 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:52:28,318 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:52:28,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:52:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:52:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:52:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:52:28,322 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:52:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:28,322 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:52:28,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:52:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:52:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:52:28,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:28,323 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 20:52:28,323 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:28,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-30 20:52:28,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:28,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:28,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:28,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:28,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:28,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:28,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:28,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:28,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:28,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:28,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:52:28,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:52:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:52:28,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:28,602 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 20:52:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:28,771 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:52:28,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:52:28,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 20:52:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:28,773 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:52:28,773 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:52:28,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:52:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:52:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:52:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:52:28,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:52:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:28,777 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:52:28,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:52:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:52:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:52:28,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:28,778 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 20:52:28,778 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:28,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-30 20:52:28,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:28,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:28,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:28,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:28,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:28,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:28,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:29,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:52:29,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:29,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:29,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:29,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:52:29,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:52:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:52:29,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:29,108 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 20:52:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:29,265 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:52:29,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:52:29,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 20:52:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:29,266 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:52:29,266 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:52:29,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:52:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:52:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:52:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:52:29,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:52:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:29,270 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:52:29,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:52:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:52:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:52:29,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:29,271 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 20:52:29,271 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:29,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-30 20:52:29,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:29,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:29,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:29,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:29,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:29,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:29,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:29,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:29,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:29,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:29,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:29,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:52:29,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:52:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:52:29,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:29,736 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 20:52:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:29,904 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:52:29,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:52:29,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 20:52:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:29,905 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:52:29,905 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:52:29,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:52:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:52:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:52:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:52:29,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:52:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:29,909 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:52:29,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:52:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:52:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:52:29,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:29,910 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 20:52:29,910 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:29,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:29,911 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-30 20:52:29,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:29,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:30,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:30,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:30,078 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:30,149 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:52:30,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:30,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:30,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:30,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:52:30,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:52:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:52:30,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:30,503 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 20:52:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:30,622 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:52:30,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:52:30,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 20:52:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:30,624 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:52:30,624 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:52:30,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:52:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:52:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:52:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:52:30,628 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:52:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:30,628 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:52:30,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:52:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:52:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:52:30,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:30,629 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 20:52:30,630 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:30,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-30 20:52:30,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:30,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:30,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:30,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:30,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:30,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:30,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:30,768 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:30,795 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:52:30,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:30,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:30,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:30,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:52:30,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:52:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:52:30,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:30,942 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 20:52:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:31,069 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:52:31,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:52:31,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 20:52:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:31,070 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:52:31,070 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:52:31,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:52:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:52:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:52:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:52:31,075 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:52:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:31,075 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:52:31,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:52:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:52:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:52:31,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:31,076 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 20:52:31,076 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:31,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-30 20:52:31,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:31,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:31,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:31,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:31,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:31,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:31,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:31,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:31,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:31,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:52:31,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:52:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:52:31,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:31,443 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 20:52:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:31,684 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:52:31,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:52:31,684 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 20:52:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:31,685 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:52:31,685 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:52:31,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:52:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:52:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:52:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:52:31,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:52:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:31,689 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:52:31,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:52:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:52:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:52:31,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:31,690 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 20:52:31,691 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:31,691 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-30 20:52:31,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:31,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:31,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:31,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:32,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:32,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:32,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:32,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:32,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:32,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:32,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:32,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:52:32,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:52:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:52:32,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:32,743 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 20:52:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:32,867 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:52:32,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:52:32,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 20:52:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:32,870 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:52:32,870 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:52:32,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:52:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:52:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:52:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:52:32,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:52:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:32,873 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:52:32,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:52:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:52:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:52:32,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:32,874 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 20:52:32,874 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:32,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-30 20:52:32,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:32,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:32,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:32,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:32,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:33,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:33,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:33,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:33,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:52:33,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:33,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:33,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:33,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:52:33,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:52:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:52:33,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:33,375 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 20:52:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:33,743 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:52:33,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:52:33,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 20:52:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:33,746 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:52:33,746 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:52:33,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:52:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:52:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:52:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:52:33,750 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:52:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:33,750 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:52:33,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:52:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:52:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:52:33,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:33,751 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 20:52:33,752 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:33,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-30 20:52:33,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:33,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:33,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:33,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:33,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:33,932 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:33,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:33,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:34,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:52:34,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:52:34,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:52:34,160 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:34,160 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 20:52:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:34,369 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:52:34,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:52:34,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 20:52:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:34,370 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:52:34,370 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:52:34,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:52:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:52:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:52:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:52:34,375 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:52:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:34,375 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:52:34,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:52:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:52:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:52:34,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:34,376 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 20:52:34,376 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:34,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-30 20:52:34,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:34,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:34,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:34,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:34,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:34,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:34,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:34,574 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:52:34,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:34,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:34,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:52:34,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:52:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:52:34,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:34,649 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 20:52:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:34,814 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:52:34,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:52:34,816 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 20:52:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:34,817 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:52:34,817 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:52:34,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:52:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:52:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:52:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:52:34,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:52:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:34,822 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:52:34,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:52:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:52:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:52:34,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:34,823 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 20:52:34,823 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:34,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-30 20:52:34,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:34,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:34,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:34,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:34,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:35,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:35,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:35,042 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:35,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:52:35,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:35,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:35,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:35,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:52:35,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:52:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:52:35,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:35,174 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 20:52:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:35,356 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:52:35,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:52:35,357 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 20:52:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:35,358 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:52:35,358 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:52:35,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:52:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:52:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:52:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:52:35,367 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:52:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:35,367 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:52:35,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:52:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:52:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:52:35,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:35,368 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 20:52:35,368 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:35,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-30 20:52:35,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:35,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:35,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:35,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:35,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:36,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:36,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:36,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:36,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:52:36,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:52:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:52:36,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:36,153 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 20:52:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:36,310 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:52:36,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:52:36,312 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 20:52:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:36,313 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:52:36,313 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:52:36,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:52:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:52:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:52:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:52:36,316 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:52:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:36,316 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:52:36,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:52:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:52:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:52:36,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:36,317 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 20:52:36,318 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:36,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-30 20:52:36,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:36,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:36,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:36,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:36,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:36,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:36,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:36,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:36,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:36,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:52:36,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:52:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:52:36,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:36,611 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 20:52:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:36,804 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:52:36,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:52:36,804 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 20:52:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:36,805 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:52:36,805 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:52:36,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:52:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:52:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:52:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:52:36,810 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:52:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:36,810 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:52:36,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:52:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:52:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:52:36,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:36,811 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 20:52:36,811 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:36,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-30 20:52:36,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:36,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:36,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:36,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:37,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:37,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:37,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:52:37,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:37,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:37,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:52:37,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:52:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:52:37,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:37,205 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 20:52:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:37,429 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:52:37,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:52:37,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 20:52:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:37,430 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:52:37,430 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:52:37,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:52:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:52:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:52:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:52:37,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:52:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:37,434 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:52:37,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:52:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:52:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:52:37,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:37,434 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 20:52:37,435 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:37,435 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:37,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-30 20:52:37,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:37,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:37,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:37,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:37,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:37,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:37,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:37,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:37,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:37,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:52:37,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:52:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:52:37,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:37,867 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 20:52:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:38,037 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:52:38,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:52:38,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 20:52:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:38,038 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:52:38,039 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:52:38,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:52:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:52:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:52:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:52:38,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:52:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:38,044 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:52:38,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:52:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:52:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:52:38,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:38,045 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 20:52:38,045 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:38,045 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-30 20:52:38,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:38,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:38,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:38,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:38,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:38,246 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:38,268 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:52:38,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:38,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:38,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:52:38,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:52:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:52:38,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:38,367 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 20:52:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:38,566 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:52:38,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:52:38,566 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 20:52:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:38,567 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:52:38,567 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:52:38,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:52:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:52:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:52:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:52:38,572 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:52:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:38,572 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:52:38,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:52:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:52:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:52:38,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:38,573 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 20:52:38,573 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:38,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-30 20:52:38,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:38,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:38,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:38,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:38,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:38,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:38,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:52:38,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:38,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:39,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:52:39,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:52:39,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:52:39,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:39,040 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 20:52:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:39,223 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:52:39,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:52:39,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 20:52:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:39,225 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:52:39,225 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:52:39,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:52:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:52:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:52:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:52:39,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:52:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:39,227 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:52:39,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:52:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:52:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:52:39,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:39,228 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 20:52:39,229 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:39,229 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-30 20:52:39,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:39,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:39,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:39,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:39,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:39,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:39,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:39,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:39,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:52:39,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:52:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:52:39,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:39,562 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 20:52:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:39,994 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:52:39,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:52:39,995 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 20:52:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:39,996 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:52:39,996 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:52:39,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:52:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:52:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:52:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:52:40,000 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:52:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:40,001 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:52:40,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:52:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:52:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:52:40,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:40,002 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 20:52:40,002 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:40,002 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-30 20:52:40,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:40,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:40,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:40,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:40,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:40,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:40,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:40,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:40,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:40,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:40,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:52:40,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:52:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:52:40,374 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:40,374 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 20:52:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:40,523 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:52:40,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:52:40,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 20:52:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:40,525 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:52:40,525 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:52:40,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:52:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:52:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:52:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:52:40,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:52:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:40,529 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:52:40,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:52:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:52:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:52:40,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:40,530 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 20:52:40,530 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:40,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-30 20:52:40,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:40,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:40,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:40,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:40,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:40,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:40,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:40,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:52:40,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:40,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:40,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:52:40,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:52:40,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:52:40,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:40,949 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 20:52:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:41,170 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:52:41,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:52:41,170 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 20:52:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:41,171 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:52:41,171 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:52:41,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:52:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:52:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:52:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:52:41,174 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:52:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:41,175 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:52:41,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:52:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:52:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:52:41,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:41,175 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 20:52:41,175 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:41,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-30 20:52:41,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:41,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:41,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:41,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:41,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:41,371 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:41,394 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:41,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:41,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:41,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:52:41,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:52:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:52:41,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:41,589 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 20:52:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:41,741 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:52:41,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:52:41,741 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 20:52:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:41,742 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:52:41,742 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:52:41,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:52:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:52:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:52:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:52:41,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:52:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:41,746 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:52:41,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:52:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:52:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:52:41,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:41,747 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 20:52:41,747 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:41,747 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-30 20:52:41,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:41,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:41,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:41,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:41,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:41,940 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:41,967 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:52:41,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:41,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:42,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:42,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:52:42,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:52:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:52:42,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:42,098 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 20:52:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:42,324 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 20:52:42,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:52:42,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 20:52:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:42,325 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:52:42,325 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:52:42,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:52:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:52:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:52:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:52:42,328 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:52:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:42,328 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:52:42,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:52:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:52:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:52:42,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:42,329 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 20:52:42,329 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:42,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-30 20:52:42,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:42,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:42,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:42,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:42,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:42,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:42,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:42,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:42,891 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:52:42,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:42,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:43,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:43,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:52:43,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:52:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:52:43,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:43,914 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 20:52:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:44,309 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:52:44,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:52:44,310 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 20:52:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:44,310 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:52:44,310 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:52:44,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:52:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:52:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:52:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:52:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:52:44,312 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 20:52:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:44,312 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:52:44,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:52:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:52:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:52:44,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:44,313 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 20:52:44,313 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:44,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-30 20:52:44,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:44,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:44,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:44,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:44,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:44,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:44,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:44,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:44,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:44,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:44,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:52:44,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:52:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:52:44,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:44,689 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 20:52:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:44,931 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 20:52:44,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:52:44,932 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 20:52:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:44,932 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:52:44,932 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:52:44,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:52:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:52:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:52:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:52:44,934 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 20:52:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:44,935 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:52:44,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:52:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:52:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:52:44,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:44,935 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 20:52:44,936 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:44,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-30 20:52:44,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:44,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:44,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:44,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:44,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:45,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:45,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:45,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:45,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:45,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:45,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:52:45,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:52:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:52:45,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:45,289 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 20:52:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:45,452 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:52:45,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:52:45,452 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 20:52:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:45,453 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:52:45,453 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:52:45,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:52:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:52:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:52:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:52:45,456 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 20:52:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:45,456 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:52:45,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:52:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:52:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:52:45,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:45,457 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 20:52:45,457 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:45,457 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-30 20:52:45,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:45,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:45,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:45,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:45,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:45,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:45,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:45,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:52:45,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:45,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:45,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:52:45,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:52:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:52:45,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:45,927 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 20:52:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:46,202 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 20:52:46,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:52:46,202 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 20:52:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:46,203 INFO L225 Difference]: With dead ends: 46 [2018-09-30 20:52:46,203 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:52:46,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:52:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:52:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:52:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:52:46,205 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 20:52:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:46,206 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:52:46,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:52:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:52:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:52:46,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:46,206 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 20:52:46,206 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:46,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:46,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-30 20:52:46,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:46,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:46,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:46,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:46,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:46,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:46,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:46,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:46,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:46,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:46,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:46,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:46,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:52:46,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:52:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:52:46,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:46,705 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 20:52:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:46,914 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:52:46,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:52:46,915 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 20:52:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:46,916 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:52:46,916 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:52:46,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:52:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:52:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:52:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:52:46,919 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 20:52:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:46,919 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:52:46,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:52:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:52:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:52:46,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:46,920 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 20:52:46,921 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:46,921 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-30 20:52:46,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:46,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:46,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:46,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:46,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:47,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:47,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:47,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:47,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:52:47,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:47,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:47,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:47,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:52:47,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:52:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:52:47,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:47,720 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 20:52:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:48,106 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 20:52:48,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:52:48,107 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 20:52:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:48,107 INFO L225 Difference]: With dead ends: 48 [2018-09-30 20:52:48,107 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:52:48,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:52:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:52:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:52:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:52:48,109 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 20:52:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:48,110 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:52:48,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:52:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:52:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:52:48,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:48,110 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 20:52:48,111 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:48,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-30 20:52:48,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:48,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:48,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:48,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:48,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:48,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:48,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:48,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:52:48,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:48,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:48,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:48,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:52:48,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:52:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:52:48,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:48,601 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 20:52:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:48,846 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:52:48,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:52:48,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 20:52:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:48,847 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:52:48,847 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:52:48,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:52:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:52:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:52:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:52:48,850 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 20:52:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:48,850 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:52:48,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:52:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:52:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:52:48,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:48,851 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 20:52:48,851 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:48,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-30 20:52:48,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:48,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:48,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:48,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:49,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:49,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:49,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:52:49,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:52:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:52:49,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:49,223 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 20:52:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:49,503 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 20:52:49,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:52:49,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 20:52:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:49,504 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:52:49,504 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:52:49,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:52:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:52:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:52:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:52:49,507 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 20:52:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:49,508 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:52:49,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:52:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:52:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:52:49,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:49,508 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 20:52:49,508 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:49,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-30 20:52:49,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:49,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:49,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:49,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:49,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:49,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:49,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:49,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:49,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:49,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:52:49,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:52:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:52:49,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:49,884 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 20:52:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:50,137 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:52:50,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:52:50,138 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 20:52:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:50,139 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:52:50,139 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:52:50,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:52:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:52:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:52:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:52:50,142 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 20:52:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:50,142 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:52:50,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:52:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:52:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:52:50,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:50,143 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 20:52:50,143 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:50,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-30 20:52:50,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:50,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:50,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:50,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:50,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:50,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:52:50,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:50,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:50,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:52:50,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:52:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:52:50,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:50,566 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 20:52:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:50,961 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 20:52:50,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:52:50,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 20:52:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:50,962 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:52:50,962 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:52:50,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:52:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:52:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:52:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:52:50,964 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 20:52:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:50,964 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:52:50,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:52:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:52:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:52:50,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:50,965 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 20:52:50,965 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:50,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:50,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-30 20:52:50,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:50,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:50,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:50,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:51,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:51,332 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:51,361 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:51,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:51,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:51,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:52:51,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:52:51,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:52:51,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:51,482 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 20:52:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:51,775 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:52:51,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:52:51,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 20:52:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:51,776 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:52:51,776 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:52:51,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:52:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:52:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:52:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:52:51,779 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 20:52:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:51,779 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:52:51,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:52:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:52:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:52:51,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:51,780 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 20:52:51,780 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:51,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-30 20:52:51,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:51,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:51,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:51,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:52,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:52,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:52,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:52,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:52:52,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:52,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:52,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:52,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:52:52,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:52:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:52:52,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:52,535 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 20:52:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:52,903 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 20:52:52,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:52:52,908 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 20:52:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:52,908 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:52:52,909 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:52:52,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:52:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:52:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:52:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:52:52,914 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 20:52:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:52,914 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:52:52,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:52:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:52:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:52:52,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:52,915 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 20:52:52,915 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:52,915 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:52,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-30 20:52:52,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:52,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:52,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:52,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:53,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:53,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:53,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:53,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:52:53,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:53,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:53,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:53,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:52:53,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:52:53,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:52:53,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:53,430 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 20:52:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:53,637 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:52:53,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:52:53,637 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 20:52:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:53,638 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:52:53,638 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:52:53,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:52:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:52:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:52:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:52:53,641 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 20:52:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:53,642 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:52:53,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:52:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:52:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:52:53,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:53,643 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 20:52:53,643 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:53,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-30 20:52:53,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:53,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:53,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:53,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:53,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:54,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:54,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:54,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:54,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:54,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:54,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:52:54,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:52:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:52:54,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:54,689 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 20:52:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:54,886 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 20:52:54,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:52:54,887 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 20:52:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:54,887 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:52:54,887 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:52:54,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:52:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:52:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:52:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:52:54,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 20:52:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:54,891 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:52:54,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:52:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:52:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:52:54,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:54,891 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 20:52:54,891 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:54,892 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-30 20:52:54,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:54,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:54,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:54,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:55,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:55,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:55,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:55,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:55,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:55,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:52:55,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:52:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:52:55,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:55,531 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 20:52:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:55,766 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:52:55,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:52:55,766 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 20:52:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:55,767 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:52:55,767 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:52:55,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:52:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:52:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:52:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:52:55,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 20:52:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:55,770 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:52:55,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:52:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:52:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:52:55,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:55,771 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 20:52:55,771 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:55,772 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-30 20:52:55,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:55,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:55,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:55,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:55,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:56,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:56,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:56,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:56,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 20:52:56,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:56,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:56,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:56,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:52:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:52:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:52:56,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:56,415 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 20:52:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:56,681 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 20:52:56,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:52:56,682 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 20:52:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:56,682 INFO L225 Difference]: With dead ends: 58 [2018-09-30 20:52:56,682 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:52:56,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:52:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:52:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:52:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:52:56,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 20:52:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:56,685 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:52:56,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:52:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:52:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:52:56,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:56,686 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 20:52:56,686 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:56,687 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-30 20:52:56,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:56,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:56,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:56,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:57,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:57,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:57,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:57,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:57,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:57,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:57,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:57,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:52:57,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:52:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:52:57,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:57,266 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 20:52:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:57,597 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:52:57,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:52:57,597 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 20:52:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:57,598 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:52:57,598 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:52:57,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:52:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:52:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:52:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:52:57,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 20:52:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:57,600 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:52:57,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:52:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:52:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:52:57,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:57,601 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 20:52:57,601 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:57,601 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:57,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-30 20:52:57,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:57,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:57,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:57,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:57,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:58,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:58,145 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:58,187 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:52:58,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:58,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:58,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:52:58,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:52:58,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:52:58,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,354 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 20:52:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:58,677 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 20:52:58,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:52:58,678 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 20:52:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:58,679 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:52:58,679 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:52:58,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:52:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:52:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:52:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:52:58,681 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 20:52:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:58,681 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:52:58,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:52:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:52:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:52:58,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:58,682 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 20:52:58,682 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:58,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-30 20:52:58,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:58,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:58,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:58,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:58,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:59,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:59,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:59,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:59,097 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:52:59,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:59,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:59,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:59,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:52:59,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:52:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:52:59,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:59,351 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 20:52:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:59,582 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:52:59,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:52:59,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 20:52:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:59,584 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:52:59,584 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:52:59,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:52:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:52:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:52:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:52:59,586 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 20:52:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:59,586 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:52:59,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:52:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:52:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:52:59,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:59,586 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 20:52:59,587 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:59,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:59,587 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-30 20:52:59,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:59,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:59,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:59,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:59,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:59,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:59,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:59,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:00,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:00,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:00,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:53:00,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:53:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:53:00,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:00,130 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 20:53:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:00,492 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 20:53:00,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:53:00,493 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 20:53:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:00,494 INFO L225 Difference]: With dead ends: 62 [2018-09-30 20:53:00,494 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:53:00,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:53:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:53:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:53:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:53:00,496 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 20:53:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:00,497 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:53:00,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:53:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:53:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:53:00,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:00,497 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 20:53:00,497 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:00,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-30 20:53:00,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:00,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:00,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:00,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:00,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:00,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:01,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:01,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:01,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:01,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:01,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:01,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:53:01,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:53:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:53:01,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:01,352 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 20:53:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:01,578 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:53:01,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:53:01,579 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 20:53:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:01,579 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:53:01,580 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:53:01,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:53:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:53:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:53:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:53:01,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 20:53:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:01,583 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:53:01,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:53:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:53:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:53:01,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:01,584 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 20:53:01,584 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:01,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-30 20:53:01,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:01,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:01,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:01,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:01,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:01,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:01,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:01,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:01,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 20:53:01,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:01,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:02,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:02,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:53:02,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:53:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:53:02,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:02,127 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 20:53:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:02,476 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 20:53:02,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:53:02,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 20:53:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:02,477 INFO L225 Difference]: With dead ends: 64 [2018-09-30 20:53:02,477 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:53:02,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:53:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:53:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:53:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:53:02,480 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 20:53:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:02,481 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:53:02,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:53:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:53:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:53:02,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:02,481 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 20:53:02,482 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:02,482 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-30 20:53:02,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:02,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:02,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:03,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:03,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:03,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:03,342 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:03,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:03,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:03,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:03,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:53:03,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:53:03,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:53:03,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:03,495 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 20:53:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:03,820 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:53:03,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:53:03,820 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 20:53:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:03,821 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:53:03,821 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:53:03,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:53:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:53:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:53:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:53:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:53:03,825 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 20:53:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:03,825 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:53:03,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:53:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:53:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:53:03,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:03,826 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 20:53:03,826 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:03,826 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-30 20:53:03,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:03,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:03,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:04,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:04,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:04,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:04,240 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 20:53:04,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:04,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:04,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:04,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:53:04,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:53:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:53:04,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:04,442 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 20:53:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:04,716 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 20:53:04,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:53:04,717 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 20:53:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:04,717 INFO L225 Difference]: With dead ends: 66 [2018-09-30 20:53:04,718 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:53:04,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:53:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:53:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:53:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:53:04,720 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 20:53:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:04,720 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:53:04,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:53:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:53:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:53:04,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:04,721 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 20:53:04,721 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:04,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-30 20:53:04,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:04,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:04,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:04,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:05,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:05,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:05,316 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:05,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:53:05,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:05,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:05,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:05,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:53:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:53:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:53:05,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:05,504 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 20:53:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:05,868 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:53:05,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:53:05,868 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 20:53:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:05,869 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:53:05,869 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:53:05,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:53:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:53:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:53:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:53:05,871 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 20:53:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:05,871 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:53:05,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:53:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:53:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:53:05,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:05,871 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 20:53:05,872 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:05,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-30 20:53:05,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:05,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:05,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:05,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:05,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:06,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:06,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:06,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:06,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:06,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:06,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:53:06,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:53:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:53:06,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:06,506 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 20:53:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:06,875 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 20:53:06,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:53:06,875 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 20:53:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:06,876 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:53:06,876 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:53:06,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:53:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:53:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:53:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:53:06,879 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 20:53:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:06,879 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:53:06,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:53:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:53:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:53:06,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:06,880 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 20:53:06,880 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:06,880 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-30 20:53:06,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:06,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:06,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:06,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:06,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:08,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:08,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:08,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:09,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:09,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:09,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:09,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:09,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:53:09,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:53:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:53:09,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:09,168 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 20:53:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:09,616 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:53:09,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:53:09,616 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 20:53:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:09,617 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:53:09,617 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:53:09,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:53:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:53:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:53:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:53:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:53:09,620 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 20:53:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:09,621 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:53:09,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:53:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:53:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:53:09,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:09,622 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 20:53:09,622 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:09,622 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-30 20:53:09,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:09,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:09,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:09,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:09,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:09,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:10,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 20:53:10,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:10,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:10,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:10,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:53:10,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:53:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:53:10,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:10,222 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 20:53:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:10,621 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 20:53:10,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:53:10,621 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 20:53:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:10,622 INFO L225 Difference]: With dead ends: 70 [2018-09-30 20:53:10,622 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:53:10,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:53:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:53:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:53:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:53:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:53:10,625 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 20:53:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:10,625 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:53:10,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:53:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:53:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:53:10,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:10,626 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 20:53:10,626 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:10,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-30 20:53:10,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:10,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:10,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:10,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:10,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:11,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:11,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:11,928 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:11,978 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:11,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:11,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:12,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:12,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:53:12,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:53:12,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:53:12,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:12,128 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 20:53:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:12,408 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:53:12,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:53:12,408 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 20:53:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:12,409 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:53:12,409 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:53:12,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:53:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:53:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:53:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:53:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:53:12,411 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 20:53:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:12,411 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:53:12,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:53:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:53:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:53:12,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:12,412 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 20:53:12,412 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:12,412 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-30 20:53:12,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:12,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:12,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:12,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:12,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:13,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:13,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:13,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:13,975 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:53:13,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:13,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:14,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:14,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:53:14,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:53:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:53:14,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:14,158 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 20:53:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:14,588 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 20:53:14,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:53:14,589 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 20:53:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:14,589 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:53:14,590 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:53:14,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:53:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:53:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:53:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:53:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:53:14,591 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 20:53:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:14,592 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:53:14,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:53:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:53:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:53:14,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:14,592 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 20:53:14,593 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:14,593 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-30 20:53:14,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:14,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:14,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:14,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:14,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:14,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:14,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:14,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:14,975 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:53:14,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:14,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:16,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:16,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:53:16,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:53:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:53:16,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:16,104 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 20:53:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:16,492 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:53:16,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:53:16,492 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 20:53:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:16,493 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:53:16,493 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:53:16,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:53:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:53:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:53:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:53:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:53:16,496 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 20:53:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:16,496 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:53:16,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:53:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:53:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:53:16,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:16,497 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 20:53:16,497 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:16,497 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-30 20:53:16,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:16,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:16,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:16,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:16,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:16,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:16,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:16,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:16,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:17,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:17,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:53:17,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:53:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:53:17,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:17,067 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 20:53:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:17,466 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 20:53:17,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:53:17,466 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 20:53:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:17,467 INFO L225 Difference]: With dead ends: 74 [2018-09-30 20:53:17,467 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:53:17,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:53:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:53:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:53:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:53:17,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 20:53:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:17,469 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:53:17,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:53:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:53:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:53:17,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:17,470 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 20:53:17,470 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:17,470 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-30 20:53:17,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:17,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:17,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:17,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:17,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:17,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:53:17,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:17,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:17,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:17,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:18,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:18,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:53:18,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:53:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:53:18,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:18,033 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 20:53:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:18,597 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:53:18,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:53:18,598 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 20:53:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:18,598 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:53:18,599 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:53:18,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:53:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:53:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:53:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:53:18,600 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 20:53:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:18,601 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:53:18,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:53:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:53:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:53:18,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:18,602 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 20:53:18,602 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:18,602 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-30 20:53:18,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:18,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:18,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:18,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:18,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:18,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:18,969 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 [2018-09-30 20:53:18,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:19,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:53:19,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:19,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:19,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:19,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:53:19,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:53:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:53:19,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:19,445 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 20:53:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:19,871 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 20:53:19,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:53:19,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 20:53:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:19,872 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:53:19,872 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:53:19,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:53:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:53:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:53:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:53:19,875 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 20:53:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:19,875 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:53:19,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:53:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:53:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:53:19,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:19,876 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 20:53:19,876 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:19,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:19,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-30 20:53:19,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:19,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:19,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:19,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:19,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:20,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:20,235 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 [2018-09-30 20:53:20,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:20,295 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:20,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:20,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:20,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:20,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:53:20,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:53:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:53:20,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:20,445 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 20:53:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:20,955 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:53:20,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:53:20,956 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 20:53:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:20,956 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:53:20,956 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:53:20,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:53:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:53:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:53:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:53:20,959 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 20:53:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:20,959 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:53:20,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:53:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:53:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:53:20,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:20,960 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 20:53:20,960 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:20,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-30 20:53:20,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:20,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:20,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:20,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:20,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:21,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:21,331 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 [2018-09-30 20:53:21,338 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:21,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:53:21,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:21,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:21,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:21,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:53:21,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:53:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:53:21,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:21,876 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 20:53:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:22,211 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 20:53:22,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:53:22,212 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 20:53:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:22,213 INFO L225 Difference]: With dead ends: 78 [2018-09-30 20:53:22,213 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:53:22,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:53:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:53:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:53:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:53:22,216 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 20:53:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:22,216 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:53:22,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:53:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:53:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:53:22,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:22,217 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 20:53:22,217 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:22,217 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-30 20:53:22,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:22,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:22,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:22,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:22,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:22,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:22,715 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 [2018-09-30 20:53:22,723 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:22,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:53:22,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:22,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:23,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:23,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:53:23,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:53:23,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:53:23,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:23,002 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 20:53:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:23,278 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:53:23,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:53:23,279 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 20:53:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:23,280 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:53:23,280 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:53:23,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:53:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:53:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:53:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:53:23,282 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 20:53:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:23,282 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:53:23,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:53:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:53:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:53:23,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:23,283 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 20:53:23,283 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:23,284 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-30 20:53:23,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:23,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:23,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:23,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:23,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:24,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:24,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:53:24,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:24,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:24,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:24,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:53:24,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:53:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:53:24,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:24,245 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 20:53:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:24,686 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 20:53:24,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:53:24,686 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 20:53:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:24,687 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:53:24,687 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:53:24,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:53:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:53:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:53:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:53:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:53:24,690 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 20:53:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:24,690 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:53:24,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:53:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:53:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:53:24,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:24,691 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 20:53:24,691 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:24,691 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-30 20:53:24,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:24,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:24,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:24,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:24,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:25,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:25,081 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 [2018-09-30 20:53:25,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:25,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:25,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:25,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:25,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:25,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:53:25,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:53:25,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:53:25,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:25,282 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 20:53:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:25,750 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:53:25,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:53:25,751 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 20:53:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:25,751 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:53:25,752 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:53:25,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:53:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:53:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:53:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:53:25,755 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 20:53:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:25,755 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:53:25,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:53:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:53:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:53:25,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:25,756 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 20:53:25,756 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:25,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-30 20:53:25,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:25,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:25,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:25,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:25,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:26,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:26,173 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 [2018-09-30 20:53:26,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:26,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 20:53:26,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:26,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:26,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:26,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:53:26,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:53:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:53:26,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:26,415 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 20:53:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:26,870 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 20:53:26,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:53:26,871 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 20:53:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:26,871 INFO L225 Difference]: With dead ends: 82 [2018-09-30 20:53:26,871 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:53:26,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:53:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:53:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:53:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:53:26,874 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 20:53:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:26,874 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:53:26,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:53:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:53:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:53:26,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:26,876 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 20:53:26,876 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:26,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:26,876 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-30 20:53:26,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:26,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:26,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:26,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:26,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:27,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:27,302 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 [2018-09-30 20:53:27,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:27,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:27,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:27,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:27,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:27,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:53:27,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:53:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:53:27,517 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:27,517 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 20:53:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:28,501 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:53:28,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:53:28,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 20:53:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:28,502 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:53:28,502 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:53:28,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:53:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:53:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:53:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:53:28,504 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 20:53:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:28,504 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:53:28,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:53:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:53:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:53:28,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:28,505 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 20:53:28,505 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:28,506 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-30 20:53:28,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:28,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:28,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:28,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:28,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:28,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:28,983 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 [2018-09-30 20:53:28,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:29,057 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 20:53:29,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:29,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:29,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:29,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:53:29,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:53:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:53:29,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:29,324 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 20:53:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:29,666 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 20:53:29,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:53:29,666 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 20:53:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:29,667 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:53:29,667 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:53:29,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:53:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:53:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:53:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:53:29,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 20:53:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:29,670 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:53:29,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:53:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:53:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:53:29,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:29,671 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 20:53:29,671 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:29,672 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-30 20:53:29,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:29,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:29,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:29,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:29,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:30,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:30,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:30,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:30,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 20:53:30,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:30,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:30,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:30,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:53:30,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:53:30,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:53:30,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:30,328 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 20:53:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:30,710 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:53:30,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:53:30,711 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 20:53:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:30,711 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:53:30,712 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:53:30,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:53:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:53:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:53:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:53:30,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 20:53:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:30,715 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:53:30,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:53:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:53:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:53:30,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:30,716 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 20:53:30,716 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:30,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-30 20:53:30,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:30,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:30,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:30,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:30,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:31,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:31,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:31,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:31,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:31,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:31,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:53:31,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:53:31,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:53:31,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:31,755 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 20:53:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:32,241 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 20:53:32,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:53:32,242 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 20:53:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:32,243 INFO L225 Difference]: With dead ends: 86 [2018-09-30 20:53:32,243 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:53:32,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:53:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:53:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:53:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:53:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:53:32,245 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 20:53:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:32,245 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:53:32,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:53:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:53:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:53:32,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:32,245 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 20:53:32,246 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:32,246 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-30 20:53:32,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:32,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:32,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:32,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:32,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:32,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:32,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:32,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:32,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:32,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:32,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:33,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:33,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:53:33,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:53:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:53:33,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:33,597 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 20:53:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:34,016 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:53:34,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:53:34,016 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 20:53:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:34,017 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:53:34,017 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:53:34,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:53:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:53:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:53:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:53:34,019 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 20:53:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:34,019 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:53:34,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:53:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:53:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:53:34,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:34,020 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 20:53:34,020 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:34,020 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:34,020 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-30 20:53:34,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:34,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:34,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:34,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:34,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:34,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:34,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:34,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:34,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 20:53:34,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:34,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:34,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:34,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:53:34,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:53:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:53:34,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:34,730 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 20:53:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:35,201 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 20:53:35,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:53:35,202 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 20:53:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:35,202 INFO L225 Difference]: With dead ends: 88 [2018-09-30 20:53:35,202 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:53:35,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:35,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:53:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:53:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:53:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:53:35,205 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 20:53:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:35,205 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:53:35,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:53:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:53:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:53:35,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:35,206 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 20:53:35,206 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:35,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-30 20:53:35,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:35,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:35,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:35,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:35,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:35,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:35,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:36,037 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:36,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:36,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:36,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:36,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:53:36,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:53:36,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:53:36,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:36,504 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 20:53:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:36,923 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:53:36,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:53:36,923 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 20:53:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:36,924 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:53:36,924 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:53:36,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:53:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:53:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:53:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:53:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:53:36,926 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 20:53:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:36,927 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:53:36,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:53:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:53:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:53:36,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:36,928 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 20:53:36,928 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:36,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-30 20:53:36,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:36,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:36,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:36,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:36,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:37,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:37,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:37,418 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:37,490 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 20:53:37,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:37,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:37,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:37,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:53:37,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:53:37,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:53:37,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:37,661 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 20:53:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:38,177 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 20:53:38,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:53:38,177 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 20:53:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:38,178 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:53:38,178 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:53:38,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:53:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:53:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:53:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:53:38,180 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 20:53:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:38,180 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:53:38,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:53:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:53:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:53:38,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:38,181 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 20:53:38,181 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:38,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-30 20:53:38,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:38,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:38,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:38,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:38,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:38,816 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:38,896 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:53:38,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:38,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:39,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:39,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:53:39,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:53:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:53:39,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:39,119 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 20:53:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:40,665 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:53:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:53:40,665 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 20:53:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:40,666 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:53:40,666 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:53:40,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:53:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:53:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:53:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:53:40,669 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 20:53:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:40,670 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:53:40,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:53:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:53:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:53:40,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:40,670 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 20:53:40,671 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:40,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-30 20:53:40,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:40,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:40,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:41,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:41,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:41,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:41,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:41,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:41,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:53:41,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:53:41,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:53:41,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:41,359 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 20:53:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:41,738 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 20:53:41,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:53:41,739 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 20:53:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:41,740 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:53:41,740 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:53:41,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:53:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:53:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:53:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:53:41,743 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 20:53:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:41,744 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:53:41,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:53:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:53:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:53:41,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:41,744 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 20:53:41,745 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:41,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-30 20:53:41,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:41,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:41,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:41,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:41,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:42,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:42,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:42,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:42,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:42,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:42,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:42,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:42,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:53:42,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:53:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:53:42,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:42,427 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 20:53:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:42,785 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:53:42,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:53:42,786 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 20:53:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:42,786 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:53:42,787 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:53:42,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:53:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:53:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:53:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:53:42,789 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 20:53:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:42,789 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:53:42,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:53:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:53:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:53:42,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:42,790 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 20:53:42,790 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:42,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-30 20:53:42,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:42,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:42,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:42,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:42,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:43,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:43,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:43,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:43,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 20:53:43,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:43,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:43,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:43,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:53:43,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:53:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:53:43,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:43,626 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 20:53:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:44,092 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 20:53:44,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:53:44,093 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 20:53:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:44,093 INFO L225 Difference]: With dead ends: 94 [2018-09-30 20:53:44,094 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:53:44,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:53:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:53:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:53:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:53:44,097 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 20:53:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:44,097 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:53:44,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:53:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:53:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:53:44,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:44,097 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 20:53:44,098 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:44,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-30 20:53:44,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:44,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:44,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:44,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:44,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:44,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:44,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:44,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:44,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:44,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:44,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:44,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:44,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:53:44,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:53:44,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:53:44,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:44,838 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 20:53:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:45,197 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:53:45,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:53:45,198 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 20:53:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:45,199 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:53:45,199 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:53:45,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:53:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:53:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:53:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:53:45,202 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 20:53:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:45,202 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:53:45,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:53:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:53:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:53:45,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:45,203 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 20:53:45,203 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:45,203 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-30 20:53:45,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:45,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:45,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:45,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:45,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:45,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:45,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:45,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:45,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:53:45,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:45,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:46,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:46,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:53:46,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:53:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:53:46,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:46,102 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 20:53:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:46,479 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 20:53:46,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:53:46,479 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 20:53:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:46,480 INFO L225 Difference]: With dead ends: 96 [2018-09-30 20:53:46,480 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:53:46,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:53:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:53:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:53:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:53:46,483 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 20:53:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:46,483 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:53:46,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:53:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:53:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:53:46,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:46,484 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 20:53:46,484 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:46,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-30 20:53:46,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:46,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:46,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:46,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:46,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:46,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:46,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:46,971 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:47,052 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:53:47,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:47,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:47,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:47,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:53:47,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:53:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:53:47,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:47,237 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 20:53:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:47,673 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:53:47,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:53:47,673 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 20:53:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:47,674 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:53:47,674 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:53:47,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:53:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:53:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:53:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:53:47,677 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 20:53:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:47,677 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:53:47,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:53:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:53:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:53:47,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:47,678 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 20:53:47,678 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:47,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-30 20:53:47,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:47,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:47,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:47,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:47,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:48,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:48,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:48,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:48,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:48,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:48,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:53:48,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:53:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:53:48,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:48,451 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 20:53:49,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:49,049 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 20:53:49,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:53:49,050 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 20:53:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:49,051 INFO L225 Difference]: With dead ends: 98 [2018-09-30 20:53:49,051 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:53:49,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:53:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:53:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:53:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:53:49,054 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 20:53:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:49,054 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:53:49,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:53:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:53:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:53:49,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:49,055 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 20:53:49,055 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:49,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:49,056 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-30 20:53:49,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:49,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:49,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:49,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:49,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:49,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:49,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:49,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:49,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:49,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:49,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:49,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:49,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:53:49,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:53:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:53:49,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:49,905 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 20:53:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:50,523 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:53:50,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:53:50,523 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 20:53:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:50,524 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:53:50,524 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:53:50,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:53:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:53:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:53:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:53:50,527 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 20:53:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:50,527 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:53:50,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:53:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:53:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:53:50,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:50,527 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 20:53:50,528 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:50,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-30 20:53:50,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:50,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:50,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:50,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:50,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:51,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:51,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:51,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:51,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:53:51,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:51,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:51,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:51,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:53:51,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:53:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:53:51,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:51,467 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 20:53:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:51,914 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 20:53:51,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:53:51,915 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 20:53:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:51,915 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:53:51,915 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:53:51,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:53:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:53:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:53:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:53:51,918 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 20:53:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:51,918 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:53:51,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:53:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:53:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:53:51,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:51,919 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 20:53:51,919 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:51,919 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:51,919 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-30 20:53:51,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:51,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:51,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:51,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:51,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:52,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:52,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:52,436 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:52,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:52,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:52,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:52,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:52,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:53:52,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:53:52,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:53:52,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:52,707 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 20:53:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:53,324 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:53:53,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:53:53,324 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 20:53:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:53,325 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:53:53,325 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:53:53,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:53:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:53:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:53:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:53:53,328 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 20:53:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:53,329 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:53:53,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:53:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:53:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:53:53,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:53,329 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 20:53:53,329 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:53,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:53,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-30 20:53:53,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:53,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:53,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:53,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:53,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:54,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:54,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:54,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:54,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:53:54,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:54,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:54,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:54,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:53:54,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:53:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:53:54,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:54,332 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 20:53:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:54,804 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 20:53:54,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:53:54,804 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 20:53:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:54,805 INFO L225 Difference]: With dead ends: 102 [2018-09-30 20:53:54,805 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:53:54,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:53:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:53:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:53:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:53:54,807 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 20:53:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:54,807 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:53:54,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:53:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:53:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:53:54,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:54,808 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 20:53:54,808 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:54,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-30 20:53:54,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:54,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:54,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:54,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:54,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:55,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:55,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:55,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:55,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:53:55,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:55,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:55,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:55,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 20:53:55,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 20:53:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 20:53:55,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:55,653 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 20:53:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:56,088 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:53:56,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:53:56,088 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 20:53:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:56,088 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:53:56,089 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:53:56,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:53:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:53:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:53:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:53:56,091 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 20:53:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:56,091 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:53:56,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 20:53:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:53:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:53:56,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:56,092 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 20:53:56,092 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:56,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-30 20:53:56,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:56,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:56,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:56,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:56,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:56,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:56,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:56,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:56,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:56,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:56,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:53:56,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:53:56,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:53:56,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:56,874 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 20:53:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:57,532 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 20:53:57,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:53:57,532 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 20:53:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:57,533 INFO L225 Difference]: With dead ends: 104 [2018-09-30 20:53:57,533 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:53:57,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:53:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:53:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:53:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:53:57,535 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 20:53:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:57,536 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:53:57,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:53:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:53:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:53:57,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:57,536 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 20:53:57,536 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:57,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-30 20:53:57,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:57,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:57,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:57,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:57,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:58,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:58,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:58,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:58,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:58,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:58,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:58,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:58,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 20:53:58,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:53:58,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:53:58,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:58,330 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 20:53:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:59,001 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:53:59,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:53:59,002 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 20:53:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:59,003 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:53:59,003 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:53:59,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:53:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:53:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:53:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:53:59,006 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 20:53:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:59,006 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:53:59,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:53:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:53:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:53:59,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:59,006 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 20:53:59,007 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:59,007 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:59,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-30 20:53:59,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:59,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:59,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:59,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:59,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:59,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:59,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:59,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:59,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 20:53:59,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:59,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:59,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:59,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:53:59,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:53:59,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:53:59,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:59,886 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 20:54:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:00,516 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 20:54:00,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:54:00,517 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 20:54:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:00,517 INFO L225 Difference]: With dead ends: 106 [2018-09-30 20:54:00,517 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:54:00,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:54:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:54:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:54:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:54:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:54:00,520 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 20:54:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:00,520 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:54:00,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:54:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:54:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:54:00,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:00,521 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 20:54:00,521 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:00,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-30 20:54:00,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:00,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:00,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:00,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:00,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:01,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:01,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:01,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:01,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:01,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:01,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:01,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:01,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 20:54:01,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:54:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:54:01,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:01,368 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 20:54:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:01,984 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:54:01,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:54:01,985 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 20:54:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:01,986 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:54:01,986 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:54:01,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:54:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:54:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:54:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:54:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:54:01,989 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 20:54:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:01,989 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:54:01,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:54:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:54:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:54:01,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:01,990 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 20:54:01,990 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:01,990 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-30 20:54:01,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:01,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:01,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:01,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:01,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:02,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:02,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:02,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:02,707 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 20:54:02,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:02,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:02,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:02,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:54:02,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:54:02,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:54:02,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:02,916 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 20:54:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:03,576 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 20:54:03,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:54:03,576 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 20:54:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:03,577 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:54:03,578 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:54:03,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:54:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:54:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:54:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:54:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:54:03,581 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 20:54:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:03,581 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:54:03,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:54:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:54:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:54:03,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:03,582 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 20:54:03,582 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:03,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-30 20:54:03,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:03,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:03,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:04,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:04,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:04,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:04,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 20:54:04,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:04,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:04,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:04,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 20:54:04,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 20:54:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 20:54:04,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:04,628 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 20:54:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:05,341 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:54:05,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:54:05,342 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 20:54:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:05,342 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:54:05,342 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:54:05,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:54:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:54:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:54:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:54:05,346 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 20:54:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:05,346 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:54:05,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 20:54:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:54:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:54:05,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:05,346 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 20:54:05,347 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:05,347 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-30 20:54:05,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:05,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:05,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:05,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:05,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:05,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:05,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:05,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:06,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:06,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:06,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:54:06,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:54:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:54:06,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:06,287 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 20:54:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:07,061 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 20:54:07,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:54:07,062 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 20:54:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:07,062 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:54:07,062 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:54:07,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:54:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:54:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:54:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:54:07,065 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 20:54:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:07,065 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:54:07,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:54:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:54:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:54:07,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:07,066 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 20:54:07,066 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:07,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-30 20:54:07,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:07,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:07,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:07,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:07,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:07,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:07,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:07,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:07,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:07,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:07,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:08,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:08,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 20:54:08,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:54:08,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:54:08,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:08,021 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 20:54:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:08,525 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:54:08,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:54:08,526 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 20:54:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:08,526 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:54:08,526 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:54:08,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:54:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:54:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:54:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 20:54:08,528 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 20:54:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:08,531 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 20:54:08,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:54:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 20:54:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:54:08,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:08,531 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 20:54:08,532 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:08,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-30 20:54:08,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:08,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:08,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:08,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:08,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:09,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:09,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:09,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:09,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 20:54:09,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:09,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:09,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:09,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:54:09,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:54:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:54:09,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:09,458 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 20:54:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:10,059 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 20:54:10,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:54:10,060 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 20:54:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:10,060 INFO L225 Difference]: With dead ends: 112 [2018-09-30 20:54:10,060 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:54:10,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:54:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:54:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:54:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:54:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:54:10,062 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 20:54:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:10,062 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:54:10,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:54:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:54:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:54:10,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:10,063 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 20:54:10,063 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:10,064 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:10,064 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-30 20:54:10,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:10,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:10,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:10,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:10,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:10,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:10,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:10,657 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:10,719 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:10,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:10,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:10,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:10,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 20:54:10,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 20:54:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 20:54:10,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:10,937 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 20:54:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:11,736 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:54:11,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:54:11,736 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 20:54:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:11,736 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:54:11,736 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:54:11,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:54:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:54:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:54:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:54:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:54:11,739 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 20:54:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:11,739 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:54:11,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 20:54:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:54:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:54:11,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:11,740 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 20:54:11,740 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:11,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-30 20:54:11,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:11,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:11,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:11,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:11,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:12,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:12,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:12,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:12,467 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 20:54:12,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:12,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:12,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:12,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 20:54:12,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:54:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:54:12,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:12,680 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 20:54:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:13,401 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 20:54:13,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 20:54:13,402 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 20:54:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:13,402 INFO L225 Difference]: With dead ends: 114 [2018-09-30 20:54:13,403 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:54:13,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:54:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:54:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:54:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:54:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:54:13,405 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 20:54:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:13,405 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:54:13,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:54:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:54:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:54:13,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:13,405 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 20:54:13,406 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:13,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-09-30 20:54:13,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:13,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:13,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:13,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:13,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:14,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:14,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:14,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:14,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:54:14,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:14,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:14,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:14,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 20:54:14,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 20:54:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 20:54:14,452 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:14,452 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 20:54:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:15,348 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:54:15,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 20:54:15,348 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 20:54:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:15,348 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:54:15,348 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:54:15,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:54:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:54:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:54:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 20:54:15,351 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 20:54:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:15,351 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 20:54:15,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 20:54:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 20:54:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:54:15,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:15,353 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 20:54:15,353 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:15,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-09-30 20:54:15,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:15,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:15,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:15,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:15,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:15,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:15,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:15,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:16,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:16,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:16,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 20:54:16,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:54:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:54:16,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:16,267 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 20:54:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:16,941 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 20:54:16,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 20:54:16,941 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 20:54:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:16,942 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:54:16,942 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:54:16,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:54:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:54:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:54:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:54:16,944 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 20:54:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:16,945 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:54:16,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:54:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:54:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:54:16,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:16,945 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 20:54:16,946 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:16,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-09-30 20:54:16,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:16,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:16,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:16,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:16,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:17,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:17,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:17,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:17,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:17,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:17,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:17,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:17,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 20:54:17,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:54:17,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:54:17,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:17,900 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 20:54:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:18,659 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:54:18,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 20:54:18,660 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 20:54:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:18,660 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:54:18,661 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:54:18,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:54:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:54:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:54:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:54:18,663 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 20:54:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:18,664 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:54:18,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:54:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:54:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:54:18,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:18,665 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 20:54:18,665 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:18,665 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-09-30 20:54:18,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:18,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:18,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:19,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:19,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:19,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:19,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 20:54:19,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:19,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:19,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:19,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 20:54:19,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:54:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:54:19,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:19,837 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 20:54:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:20,424 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 20:54:20,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 20:54:20,424 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 20:54:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:20,425 INFO L225 Difference]: With dead ends: 118 [2018-09-30 20:54:20,425 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:54:20,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:54:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:54:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:54:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:54:20,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 20:54:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:20,428 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:54:20,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:54:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:54:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:54:20,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:20,429 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 20:54:20,429 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:20,429 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-09-30 20:54:20,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:20,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:20,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:20,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:20,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:21,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:21,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:21,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:21,125 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:21,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:21,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:21,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:21,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 20:54:21,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 20:54:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 20:54:21,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:21,431 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 20:54:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:22,317 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:54:22,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 20:54:22,317 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 20:54:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:22,318 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:54:22,318 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:54:22,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:54:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:54:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:54:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 20:54:22,320 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 20:54:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:22,320 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 20:54:22,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 20:54:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 20:54:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:54:22,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:22,321 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 20:54:22,321 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:22,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-09-30 20:54:22,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:22,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:22,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:22,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:22,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:23,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:23,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:23,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:23,215 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 20:54:23,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:23,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:23,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:23,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 20:54:23,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:54:23,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:54:23,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:23,593 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 20:54:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:24,212 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 20:54:24,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 20:54:24,213 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 20:54:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:24,213 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:54:24,213 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:54:24,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:54:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:54:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:54:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:54:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:54:24,215 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 20:54:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:24,215 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:54:24,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:54:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:54:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:54:24,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:24,216 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 20:54:24,216 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:24,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:24,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-09-30 20:54:24,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:24,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:24,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:25,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:25,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:25,013 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:25,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 20:54:25,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:25,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:25,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:25,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 20:54:25,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 20:54:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 20:54:25,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:25,357 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 20:54:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:26,124 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:54:26,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 20:54:26,125 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 20:54:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:26,125 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:54:26,125 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:54:26,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:54:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:54:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:54:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:54:26,128 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 20:54:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:26,128 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:54:26,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 20:54:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:54:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:54:26,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:26,128 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 20:54:26,129 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:26,129 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:26,129 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-09-30 20:54:26,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:26,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:26,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:26,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:26,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:26,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:26,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:26,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:26,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:27,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:27,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 20:54:27,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:54:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:54:27,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:27,089 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 20:54:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:27,646 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 20:54:27,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 20:54:27,646 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 20:54:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:27,646 INFO L225 Difference]: With dead ends: 122 [2018-09-30 20:54:27,647 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:54:27,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:54:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:54:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:54:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:54:27,649 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 20:54:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:27,649 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:54:27,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:54:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:54:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:54:27,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:27,650 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 20:54:27,650 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:27,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-09-30 20:54:27,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:27,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:27,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:27,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:27,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:28,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:28,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:28,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:28,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:28,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:28,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:28,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:28,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 20:54:28,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 20:54:28,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 20:54:28,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:28,643 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 20:54:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:29,349 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:54:29,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 20:54:29,349 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 20:54:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:29,350 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:54:29,350 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:54:29,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:54:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:54:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:54:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 20:54:29,352 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 20:54:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:29,352 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 20:54:29,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 20:54:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 20:54:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:54:29,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:29,353 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 20:54:29,353 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:29,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-09-30 20:54:29,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:29,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:29,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:29,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:29,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:30,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:30,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:30,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:30,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 20:54:30,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:30,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:30,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:30,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 20:54:30,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:54:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:54:30,440 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:30,440 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 20:54:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:31,190 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 20:54:31,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 20:54:31,190 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 20:54:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:31,190 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:54:31,191 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:54:31,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:54:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:54:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:54:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:54:31,193 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 20:54:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:31,193 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:54:31,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:54:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:54:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:54:31,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:31,194 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 20:54:31,194 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:31,194 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-09-30 20:54:31,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:31,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:31,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:31,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:31,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:31,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:31,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:31,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:31,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:31,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:32,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:32,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 20:54:32,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 20:54:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 20:54:32,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:32,182 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 20:54:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:32,786 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:54:32,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:54:32,787 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 20:54:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:32,787 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:54:32,787 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:54:32,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:54:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:54:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:54:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:54:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:54:32,791 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 20:54:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:32,791 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:54:32,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 20:54:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:54:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:54:32,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:32,792 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 20:54:32,792 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:32,792 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-09-30 20:54:32,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:32,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:32,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:32,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:32,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:33,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:33,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:33,560 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:33,682 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 20:54:33,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:33,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:33,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:33,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 20:54:33,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:54:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:54:33,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:33,920 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 20:54:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:34,719 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 20:54:34,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 20:54:34,719 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 20:54:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:34,719 INFO L225 Difference]: With dead ends: 126 [2018-09-30 20:54:34,719 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:54:34,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:54:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:54:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:54:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:54:34,722 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 20:54:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:34,723 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:54:34,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:54:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:54:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:54:34,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:34,723 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 20:54:34,724 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:34,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-09-30 20:54:34,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:34,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:34,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:34,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:34,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:35,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:35,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:35,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:35,685 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:54:35,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:35,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:35,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:35,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 20:54:35,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 20:54:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 20:54:35,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:35,920 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 20:54:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:36,799 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:54:36,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 20:54:36,799 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 20:54:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:36,800 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:54:36,800 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:54:36,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:54:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:54:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:54:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:54:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 20:54:36,802 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 20:54:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:36,802 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 20:54:36,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 20:54:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 20:54:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:54:36,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:36,803 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 20:54:36,803 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:36,803 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-09-30 20:54:36,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:36,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:36,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:36,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:36,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:37,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:37,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:37,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:37,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:37,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:37,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 20:54:37,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:54:37,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:54:37,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:37,834 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 20:54:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:38,539 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 20:54:38,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 20:54:38,539 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 20:54:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:38,540 INFO L225 Difference]: With dead ends: 128 [2018-09-30 20:54:38,540 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:54:38,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:54:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:54:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:54:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:54:38,542 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 20:54:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:38,542 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:54:38,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:54:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:54:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:54:38,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:38,543 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 20:54:38,543 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:38,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-09-30 20:54:38,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:38,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:38,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:38,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:38,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:39,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:39,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:39,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:39,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:39,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:39,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:39,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:39,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 20:54:39,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:54:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:54:39,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:39,573 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 20:54:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:40,177 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:54:40,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 20:54:40,178 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 20:54:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:40,178 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:54:40,178 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:54:40,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:54:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:54:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:54:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:54:40,181 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 20:54:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:40,182 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:54:40,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:54:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:54:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:54:40,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:40,182 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 20:54:40,183 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:40,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-09-30 20:54:40,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:40,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:40,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:40,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:40,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:40,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:40,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:40,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:41,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 20:54:41,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:41,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:41,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:41,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 20:54:41,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:54:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:54:41,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:41,324 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 20:54:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:42,012 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 20:54:42,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 20:54:42,012 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 20:54:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:42,013 INFO L225 Difference]: With dead ends: 130 [2018-09-30 20:54:42,013 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:54:42,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:54:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:54:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:54:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:54:42,015 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 20:54:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:42,015 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:54:42,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:54:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:54:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:54:42,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:42,016 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 20:54:42,016 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:42,016 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-09-30 20:54:42,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:42,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:42,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:42,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:42,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:42,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:42,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:42,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:42,811 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:42,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:42,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:43,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:43,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 20:54:43,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 20:54:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 20:54:43,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:43,074 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 20:54:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:44,108 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:54:44,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 20:54:44,108 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 20:54:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:44,108 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:54:44,108 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 20:54:44,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 20:54:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 20:54:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:54:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 20:54:44,112 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 20:54:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:44,112 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 20:54:44,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 20:54:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 20:54:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:54:44,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:44,113 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 20:54:44,113 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:44,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-09-30 20:54:44,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:44,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:44,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:44,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:44,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:44,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:44,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:44,875 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:45,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 20:54:45,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:45,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:45,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:45,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 20:54:45,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:54:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:54:45,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:45,255 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 20:54:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:46,277 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 20:54:46,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 20:54:46,277 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 20:54:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:46,278 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:54:46,278 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:54:46,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:54:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:54:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:54:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:54:46,281 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 20:54:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:46,281 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:54:46,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:54:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:54:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:54:46,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:46,282 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 20:54:46,282 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:46,282 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-09-30 20:54:46,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:46,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:46,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:46,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:46,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:47,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:47,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:47,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:47,238 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 20:54:47,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:47,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:47,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:47,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 20:54:47,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 20:54:47,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 20:54:47,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:47,487 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 20:54:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:48,411 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:54:48,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 20:54:48,411 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 20:54:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:48,412 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:54:48,412 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:54:48,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:54:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:54:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:54:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:54:48,414 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 20:54:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:48,414 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:54:48,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 20:54:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:54:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:54:48,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:48,415 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 20:54:48,415 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:48,415 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-09-30 20:54:48,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:48,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:48,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:48,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:48,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:49,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:49,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:49,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:49,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:49,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:49,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 20:54:49,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:54:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:54:49,519 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:49,519 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 20:54:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:50,572 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 20:54:50,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 20:54:50,572 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 20:54:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:50,573 INFO L225 Difference]: With dead ends: 134 [2018-09-30 20:54:50,573 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:54:50,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:54:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:54:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:54:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:54:50,576 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 20:54:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:50,576 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:54:50,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:54:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:54:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:54:50,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:50,577 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 20:54:50,578 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:50,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-09-30 20:54:50,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:50,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:50,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:50,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:50,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:51,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:51,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:51,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:51,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:51,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:51,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:51,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:51,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 20:54:51,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 20:54:51,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 20:54:51,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:51,706 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 20:54:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:52,565 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:54:52,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 20:54:52,565 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 20:54:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:52,566 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:54:52,566 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:54:52,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:54:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:54:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:54:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 20:54:52,569 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 20:54:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:52,569 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 20:54:52,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 20:54:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 20:54:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:54:52,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:52,570 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 20:54:52,570 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:52,571 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-09-30 20:54:52,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:52,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:52,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:52,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:52,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:53,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:53,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:53,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:53,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 20:54:53,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:53,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:53,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:53,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 20:54:53,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:54:53,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:54:53,799 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:53,800 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 20:54:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:54,437 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 20:54:54,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 20:54:54,437 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 20:54:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:54,437 INFO L225 Difference]: With dead ends: 136 [2018-09-30 20:54:54,438 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:54:54,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:54:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:54:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:54:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:54:54,441 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 20:54:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:54,441 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:54:54,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:54:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:54:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:54:54,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:54,442 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 20:54:54,442 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:54,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-09-30 20:54:54,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:54,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:54,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:54,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:54,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:55,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:55,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:55,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:55,426 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:55,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:55,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:55,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:55,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 20:54:55,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 20:54:55,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 20:54:55,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:55,714 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 20:54:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:56,434 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:54:56,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 20:54:56,434 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 20:54:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:56,435 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:54:56,435 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:54:56,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:54:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:54:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:54:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:54:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:54:56,437 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 20:54:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:56,437 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:54:56,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 20:54:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:54:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:54:56,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:56,438 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 20:54:56,438 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:56,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-09-30 20:54:56,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:56,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:56,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:56,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:56,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:57,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:57,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:57,242 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:57,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 20:54:57,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:57,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:57,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:57,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 20:54:57,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:54:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:54:57,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:57,648 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 20:54:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:58,784 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 20:54:58,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 20:54:58,784 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 20:54:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:58,784 INFO L225 Difference]: With dead ends: 138 [2018-09-30 20:54:58,784 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:54:58,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:54:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:54:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:54:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:54:58,787 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 20:54:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:58,787 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:54:58,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:54:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:54:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:54:58,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:58,787 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 20:54:58,788 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:58,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-09-30 20:54:58,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:58,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:58,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:58,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:58,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:59,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:59,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:59,612 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:59,752 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:54:59,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:59,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:00,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:00,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 20:55:00,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 20:55:00,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 20:55:00,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:00,015 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 20:55:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:01,036 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:55:01,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 20:55:01,036 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 20:55:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:01,037 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:55:01,037 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:55:01,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:55:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 20:55:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:55:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 20:55:01,039 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 20:55:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:01,039 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 20:55:01,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 20:55:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 20:55:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:55:01,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:01,040 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 20:55:01,040 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:01,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:01,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-09-30 20:55:01,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:01,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:01,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:01,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:01,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:01,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:01,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:01,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:01,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:02,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:02,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 20:55:02,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:55:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:55:02,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:02,205 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 20:55:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:03,363 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 20:55:03,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 20:55:03,363 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 20:55:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:03,363 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:55:03,363 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:55:03,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:55:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:55:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:55:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:55:03,366 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 20:55:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:03,367 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:55:03,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:55:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:55:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:55:03,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:03,367 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 20:55:03,367 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:03,367 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-09-30 20:55:03,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:03,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:03,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:03,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:03,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:04,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:04,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:04,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:04,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:04,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:04,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:04,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:04,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 20:55:04,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:55:04,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:55:04,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:04,546 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 20:55:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:05,249 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:55:05,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 20:55:05,250 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 20:55:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:05,250 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:55:05,250 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:55:05,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:55:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:55:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:55:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:55:05,252 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 20:55:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:05,253 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:55:05,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:55:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:55:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:55:05,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:05,253 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 20:55:05,254 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:05,254 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:05,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-09-30 20:55:05,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:05,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:05,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:05,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:05,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:06,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:06,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:06,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:06,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 20:55:06,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:06,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:06,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:06,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 20:55:06,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:55:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:55:06,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:06,562 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 20:55:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:07,746 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 20:55:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 20:55:07,747 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 20:55:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:07,747 INFO L225 Difference]: With dead ends: 142 [2018-09-30 20:55:07,748 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:55:07,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:55:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:55:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:55:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:55:07,750 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 20:55:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:07,750 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:55:07,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:55:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:55:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:55:07,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:07,751 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 20:55:07,751 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:07,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-09-30 20:55:07,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:07,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:07,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:07,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:07,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:08,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:08,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:08,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:08,680 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:08,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:08,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:08,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:08,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 20:55:08,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 20:55:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 20:55:08,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:08,975 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 20:55:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:09,948 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:55:09,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 20:55:09,948 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 20:55:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:09,948 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:55:09,949 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:55:09,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:55:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:55:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:55:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 20:55:09,951 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 20:55:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:09,951 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 20:55:09,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 20:55:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 20:55:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:55:09,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:09,951 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 20:55:09,952 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:09,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-09-30 20:55:09,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:09,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:09,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:09,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:09,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:10,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:10,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:10,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:55:10,974 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 20:55:10,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:10,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:11,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:11,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 20:55:11,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:55:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:55:11,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:11,309 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 20:55:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:12,438 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-30 20:55:12,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 20:55:12,439 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-30 20:55:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:12,439 INFO L225 Difference]: With dead ends: 144 [2018-09-30 20:55:12,439 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:55:12,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:55:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:55:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:55:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:55:12,442 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-30 20:55:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:12,442 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:55:12,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:55:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:55:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:55:12,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:12,442 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-30 20:55:12,442 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:12,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1580539168, now seen corresponding path program 138 times [2018-09-30 20:55:12,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:12,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:12,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:12,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:12,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:13,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:13,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:13,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:55:13,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 20:55:13,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:13,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:13,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:13,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 20:55:13,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 20:55:13,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 20:55:13,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:13,743 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-30 20:55:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:14,930 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:55:14,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 20:55:14,930 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-30 20:55:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:14,930 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:55:14,930 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:55:14,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:55:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:55:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:55:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:55:14,933 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-30 20:55:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:14,933 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:55:14,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 20:55:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:55:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:55:14,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:14,934 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-30 20:55:14,934 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:14,934 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:14,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1752070086, now seen corresponding path program 139 times [2018-09-30 20:55:14,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:14,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:14,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:14,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:14,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:15,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:15,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:15,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:15,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:16,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:16,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 20:55:16,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:55:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:55:16,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:16,195 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-30 20:55:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:17,302 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-30 20:55:17,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 20:55:17,302 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 20:55:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:17,303 INFO L225 Difference]: With dead ends: 146 [2018-09-30 20:55:17,303 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:55:17,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:55:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:55:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:55:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:55:17,305 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-30 20:55:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:17,305 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:55:17,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:55:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:55:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:55:17,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:17,306 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-30 20:55:17,306 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:17,306 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:17,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1520406048, now seen corresponding path program 140 times [2018-09-30 20:55:17,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:17,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:17,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:17,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:17,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:18,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:18,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:18,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:18,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:18,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:18,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:18,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:18,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 20:55:18,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 20:55:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 20:55:18,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:18,576 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-30 20:55:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:19,853 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:55:19,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 20:55:19,853 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-30 20:55:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:19,853 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:55:19,854 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 20:55:19,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 20:55:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 20:55:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:55:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 20:55:19,856 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-30 20:55:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:19,856 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 20:55:19,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 20:55:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 20:55:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:55:19,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:19,857 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-30 20:55:19,857 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:19,857 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 112048902, now seen corresponding path program 141 times [2018-09-30 20:55:19,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:19,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:19,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:19,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:19,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:20,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:20,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:20,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:20,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 20:55:20,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:20,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:21,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:21,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 20:55:21,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:55:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:55:21,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:21,219 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-30 20:55:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:22,595 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-30 20:55:22,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 20:55:22,595 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-30 20:55:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:22,596 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:55:22,596 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:55:22,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:55:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:55:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:55:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:55:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:55:22,598 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-30 20:55:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:22,598 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:55:22,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:55:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:55:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:55:22,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:22,599 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-30 20:55:22,599 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:22,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash -821455200, now seen corresponding path program 142 times [2018-09-30 20:55:22,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:22,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:22,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:22,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:22,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:23,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:23,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:23,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:23,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:23,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:23,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:23,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:23,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 20:55:23,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 20:55:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 20:55:23,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:23,930 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-30 20:55:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:24,733 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:55:24,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 20:55:24,733 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-30 20:55:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:24,734 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:55:24,734 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:55:24,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:55:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:55:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:55:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:55:24,736 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-30 20:55:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:24,737 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:55:24,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 20:55:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:55:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:55:24,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:24,738 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-30 20:55:24,738 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:24,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash 304688710, now seen corresponding path program 143 times [2018-09-30 20:55:24,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:24,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:24,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:24,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:24,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:25,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:25,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:25,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:55:25,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 20:55:25,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:25,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:26,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:26,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 20:55:26,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:55:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:55:26,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:26,129 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-30 20:55:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:27,586 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-30 20:55:27,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 20:55:27,587 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 20:55:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:27,587 INFO L225 Difference]: With dead ends: 150 [2018-09-30 20:55:27,587 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:55:27,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:55:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:55:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:55:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:55:27,590 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-30 20:55:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:27,590 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:55:27,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:55:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:55:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:55:27,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:27,591 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-30 20:55:27,591 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:27,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash 855411552, now seen corresponding path program 144 times [2018-09-30 20:55:27,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:27,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:27,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:27,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:27,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:28,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:28,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:28,540 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:55:28,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:55:28,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:28,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:28,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:28,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 20:55:28,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 20:55:28,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 20:55:28,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:28,980 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-30 20:55:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:30,405 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:55:30,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 20:55:30,405 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-30 20:55:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:30,406 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:55:30,406 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:55:30,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:55:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:55:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:55:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 20:55:30,408 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-30 20:55:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:30,409 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 20:55:30,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 20:55:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 20:55:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:55:30,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:30,409 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-30 20:55:30,410 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:30,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash 747950470, now seen corresponding path program 145 times [2018-09-30 20:55:30,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:30,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:30,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:30,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:30,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:31,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:31,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:31,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:31,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:31,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:31,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 20:55:31,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:55:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:55:31,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:31,727 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-30 20:55:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:32,533 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-30 20:55:32,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 20:55:32,534 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-30 20:55:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:32,534 INFO L225 Difference]: With dead ends: 152 [2018-09-30 20:55:32,534 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:55:32,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:55:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:55:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:55:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:55:32,537 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-30 20:55:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:32,537 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:55:32,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:55:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:55:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:55:32,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:32,537 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-30 20:55:32,537 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:32,538 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1711624224, now seen corresponding path program 146 times [2018-09-30 20:55:32,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:32,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:32,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:32,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:32,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:33,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:33,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:33,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:33,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:33,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:33,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:33,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:33,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 20:55:33,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 20:55:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 20:55:33,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:33,845 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-30 20:55:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:35,064 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:55:35,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 20:55:35,065 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-30 20:55:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:35,065 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:55:35,065 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:55:35,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:55:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:55:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:55:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:55:35,068 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-30 20:55:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:35,068 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:55:35,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 20:55:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:55:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:55:35,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:35,069 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-30 20:55:35,069 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:35,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1520739526, now seen corresponding path program 147 times [2018-09-30 20:55:35,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:35,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:35,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:35,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:35,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:36,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:36,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:36,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:36,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 20:55:36,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:36,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:36,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:36,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 20:55:36,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:55:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:55:36,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:36,505 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-30 20:55:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:38,016 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-30 20:55:38,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 20:55:38,016 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-30 20:55:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:38,017 INFO L225 Difference]: With dead ends: 154 [2018-09-30 20:55:38,017 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:55:38,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:55:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:55:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:55:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:55:38,020 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-30 20:55:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:38,020 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:55:38,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:55:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:55:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:55:38,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:38,021 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-30 20:55:38,021 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:38,022 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -101718816, now seen corresponding path program 148 times [2018-09-30 20:55:38,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:38,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:38,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:38,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:38,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:38,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:38,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:38,985 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:39,070 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:39,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:39,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:39,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:39,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 20:55:39,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 20:55:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 20:55:39,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:39,364 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-30 20:55:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:40,913 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:55:40,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 20:55:40,913 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-30 20:55:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:40,914 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:55:40,914 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 20:55:40,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 20:55:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 20:55:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:55:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 20:55:40,916 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-30 20:55:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:40,916 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 20:55:40,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 20:55:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 20:55:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:55:40,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:40,917 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-30 20:55:40,917 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:40,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:40,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1141680134, now seen corresponding path program 149 times [2018-09-30 20:55:40,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:40,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:40,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:40,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:40,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:41,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:41,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:41,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:55:42,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 20:55:42,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:42,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:42,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:42,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 20:55:42,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:55:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:55:42,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:42,387 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-09-30 20:55:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:43,928 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-09-30 20:55:43,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 20:55:43,929 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-09-30 20:55:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:43,929 INFO L225 Difference]: With dead ends: 156 [2018-09-30 20:55:43,929 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:55:43,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:55:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:55:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:55:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 20:55:43,932 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-09-30 20:55:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:43,932 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 20:55:43,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 20:55:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 20:55:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:55:43,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:43,933 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-09-30 20:55:43,933 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:43,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1032341920, now seen corresponding path program 150 times [2018-09-30 20:55:43,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:43,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:43,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:43,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:43,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:44,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:44,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:44,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:55:45,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-09-30 20:55:45,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:45,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:45,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:45,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-30 20:55:45,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-30 20:55:45,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-30 20:55:45,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:45,367 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-09-30 20:55:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:46,878 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:55:46,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 20:55:46,878 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-09-30 20:55:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:46,879 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:55:46,879 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:55:46,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:55:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:55:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:55:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 20:55:46,881 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-09-30 20:55:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:46,881 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 20:55:46,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-30 20:55:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 20:55:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:55:46,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:46,882 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-09-30 20:55:46,882 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:46,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1937824582, now seen corresponding path program 151 times [2018-09-30 20:55:46,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:46,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:46,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:46,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:46,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:47,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:47,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:47,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:47,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:48,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:48,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 20:55:48,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 20:55:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 20:55:48,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:48,224 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-09-30 20:55:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:49,701 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-09-30 20:55:49,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 20:55:49,701 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-30 20:55:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:49,702 INFO L225 Difference]: With dead ends: 158 [2018-09-30 20:55:49,702 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:55:49,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:55:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:55:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:55:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 20:55:49,704 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-09-30 20:55:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:49,704 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 20:55:49,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 20:55:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 20:55:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:55:49,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:49,705 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-09-30 20:55:49,706 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:49,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash -56983968, now seen corresponding path program 152 times [2018-09-30 20:55:49,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:49,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:49,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:49,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:49,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:50,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:50,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:50,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:50,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:50,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:50,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:51,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:51,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-30 20:55:51,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 20:55:51,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 20:55:51,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:51,072 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-09-30 20:55:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:52,615 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:55:52,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 20:55:52,616 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-09-30 20:55:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:52,617 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:55:52,617 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:55:52,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:55:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:55:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:55:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 20:55:52,619 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-09-30 20:55:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:52,619 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 20:55:52,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 20:55:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 20:55:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:55:52,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:52,620 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-09-30 20:55:52,620 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:52,620 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1766506874, now seen corresponding path program 153 times [2018-09-30 20:55:52,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:52,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:52,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:52,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:52,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:53,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:53,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:53,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:53,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 20:55:53,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:53,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:54,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:54,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 20:55:54,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 20:55:54,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 20:55:54,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:54,090 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-09-30 20:55:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:55,892 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-09-30 20:55:55,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 20:55:55,892 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-09-30 20:55:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:55,893 INFO L225 Difference]: With dead ends: 160 [2018-09-30 20:55:55,893 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:55:55,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:55:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:55:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:55:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 20:55:55,895 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-09-30 20:55:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:55,895 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 20:55:55,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 20:55:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 20:55:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:55:55,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:55,896 INFO L375 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-09-30 20:55:55,896 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:55,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1072857888, now seen corresponding path program 154 times [2018-09-30 20:55:55,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:55,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:55,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:55,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:56,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:56,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:56,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:56,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:56,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:56,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:57,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:57,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-09-30 20:55:57,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-09-30 20:55:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-09-30 20:55:57,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:57,280 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-09-30 20:55:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:59,151 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:55:59,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 20:55:59,151 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-09-30 20:55:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:59,152 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:55:59,152 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:55:59,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:55:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:55:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 20:55:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 20:55:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 20:55:59,155 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-09-30 20:55:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:59,155 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 20:55:59,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-09-30 20:55:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 20:55:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:55:59,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:59,156 INFO L375 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-09-30 20:55:59,156 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:59,156 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1101147706, now seen corresponding path program 155 times [2018-09-30 20:55:59,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:59,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:59,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:59,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:59,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:00,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:00,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:00,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:56:00,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 20:56:00,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:00,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:00,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:00,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 20:56:00,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 20:56:00,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 20:56:00,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:00,664 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-09-30 20:56:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:02,417 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-09-30 20:56:02,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 20:56:02,417 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-09-30 20:56:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:02,417 INFO L225 Difference]: With dead ends: 162 [2018-09-30 20:56:02,417 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:56:02,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:56:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:56:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:56:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:56:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 20:56:02,420 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-09-30 20:56:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:02,420 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 20:56:02,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 20:56:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 20:56:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:56:02,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:02,420 INFO L375 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-09-30 20:56:02,421 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:02,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 224155616, now seen corresponding path program 156 times [2018-09-30 20:56:02,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:02,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:02,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:02,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:02,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:03,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:03,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:03,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:56:03,627 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:56:03,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:03,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:03,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:03,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-09-30 20:56:03,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-09-30 20:56:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-09-30 20:56:03,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:03,935 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-09-30 20:56:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:05,706 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:56:05,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 20:56:05,706 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-09-30 20:56:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:05,707 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:56:05,707 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 20:56:05,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:56:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 20:56:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 20:56:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:56:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 20:56:05,709 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-09-30 20:56:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:05,709 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 20:56:05,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-09-30 20:56:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 20:56:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:56:05,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:05,732 INFO L375 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-09-30 20:56:05,733 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:05,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1641114362, now seen corresponding path program 157 times [2018-09-30 20:56:05,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:05,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:05,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:06,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:06,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:06,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:56:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:06,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:07,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:07,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 20:56:07,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 20:56:07,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 20:56:07,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:07,174 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-09-30 20:56:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:08,242 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-09-30 20:56:08,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 20:56:08,243 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-09-30 20:56:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:08,243 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:56:08,243 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:56:08,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:56:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:56:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 20:56:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 20:56:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 20:56:08,246 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-09-30 20:56:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:08,246 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 20:56:08,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 20:56:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 20:56:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:56:08,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:08,247 INFO L375 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-09-30 20:56:08,247 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:08,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 665058464, now seen corresponding path program 158 times [2018-09-30 20:56:08,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:08,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:08,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:08,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:56:08,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:09,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:09,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:09,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:56:09,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:56:09,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:09,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:09,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:09,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-09-30 20:56:09,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 20:56:09,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 20:56:09,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:09,707 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-09-30 20:56:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:11,089 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:56:11,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 20:56:11,089 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-09-30 20:56:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:11,090 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:56:11,090 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:56:11,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:56:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:56:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:56:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:56:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 20:56:11,092 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-09-30 20:56:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:11,092 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 20:56:11,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 20:56:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 20:56:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:56:11,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:11,093 INFO L375 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-09-30 20:56:11,093 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:11,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -858027962, now seen corresponding path program 159 times [2018-09-30 20:56:11,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:11,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:11,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:11,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:11,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:12,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:12,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:12,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:56:12,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-09-30 20:56:12,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:12,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:12,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:12,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 20:56:12,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 20:56:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 20:56:12,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:12,728 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-09-30 20:56:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:14,709 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-09-30 20:56:14,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 20:56:14,709 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-09-30 20:56:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:14,710 INFO L225 Difference]: With dead ends: 166 [2018-09-30 20:56:14,710 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:56:14,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:56:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:56:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:56:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:56:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 20:56:14,712 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-09-30 20:56:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:14,712 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 20:56:14,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 20:56:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 20:56:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:56:14,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:14,713 INFO L375 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-09-30 20:56:14,713 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:14,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash -829066912, now seen corresponding path program 160 times [2018-09-30 20:56:14,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:14,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:14,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:14,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:14,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:15,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:15,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:15,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:56:15,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:56:15,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:15,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:16,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:16,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-09-30 20:56:16,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-09-30 20:56:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-09-30 20:56:16,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:16,201 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-09-30 20:56:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:17,785 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 20:56:17,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 20:56:17,786 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-09-30 20:56:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:17,786 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:56:17,786 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 20:56:17,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:56:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 20:56:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 20:56:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 20:56:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 20:56:17,788 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-09-30 20:56:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:17,789 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 20:56:17,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-09-30 20:56:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 20:56:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:56:17,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:17,789 INFO L375 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-09-30 20:56:17,789 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:17,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 68725638, now seen corresponding path program 161 times [2018-09-30 20:56:17,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:17,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:17,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:17,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:17,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:18,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:18,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:18,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:56:19,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 20:56:19,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:19,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:19,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:19,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 20:56:19,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 20:56:19,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 20:56:19,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:19,435 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-09-30 20:56:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:20,661 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-09-30 20:56:20,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 20:56:20,661 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-09-30 20:56:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:20,662 INFO L225 Difference]: With dead ends: 168 [2018-09-30 20:56:20,662 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 20:56:20,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:56:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 20:56:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 20:56:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 20:56:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 20:56:20,665 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-09-30 20:56:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:20,665 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 20:56:20,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 20:56:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 20:56:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 20:56:20,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:20,666 INFO L375 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-09-30 20:56:20,666 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:20,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2130490912, now seen corresponding path program 162 times [2018-09-30 20:56:20,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:20,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:20,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:20,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:20,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:21,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:21,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:21,896 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:56:22,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-09-30 20:56:22,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:22,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:22,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:22,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-09-30 20:56:22,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-09-30 20:56:22,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-09-30 20:56:22,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:22,409 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. Received shutdown request... [2018-09-30 20:56:23,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 20:56:23,536 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:56:23,541 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:56:23,541 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:56:23 BoogieIcfgContainer [2018-09-30 20:56:23,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:56:23,542 INFO L168 Benchmark]: Toolchain (without parser) took 241404.74 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 397.4 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 163.3 MB). Peak memory consumption was 560.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:56:23,544 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:56:23,544 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:56:23,545 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:56:23,545 INFO L168 Benchmark]: RCFGBuilder took 210.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:56:23,546 INFO L168 Benchmark]: TraceAbstraction took 241115.87 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 397.4 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 142.2 MB). Peak memory consumption was 539.6 MB. Max. memory is 7.1 GB. [2018-09-30 20:56:23,548 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 0.22 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 45.76 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 26.49 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 210.35 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 241115.87 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 397.4 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 142.2 MB). Peak memory consumption was 539.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 26). Cancelled while BasicCegarLoop was constructing difference of abstraction (166states) and FLOYD_HOARE automaton (currently 140 states, 165 states before enhancement), while ReachableStatesComputation was computing reachable states (138 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 241.0s OverallTime, 163 OverallIterations, 162 TraceHistogramMax, 99.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 489 SDtfs, 2 SDslu, 7118 SDs, 0 SdLazy, 20621 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27056 GetRequests, 13690 SyntacticMatches, 0 SemanticMatches, 13366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 162 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 14.6s SatisfiabilityAnalysisTime, 118.4s InterpolantComputationTime, 27381 NumberOfCodeBlocks, 27381 NumberOfCodeBlocksAsserted, 3754 NumberOfCheckSat, 27056 ConstructedInterpolants, 0 QuantifiedInterpolants, 8848610 SizeOfPredicates, 162 NumberOfNonLiveVariables, 54270 ConjunctsInSsa, 13527 ConjunctsInUnsatCore, 325 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1443528 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/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-56-23-557.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-56-23-557.csv Completed graceful shutdown