java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:15:55,116 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:15:55,118 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:15:55,137 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:15:55,138 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:15:55,139 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:15:55,143 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:15:55,145 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:15:55,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:15:55,150 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:15:55,154 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 09:15:55,154 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 09:15:55,155 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 09:15:55,156 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 09:15:55,157 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 09:15:55,158 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 09:15:55,159 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 09:15:55,161 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 09:15:55,163 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 09:15:55,165 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 09:15:55,166 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 09:15:55,167 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 09:15:55,170 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 09:15:55,180 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-03 09:15:55,196 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:15:55,196 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:15:55,197 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:15:55,197 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:15:55,197 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:15:55,198 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:15:55,198 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:15:55,198 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:15:55,198 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:15:55,199 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:15:55,199 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:15:55,199 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:15:55,199 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:15:55,199 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:15:55,200 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:15:55,200 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:15:55,200 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:15:55,200 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:15:55,200 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:15:55,201 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:15:55,201 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:15:55,201 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:15:55,201 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:15:55,202 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:15:55,202 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:15:55,202 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:15:55,202 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:15:55,202 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:15:55,203 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:15:55,203 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:15:55,203 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:15:55,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:15:55,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:15:55,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:15:55,289 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:15:55,289 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:15:55,290 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl [2018-10-03 09:15:55,291 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl' [2018-10-03 09:15:55,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:15:55,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:15:55,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:15:55,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:15:55,353 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:15:55,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:15:55,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:15:55,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:15:55,396 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:15:55,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... [2018-10-03 09:15:55,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:15:55,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:15:55,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:15:55,415 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:15:55,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:15:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 09:15:55,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 09:15:55,664 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 09:15:55,664 INFO L202 PluginConnector]: Adding new model simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:15:55 BoogieIcfgContainer [2018-10-03 09:15:55,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:15:55,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:15:55,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:15:55,669 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:15:55,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:15:55" (1/2) ... [2018-10-03 09:15:55,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4481ce55 and model type simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:15:55, skipping insertion in model container [2018-10-03 09:15:55,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:15:55" (2/2) ... [2018-10-03 09:15:55,672 INFO L112 eAbstractionObserver]: Analyzing ICFG simple4.i_3.bpl [2018-10-03 09:15:55,682 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:15:55,690 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:15:55,744 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:15:55,746 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:15:55,746 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:15:55,747 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:15:55,747 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:15:55,747 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:15:55,747 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:15:55,747 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:15:55,747 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:15:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 09:15:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 09:15:55,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:55,773 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 09:15:55,774 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:55,780 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-03 09:15:55,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:55,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:55,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:55,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:15:55,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:55,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:15:55,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 09:15:55,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:15:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:15:55,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:55,986 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 09:15:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:56,018 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-03 09:15:56,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:15:56,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-03 09:15:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:56,032 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:15:56,032 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:15:56,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:15:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:15:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 09:15:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 09:15:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 09:15:56,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-03 09:15:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:56,070 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 09:15:56,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:15:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 09:15:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:15:56,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:56,071 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-03 09:15:56,071 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:56,071 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-03 09:15:56,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:56,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:56,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:56,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:15:56,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:56,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:56,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:56,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:15:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:56,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:56,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:56,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 09:15:56,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:15:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:15:56,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:56,380 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-03 09:15:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:56,440 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 09:15:56,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:15:56,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 09:15:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:56,444 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:15:56,444 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 09:15:56,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-03 09:15:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 09:15:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 09:15:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 09:15:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 09:15:56,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-03 09:15:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:56,454 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 09:15:56,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:15:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 09:15:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:15:56,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:56,456 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-03 09:15:56,457 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:56,457 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-03 09:15:56,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:56,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:56,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:56,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:15:56,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:56,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:56,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:56,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:15:56,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:15:56,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:15:56,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:56,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:56,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 09:15:56,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:15:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:15:56,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:56,759 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-03 09:15:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:56,818 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 09:15:56,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:15:56,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 09:15:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:56,820 INFO L225 Difference]: With dead ends: 13 [2018-10-03 09:15:56,820 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:15:56,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-03 09:15:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:15:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 09:15:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:15:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 09:15:56,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-03 09:15:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:56,825 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 09:15:56,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:15:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 09:15:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 09:15:56,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:56,826 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-03 09:15:56,826 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:56,826 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-03 09:15:56,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:56,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:56,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:56,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:15:56,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:57,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:57,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:57,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:15:57,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 09:15:57,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:15:57,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:57,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:57,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 09:15:57,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:15:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:15:57,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:57,290 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-03 09:15:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:57,346 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 09:15:57,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:15:57,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 09:15:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:57,347 INFO L225 Difference]: With dead ends: 15 [2018-10-03 09:15:57,348 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:15:57,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 4 [2018-10-03 09:15:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:15:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 09:15:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 09:15:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 09:15:57,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-03 09:15:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:57,354 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 09:15:57,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:15:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 09:15:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 09:15:57,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:57,355 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-03 09:15:57,356 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:57,356 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-03 09:15:57,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:57,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:57,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:57,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:15:57,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:57,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:57,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:57,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:15:57,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:15:57,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:15:57,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:57,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:57,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:15:57,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:15:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:15:57,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:57,597 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-03 09:15:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:57,772 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 09:15:57,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 09:15:57,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-03 09:15:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:57,774 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:15:57,774 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 09:15:57,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-03 09:15:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 09:15:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 09:15:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 09:15:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 09:15:57,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-03 09:15:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:57,779 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 09:15:57,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:15:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 09:15:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 09:15:57,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:57,780 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-03 09:15:57,781 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:57,781 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-03 09:15:57,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:57,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:57,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:57,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:15:57,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:57,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:57,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:57,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:15:58,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 09:15:58,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:15:58,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:58,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:58,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 09:15:58,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:15:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:15:58,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:58,204 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-03 09:15:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:58,299 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 09:15:58,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:15:58,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 09:15:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:58,300 INFO L225 Difference]: With dead ends: 19 [2018-10-03 09:15:58,301 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 09:15:58,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-03 09:15:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 09:15:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 09:15:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 09:15:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 09:15:58,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-03 09:15:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:58,307 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 09:15:58,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:15:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 09:15:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 09:15:58,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:58,308 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-03 09:15:58,308 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:58,308 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-03 09:15:58,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:58,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:58,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:58,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:15:58,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:58,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:58,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:58,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:15:58,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 09:15:58,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:15:58,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:58,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:58,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 09:15:58,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:15:58,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:15:58,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:58,994 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-03 09:15:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:59,079 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 09:15:59,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:15:59,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 09:15:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:59,082 INFO L225 Difference]: With dead ends: 21 [2018-10-03 09:15:59,082 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:15:59,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 7 [2018-10-03 09:15:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:15:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 09:15:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:15:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 09:15:59,088 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-03 09:15:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:59,088 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 09:15:59,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:15:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 09:15:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 09:15:59,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:59,089 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-03 09:15:59,089 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:59,090 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-03 09:15:59,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:59,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:59,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:59,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:15:59,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:59,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:15:59,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:15:59,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:15:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:15:59,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:15:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:15:59,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:15:59,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:15:59,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:15:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:15:59,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:15:59,717 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-03 09:15:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:15:59,815 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 09:15:59,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:15:59,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 09:15:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:15:59,816 INFO L225 Difference]: With dead ends: 23 [2018-10-03 09:15:59,816 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 09:15:59,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 8 [2018-10-03 09:15:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 09:15:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 09:15:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 09:15:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 09:15:59,821 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-03 09:15:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:15:59,821 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 09:15:59,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:15:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 09:15:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:15:59,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:15:59,822 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-03 09:15:59,823 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:15:59,823 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:15:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-03 09:15:59,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:15:59,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:15:59,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:59,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:15:59,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:15:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:00,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:00,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:00,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:00,048 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:00,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:00,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:00,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:00,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 09:16:00,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:16:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:16:00,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:00,281 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-03 09:16:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:00,440 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 09:16:00,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:16:00,442 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-03 09:16:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:00,445 INFO L225 Difference]: With dead ends: 25 [2018-10-03 09:16:00,445 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:16:00,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 9 [2018-10-03 09:16:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:16:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 09:16:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 09:16:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 09:16:00,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-03 09:16:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:00,452 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 09:16:00,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:16:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 09:16:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 09:16:00,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:00,453 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-03 09:16:00,453 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:00,453 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-03 09:16:00,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:00,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:00,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:00,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:00,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:00,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:00,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:00,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:00,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 09:16:00,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:00,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:00,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:00,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 09:16:00,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:16:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:16:00,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:00,935 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-03 09:16:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:01,149 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 09:16:01,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:16:01,149 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 09:16:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:01,150 INFO L225 Difference]: With dead ends: 27 [2018-10-03 09:16:01,150 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 09:16:01,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-03 09:16:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 09:16:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 09:16:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:16:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 09:16:01,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-03 09:16:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:01,156 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 09:16:01,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:16:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 09:16:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 09:16:01,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:01,157 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-03 09:16:01,158 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:01,158 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-03 09:16:01,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:01,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:01,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:01,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:01,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:01,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:01,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:01,404 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:01,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:01,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:01,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:01,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 09:16:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 09:16:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 09:16:01,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:01,766 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-03 09:16:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:02,039 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 09:16:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:16:02,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-03 09:16:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:02,040 INFO L225 Difference]: With dead ends: 29 [2018-10-03 09:16:02,041 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:16:02,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 11 [2018-10-03 09:16:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:16:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 09:16:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 09:16:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 09:16:02,046 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-03 09:16:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:02,047 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 09:16:02,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 09:16:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 09:16:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:16:02,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:02,048 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-03 09:16:02,048 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:02,049 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-03 09:16:02,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:02,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:02,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:02,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:02,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:02,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:02,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:02,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:29,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 09:17:29,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:30,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:30,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:30,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 09:17:30,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:17:30,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:17:30,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:30,593 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-03 09:17:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:30,784 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 09:17:30,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:17:30,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 09:17:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:30,786 INFO L225 Difference]: With dead ends: 31 [2018-10-03 09:17:30,786 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 09:17:30,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 12 [2018-10-03 09:17:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 09:17:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 09:17:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 09:17:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 09:17:30,791 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-03 09:17:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:30,791 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 09:17:30,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:17:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 09:17:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 09:17:30,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:30,792 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-03 09:17:30,793 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:30,793 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-03 09:17:30,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:30,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:30,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:30,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:30,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:31,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:31,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:31,028 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:31,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 09:17:31,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:31,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:31,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:31,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 09:17:31,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:17:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:17:31,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:31,820 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-03 09:17:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:31,991 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 09:17:31,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:17:31,992 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-03 09:17:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:31,992 INFO L225 Difference]: With dead ends: 33 [2018-10-03 09:17:31,992 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:17:31,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 13 [2018-10-03 09:17:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:17:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 09:17:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:17:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 09:17:31,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-03 09:17:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:31,999 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 09:17:31,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:17:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 09:17:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 09:17:32,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:32,000 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-03 09:17:32,000 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:32,000 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-03 09:17:32,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:32,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:32,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:32,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:32,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:32,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:32,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:32,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:32,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:32,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:32,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:17:32,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:17:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:17:32,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:32,661 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-03 09:17:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:32,930 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 09:17:32,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:17:32,930 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 09:17:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:32,931 INFO L225 Difference]: With dead ends: 35 [2018-10-03 09:17:32,931 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 09:17:32,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 14 [2018-10-03 09:17:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 09:17:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 09:17:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 09:17:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 09:17:32,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-03 09:17:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:32,937 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 09:17:32,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:17:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 09:17:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 09:17:32,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:32,939 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-03 09:17:32,939 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:32,939 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-03 09:17:32,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:32,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:32,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:32,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:32,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:33,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:33,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:33,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:33,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:33,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:33,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:34,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:34,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 09:17:34,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:17:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:17:34,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:34,011 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-03 09:17:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:34,288 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 09:17:34,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:17:34,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-03 09:17:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:34,289 INFO L225 Difference]: With dead ends: 37 [2018-10-03 09:17:34,290 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 09:17:34,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 15 [2018-10-03 09:17:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 09:17:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 09:17:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 09:17:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 09:17:34,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-03 09:17:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:34,296 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 09:17:34,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:17:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 09:17:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 09:17:34,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:34,298 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-03 09:17:34,298 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:34,298 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-03 09:17:34,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:34,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:34,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:34,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:34,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:34,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:34,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:34,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:35,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 09:17:35,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:35,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:35,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:35,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 09:17:35,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:17:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:17:35,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:35,915 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-03 09:17:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:36,149 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 09:17:36,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:17:36,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 09:17:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:36,151 INFO L225 Difference]: With dead ends: 39 [2018-10-03 09:17:36,151 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 09:17:36,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 16 [2018-10-03 09:17:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 09:17:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 09:17:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 09:17:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 09:17:36,157 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-03 09:17:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:36,157 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 09:17:36,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:17:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 09:17:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 09:17:36,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:36,158 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-03 09:17:36,158 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:36,158 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-03 09:17:36,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:36,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:36,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:36,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:36,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:36,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:36,510 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:36,530 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:36,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:36,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:36,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:36,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 09:17:36,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:17:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:17:36,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:36,719 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-03 09:17:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:36,978 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 09:17:36,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:17:36,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-03 09:17:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:36,982 INFO L225 Difference]: With dead ends: 41 [2018-10-03 09:17:36,982 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 09:17:36,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-03 09:17:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 09:17:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 09:17:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 09:17:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 09:17:36,988 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-03 09:17:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:36,988 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 09:17:36,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:17:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 09:17:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 09:17:36,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:36,989 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-03 09:17:36,990 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:36,990 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-03 09:17:36,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:36,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:36,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:36,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:37,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:37,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown