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.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:49:09,023 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:49:09,025 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:49:09,041 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:49:09,043 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:49:09,044 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:49:09,045 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:49:09,048 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:49:09,051 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:49:09,052 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:49:09,054 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:49:09,054 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:49:09,055 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:49:09,056 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:49:09,057 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:49:09,063 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:49:09,064 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:49:09,070 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:49:09,072 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:49:09,076 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:49:09,077 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:49:09,079 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:49:09,083 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-03 08:49:09,083 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-03 08:49:09,084 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-03 08:49:09,086 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-03 08:49:09,087 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-03 08:49:09,089 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-03 08:49:09,090 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-03 08:49:09,090 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-03 08:49:09,091 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-03 08:49:09,091 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-03 08:49:09,091 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-03 08:49:09,092 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-03 08:49:09,095 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-03 08:49:09,096 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-03 08:49:09,096 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:49:09,123 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:49:09,123 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:49:09,124 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:49:09,124 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:49:09,125 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:49:09,125 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:49:09,125 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:49:09,128 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:49:09,128 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:49:09,128 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:49:09,128 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:49:09,129 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:49:09,129 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:49:09,129 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:49:09,129 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:49:09,129 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:49:09,129 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:49:09,130 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:49:09,130 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:49:09,130 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:49:09,130 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:49:09,131 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:49:09,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:49:09,132 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:49:09,132 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:49:09,132 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:49:09,132 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:49:09,132 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:49:09,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:49:09,133 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:49:09,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:49:09,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:49:09,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:49:09,225 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:49:09,226 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:49:09,227 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-10-03 08:49:09,227 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-10-03 08:49:09,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:49:09,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:49:09,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:49:09,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:49:09,304 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:49:09,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:49:09,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:49:09,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:49:09,345 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:49:09,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/1) ... [2018-10-03 08:49:09,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:49:09,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:49:09,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:49:09,371 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:49:09,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (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 08:49:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:49:09,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:49:09,729 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:49:09,730 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:49:09 BoogieIcfgContainer [2018-10-03 08:49:09,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:49:09,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:49:09,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:49:09,734 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:49:09,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:09" (1/2) ... [2018-10-03 08:49:09,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51edf682 and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:49:09, skipping insertion in model container [2018-10-03 08:49:09,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:49:09" (2/2) ... [2018-10-03 08:49:09,738 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-10-03 08:49:09,748 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:49:09,757 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:49:09,806 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:49:09,807 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:49:09,807 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:49:09,807 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:49:09,807 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:49:09,808 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:49:09,808 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:49:09,808 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:49:09,808 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:49:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-03 08:49:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:49:09,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:09,829 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:49:09,830 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:09,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:09,837 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-03 08:49:09,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:09,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:09,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:09,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:09,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:10,077 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 08:49:10,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:49:10,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:49:10,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:49:10,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:49:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:49:10,104 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-03 08:49:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:10,251 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-03 08:49:10,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:49:10,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:49:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:10,263 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:49:10,263 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:49:10,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:49:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:49:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:49:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:49:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-03 08:49:10,304 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-03 08:49:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:10,305 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-03 08:49:10,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:49:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-03 08:49:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:49:10,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:10,306 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:10,306 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:10,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-10-03 08:49:10,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:10,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:10,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:10,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:10,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:10,392 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:49:10,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 08:49:10,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:49:10,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:49:10,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:49:10,395 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-03 08:49:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:10,513 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-03 08:49:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:49:10,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:49:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:10,515 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:49:10,515 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:49:10,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:49:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:49:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-03 08:49:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:49:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-03 08:49:10,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-03 08:49:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:10,522 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-03 08:49:10,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:49:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-03 08:49:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:49:10,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:10,523 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:10,523 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:10,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-03 08:49:10,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:10,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:10,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:10,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:10,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:10,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:10,737 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 08:49:10,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:10,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:11,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:11,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-03 08:49:11,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:49:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:49:11,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:49:11,275 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-10-03 08:49:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:11,651 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-03 08:49:11,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:49:11,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 08:49:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:11,655 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:49:11,655 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:49:11,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:49:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:49:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:49:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:49:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-03 08:49:11,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-03 08:49:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:11,663 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-03 08:49:11,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:49:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-03 08:49:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:49:11,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:11,664 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 08:49:11,665 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:11,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-10-03 08:49:11,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:11,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:11,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:11,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:11,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:11,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:11,812 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 08:49:11,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:11,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:11,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:11,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:11,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:11,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-03 08:49:11,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:49:11,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:49:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:49:11,907 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-03 08:49:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:12,065 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-03 08:49:12,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:49:12,065 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-03 08:49:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:12,067 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:49:12,067 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:49:12,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:49:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:49:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-03 08:49:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:49:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-03 08:49:12,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-03 08:49:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:12,075 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-03 08:49:12,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:49:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-03 08:49:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:49:12,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:12,076 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-03 08:49:12,076 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:12,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-10-03 08:49:12,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:12,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:12,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:12,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:12,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:12,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:12,521 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 08:49:12,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:12,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:49:12,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:12,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:12,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:12,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-03 08:49:12,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:49:12,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:49:12,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:49:12,778 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-10-03 08:49:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:13,002 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-03 08:49:13,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:49:13,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 08:49:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:13,004 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:49:13,005 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:49:13,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:49:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:49:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:49:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:49:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-03 08:49:13,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-03 08:49:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:13,010 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-03 08:49:13,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:49:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-03 08:49:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:49:13,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:13,012 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-03 08:49:13,012 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:13,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-10-03 08:49:13,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:13,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:13,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:13,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:13,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:13,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:13,140 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 08:49:13,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:13,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:13,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:13,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:13,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:13,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-03 08:49:13,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:49:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:49:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:49:13,218 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-03 08:49:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:13,407 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-03 08:49:13,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:49:13,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:49:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:13,409 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:49:13,409 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:49:13,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:49:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:49:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-03 08:49:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:49:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-03 08:49:13,415 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-03 08:49:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:13,415 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-03 08:49:13,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:49:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-03 08:49:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:49:13,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:13,417 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-03 08:49:13,417 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:13,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-10-03 08:49:13,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:13,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:13,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:13,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:13,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:13,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:13,723 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 08:49:13,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:13,785 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:49:13,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:13,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:14,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:14,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-03 08:49:14,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:49:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:49:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:49:14,014 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-10-03 08:49:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:14,179 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-03 08:49:14,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:49:14,180 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 08:49:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:14,180 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:49:14,181 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:49:14,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:49:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:49:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:49:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:49:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-03 08:49:14,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-03 08:49:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:14,187 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-03 08:49:14,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:49:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-03 08:49:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:49:14,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:14,188 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-03 08:49:14,189 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:14,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-10-03 08:49:14,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:14,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:14,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:14,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:14,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:14,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:14,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:49:14,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:14,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 08:49:14,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:14,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:14,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:14,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-03 08:49:14,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:49:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:49:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:49:14,422 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-03 08:49:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:14,546 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-03 08:49:14,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:49:14,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-03 08:49:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:14,548 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:49:14,548 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:49:14,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:49:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:49:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-03 08:49:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:49:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-03 08:49:14,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-03 08:49:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:14,555 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-03 08:49:14,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:49:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-03 08:49:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:49:14,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:14,556 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-03 08:49:14,557 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:14,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-10-03 08:49:14,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:14,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:14,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:14,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:14,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:14,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:14,718 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 08:49:14,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:14,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:15,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:15,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-03 08:49:15,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:49:15,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:49:15,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:49:15,034 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-10-03 08:49:15,441 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-03 08:49:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:15,443 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-03 08:49:15,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:49:15,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 08:49:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:15,444 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:49:15,445 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:49:15,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:49:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:49:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:49:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:49:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-03 08:49:15,451 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-03 08:49:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:15,452 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-03 08:49:15,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:49:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-03 08:49:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:49:15,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:15,453 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-03 08:49:15,453 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:15,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-10-03 08:49:15,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:15,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:15,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:15,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:15,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:49:15,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:15,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:15,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:15,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:15,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:15,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-03 08:49:15,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:49:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:49:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:49:15,667 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-03 08:49:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:16,079 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-03 08:49:16,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:49:16,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-03 08:49:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:16,081 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:49:16,081 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:49:16,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:49:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:49:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-03 08:49:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:49:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-03 08:49:16,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-03 08:49:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:16,088 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-03 08:49:16,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:49:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-03 08:49:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:49:16,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:16,089 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-03 08:49:16,090 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:16,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-10-03 08:49:16,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:16,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:16,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:16,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:16,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:16,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:16,535 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 08:49:16,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:16,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:49:16,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:16,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:16,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:16,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-03 08:49:16,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:49:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:49:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:49:16,974 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-10-03 08:49:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:17,515 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-03 08:49:17,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:49:17,515 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 08:49:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:17,516 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:49:17,516 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:49:17,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:49:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:49:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:49:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:49:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-03 08:49:17,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-03 08:49:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:17,523 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-03 08:49:17,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:49:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-03 08:49:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:49:17,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:17,524 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-03 08:49:17,524 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:17,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-10-03 08:49:17,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:17,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:17,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:17,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:17,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:17,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:17,705 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 08:49:17,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:17,743 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:17,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:17,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:17,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:17,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-03 08:49:17,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:49:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:49:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:49:17,787 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-03 08:49:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:18,048 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-03 08:49:18,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:49:18,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-03 08:49:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:18,056 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:49:18,056 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:49:18,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:49:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:49:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-03 08:49:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:49:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-03 08:49:18,063 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-03 08:49:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:18,063 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-03 08:49:18,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:49:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-03 08:49:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:49:18,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:18,065 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-03 08:49:18,065 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:18,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-10-03 08:49:18,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:18,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:18,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:18,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:18,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:49:18,469 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:18,511 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:49:18,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:18,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:18,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:18,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-03 08:49:18,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:49:18,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:49:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:49:18,957 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-10-03 08:49:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:19,226 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-03 08:49:19,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:49:19,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 08:49:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:19,227 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:49:19,227 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:49:19,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:49:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:49:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:49:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:49:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-03 08:49:19,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-03 08:49:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:19,234 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-03 08:49:19,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:49:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-03 08:49:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:49:19,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:19,235 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-03 08:49:19,236 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:19,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:19,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-10-03 08:49:19,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:19,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:19,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:19,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:19,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:19,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:19,552 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 08:49:19,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:19,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:49:19,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:19,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:19,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:19,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-03 08:49:19,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:49:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:49:19,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:49:19,634 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-03 08:49:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:19,997 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-03 08:49:19,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:49:19,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-03 08:49:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:19,999 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:49:19,999 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:49:20,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:49:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:49:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-03 08:49:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:49:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-03 08:49:20,007 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-03 08:49:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:20,007 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-03 08:49:20,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:49:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-03 08:49:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:49:20,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:20,008 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-03 08:49:20,009 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:20,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-10-03 08:49:20,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:20,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:20,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:20,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:20,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:20,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:20,224 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 08:49:20,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:20,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:20,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:20,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-03 08:49:20,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:49:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:49:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:49:20,583 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-10-03 08:49:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:20,901 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-03 08:49:20,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:49:20,901 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-03 08:49:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:20,902 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:49:20,902 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:49:20,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:49:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:49:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:49:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:49:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-03 08:49:20,910 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-03 08:49:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:20,910 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-03 08:49:20,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:49:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-03 08:49:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:49:20,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:20,911 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-03 08:49:20,911 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:20,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-10-03 08:49:20,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:20,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:20,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:20,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:20,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:21,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:21,070 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 08:49:21,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:21,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:21,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:21,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:21,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:21,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-03 08:49:21,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:49:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:49:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:49:21,223 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-03 08:49:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:21,785 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-03 08:49:21,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:49:21,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-03 08:49:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:21,788 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:49:21,788 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:49:21,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:49:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:49:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-03 08:49:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:49:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-03 08:49:21,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-03 08:49:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:21,798 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-03 08:49:21,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:49:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-03 08:49:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:49:21,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:21,799 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-03 08:49:21,799 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:21,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-10-03 08:49:21,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:21,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:21,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:21,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:21,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:22,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:22,146 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 08:49:22,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:22,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:49:22,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:22,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:22,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:22,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-03 08:49:22,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:49:22,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:49:22,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:49:22,673 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-10-03 08:49:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:23,624 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-03 08:49:23,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:49:23,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-03 08:49:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:23,625 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:49:23,625 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:49:23,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=1693, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:49:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:49:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:49:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:49:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-03 08:49:23,633 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-03 08:49:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:23,633 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-03 08:49:23,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:49:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-03 08:49:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:49:23,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:23,634 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-03 08:49:23,634 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:23,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-10-03 08:49:23,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:23,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:23,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:23,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:23,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:23,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:23,967 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 08:49:23,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:24,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:24,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:24,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:24,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:24,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-03 08:49:24,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:49:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:49:24,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:49:24,064 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-03 08:49:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:24,238 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-03 08:49:24,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:49:24,239 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-03 08:49:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:24,240 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:49:24,240 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:49:24,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:49:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:49:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-03 08:49:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:49:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-03 08:49:24,249 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-03 08:49:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:24,250 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-03 08:49:24,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:49:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-03 08:49:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:49:24,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:24,251 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-03 08:49:24,251 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:24,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-10-03 08:49:24,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:24,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:24,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:24,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:25,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:25,207 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 08:49:25,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:25,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:49:25,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:25,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:25,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:25,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-03 08:49:25,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:49:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:49:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:49:25,882 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-10-03 08:49:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:26,232 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-03 08:49:26,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:49:26,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-03 08:49:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:26,233 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:49:26,233 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:49:26,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:49:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:49:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:49:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:49:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-03 08:49:26,243 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-03 08:49:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:26,243 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-03 08:49:26,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:49:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-03 08:49:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:49:26,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:26,244 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-03 08:49:26,244 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:26,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-10-03 08:49:26,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:26,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:26,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:26,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:26,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:26,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:26,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:26,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:26,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-03 08:49:26,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:26,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:26,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:26,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-03 08:49:26,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:49:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:49:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:49:26,560 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-03 08:49:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:26,752 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-03 08:49:26,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:49:26,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-03 08:49:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:26,753 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:49:26,753 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:49:26,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:49:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:49:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-03 08:49:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:49:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-03 08:49:26,762 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-03 08:49:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:26,762 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-03 08:49:26,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:49:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-03 08:49:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:49:26,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:26,763 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-03 08:49:26,763 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:26,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-10-03 08:49:26,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:26,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:26,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:26,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:26,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:27,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:27,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:27,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:27,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:28,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:28,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-03 08:49:28,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:49:28,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:49:28,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:49:28,448 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-10-03 08:49:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:28,896 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-03 08:49:28,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:49:28,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-03 08:49:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:28,896 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:49:28,897 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:49:28,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=672, Invalid=2520, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:49:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:49:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:49:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:49:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-03 08:49:28,905 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-03 08:49:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:28,906 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-03 08:49:28,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:49:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-03 08:49:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:49:28,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:28,907 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-03 08:49:28,907 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:28,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-10-03 08:49:28,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:28,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:28,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:29,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:29,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:29,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:29,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:29,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:29,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:29,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:29,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-03 08:49:29,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:49:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:49:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:49:29,189 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-03 08:49:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:29,486 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-03 08:49:29,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:49:29,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-03 08:49:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:29,490 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:49:29,490 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:49:29,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:49:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:49:29,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-03 08:49:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:49:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-03 08:49:29,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-03 08:49:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:29,502 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-03 08:49:29,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:49:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-03 08:49:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:49:29,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:29,503 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-03 08:49:29,503 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:29,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-10-03 08:49:29,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:29,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:29,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:30,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:30,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:30,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:30,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:49:30,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:30,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:31,498 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-03 08:49:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:31,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:31,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-03 08:49:31,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:49:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:49:31,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1933, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:49:31,852 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-10-03 08:49:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:32,318 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-03 08:49:32,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:49:32,319 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-03 08:49:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:32,319 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:49:32,319 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:49:32,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=787, Invalid=2995, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:49:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:49:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:49:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:49:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-03 08:49:32,328 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-03 08:49:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:32,329 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-03 08:49:32,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:49:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-03 08:49:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:49:32,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:32,329 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-03 08:49:32,330 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:32,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-10-03 08:49:32,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:32,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:32,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:32,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:32,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:32,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:32,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:32,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:32,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:32,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:32,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-03 08:49:32,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:49:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:49:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:49:32,778 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-03 08:49:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:33,117 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-03 08:49:33,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:49:33,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-03 08:49:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:33,118 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:49:33,118 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:49:33,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:49:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:49:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-03 08:49:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:49:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-03 08:49:33,127 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-03 08:49:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:33,127 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-03 08:49:33,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:49:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-03 08:49:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:49:33,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:33,128 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-03 08:49:33,128 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:33,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-10-03 08:49:33,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:33,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:33,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:33,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:33,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:33,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:33,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:33,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:33,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:49:33,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:33,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:34,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:34,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-03 08:49:34,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:49:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:49:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:49:34,377 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-10-03 08:49:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:34,880 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-03 08:49:34,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:49:34,881 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-03 08:49:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:34,881 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:49:34,881 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:49:34,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:49:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:49:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:49:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:49:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-03 08:49:34,889 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-03 08:49:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:34,889 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-03 08:49:34,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:49:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-03 08:49:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:49:34,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:34,890 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-03 08:49:34,890 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:34,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:34,890 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-10-03 08:49:34,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:34,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:34,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:35,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:35,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:35,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:35,955 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-03 08:49:35,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:35,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:36,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:36,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-03 08:49:36,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:49:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:49:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:49:36,018 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-03 08:49:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:36,271 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-03 08:49:36,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:49:36,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-03 08:49:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:36,272 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:49:36,273 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:49:36,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:49:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:49:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-03 08:49:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:49:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-03 08:49:36,282 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-03 08:49:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:36,282 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-03 08:49:36,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:49:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-03 08:49:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:49:36,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:36,283 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-03 08:49:36,283 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:36,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-10-03 08:49:36,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:36,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:36,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:36,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:36,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:36,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:36,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:36,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:36,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:37,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:37,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-03 08:49:37,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:49:37,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:49:37,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=2619, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:49:37,511 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-10-03 08:49:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:38,259 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-03 08:49:38,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:49:38,259 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-03 08:49:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:38,260 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:49:38,260 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:49:38,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1044, Invalid=4068, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:49:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:49:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:49:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:49:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-03 08:49:38,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-03 08:49:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:38,268 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-03 08:49:38,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:49:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-03 08:49:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:49:38,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:38,269 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-03 08:49:38,269 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:38,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-10-03 08:49:38,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:38,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:38,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:38,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:38,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:38,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:38,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:38,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:38,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:38,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:38,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:38,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:38,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-03 08:49:38,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:49:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:49:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:49:38,966 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-03 08:49:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:39,283 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-03 08:49:39,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:49:39,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-03 08:49:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:39,284 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:49:39,284 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:49:39,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:49:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:49:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-03 08:49:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:49:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-03 08:49:39,293 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-03 08:49:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:39,293 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-03 08:49:39,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:49:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-03 08:49:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:49:39,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:39,294 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-03 08:49:39,294 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:39,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-10-03 08:49:39,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:39,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:39,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:39,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:39,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:39,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:39,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:39,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:39,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:49:39,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:39,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:41,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:41,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-03 08:49:41,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:49:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:49:41,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:49:41,127 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-10-03 08:49:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:42,238 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-03 08:49:42,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:49:42,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-03 08:49:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:42,239 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:49:42,239 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:49:42,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1186, Invalid=4666, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:49:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:49:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:49:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:49:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-03 08:49:42,249 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-03 08:49:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:42,249 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-03 08:49:42,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:49:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-03 08:49:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:49:42,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:42,250 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-03 08:49:42,250 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:42,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-10-03 08:49:42,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:42,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:42,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:42,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:42,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:42,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:42,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:42,522 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:42,560 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:42,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:42,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:42,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:42,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-03 08:49:42,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:49:42,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:49:42,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:49:42,707 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-03 08:49:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:43,002 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-03 08:49:43,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:49:43,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-03 08:49:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:43,003 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:49:43,003 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:49:43,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:49:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:49:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-03 08:49:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:49:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-03 08:49:43,014 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-03 08:49:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:43,014 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-03 08:49:43,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:49:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-03 08:49:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:49:43,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:43,015 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-03 08:49:43,015 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:43,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:43,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-10-03 08:49:43,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:43,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:43,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:43,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:43,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:43,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:43,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:43,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:43,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:49:43,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:43,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:44,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:44,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-03 08:49:44,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:49:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:49:44,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:49:44,871 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-10-03 08:49:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:45,850 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-03 08:49:45,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:49:45,850 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-03 08:49:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:45,851 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:49:45,851 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:49:45,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1337, Invalid=5305, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:49:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:49:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:49:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:49:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-03 08:49:45,864 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-03 08:49:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:45,864 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-03 08:49:45,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:49:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-03 08:49:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:49:45,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:45,865 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-03 08:49:45,865 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:45,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-10-03 08:49:45,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:45,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:45,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:45,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:45,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:46,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:46,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:46,265 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:46,400 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-03 08:49:46,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:46,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:46,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:46,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-03 08:49:46,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:49:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:49:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:49:46,446 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-03 08:49:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:46,742 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-03 08:49:46,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:49:46,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-03 08:49:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:46,744 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:49:46,744 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:49:46,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:49:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:49:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-03 08:49:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:49:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-03 08:49:46,756 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-03 08:49:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:46,756 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-03 08:49:46,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:49:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-03 08:49:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:49:46,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:46,757 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-03 08:49:46,757 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:46,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-10-03 08:49:46,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:46,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:46,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:46,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:46,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:47,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:47,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:47,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:47,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:48,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:48,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-03 08:49:48,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:49:48,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:49:48,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3843, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:49:48,270 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-10-03 08:49:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:49,672 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-03 08:49:49,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:49:49,673 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-03 08:49:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:49,673 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:49:49,673 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:49:49,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1497, Invalid=5985, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:49:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:49:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:49:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:49:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-03 08:49:49,685 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-03 08:49:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:49,685 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-03 08:49:49,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:49:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-03 08:49:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:49:49,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:49,685 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-03 08:49:49,686 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:49,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-10-03 08:49:49,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:49,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:49,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:49,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:49,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:50,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:50,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:50,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:50,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:50,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:50,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:50,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:50,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-03 08:49:50,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:49:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:49:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:49:50,517 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-03 08:49:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:50,852 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-03 08:49:50,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:49:50,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-03 08:49:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:50,853 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:49:50,853 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:49:50,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:49:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:49:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-03 08:49:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:49:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-03 08:49:50,864 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-03 08:49:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:50,864 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-03 08:49:50,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:49:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-03 08:49:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:49:50,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:50,865 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-03 08:49:50,865 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:50,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-10-03 08:49:50,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:50,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:50,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:50,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:50,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:52,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:52,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:52,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:52,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:49:52,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:52,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:53,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:53,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-03 08:49:53,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:49:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:49:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=4303, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:49:53,884 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-10-03 08:49:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:55,201 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-03 08:49:55,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:49:55,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-03 08:49:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:55,202 INFO L225 Difference]: With dead ends: 116 [2018-10-03 08:49:55,202 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:49:55,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1666, Invalid=6706, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:49:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:49:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:49:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:49:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-03 08:49:55,213 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-03 08:49:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:55,214 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-03 08:49:55,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:49:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-03 08:49:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:49:55,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:55,214 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-03 08:49:55,215 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:55,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-10-03 08:49:55,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:55,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:55,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:55,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:55,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:55,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:55,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:55,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:55,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:55,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:55,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:55,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:55,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-03 08:49:55,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:49:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:49:55,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:49:55,615 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-03 08:49:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:55,974 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-03 08:49:55,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:49:55,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-03 08:49:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:55,976 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:49:55,976 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:49:55,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:49:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:49:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-03 08:49:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:49:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-03 08:49:55,991 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-03 08:49:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:55,992 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-03 08:49:55,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:49:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-03 08:49:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:49:55,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:55,992 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-03 08:49:55,993 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:55,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-10-03 08:49:55,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:55,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:55,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:55,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:55,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:56,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:56,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:56,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:56,721 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:49:56,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:56,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:57,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:57,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-03 08:49:57,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:49:57,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:49:57,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=4789, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:49:57,895 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-10-03 08:49:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:58,914 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-03 08:49:58,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:49:58,914 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-03 08:49:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:58,915 INFO L225 Difference]: With dead ends: 122 [2018-10-03 08:49:58,915 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:49:58,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1844, Invalid=7468, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:49:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:49:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:49:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:49:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-03 08:49:58,930 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-03 08:49:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:58,930 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-03 08:49:58,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:49:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-03 08:49:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:49:58,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:58,931 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-03 08:49:58,931 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:58,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-10-03 08:49:58,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:58,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:58,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:58,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:58,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:59,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:59,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:59,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:59,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 08:49:59,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:59,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:59,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:59,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-03 08:49:59,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:49:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:49:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:49:59,415 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-03 08:49:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:59,956 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-03 08:49:59,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:49:59,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-03 08:49:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:59,957 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:49:59,957 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:49:59,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:49:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:49:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-03 08:49:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:49:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-03 08:49:59,973 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-03 08:49:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:59,973 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-03 08:49:59,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:49:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-03 08:49:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:49:59,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:59,974 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-03 08:49:59,974 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:59,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-10-03 08:49:59,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:59,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:59,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:59,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:59,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:01,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:01,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:01,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:01,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:02,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:02,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-03 08:50:02,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:50:02,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:50:02,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1341, Invalid=5301, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:50:02,520 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-10-03 08:50:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:03,952 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-03 08:50:03,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:50:03,952 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-03 08:50:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:03,953 INFO L225 Difference]: With dead ends: 128 [2018-10-03 08:50:03,953 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:50:03,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2031, Invalid=8271, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:50:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:50:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:50:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:50:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-03 08:50:03,965 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-03 08:50:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:03,966 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-03 08:50:03,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:50:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-03 08:50:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:50:03,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:03,966 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-03 08:50:03,966 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:03,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-10-03 08:50:03,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:03,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:03,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:03,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:03,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:04,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:04,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:04,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:04,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:04,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:04,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:04,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:04,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-03 08:50:04,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:50:04,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:50:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:50:04,695 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-03 08:50:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:05,103 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-03 08:50:05,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:50:05,104 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-03 08:50:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:05,104 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:50:05,105 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:50:05,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:50:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:50:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-03 08:50:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:50:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-03 08:50:05,121 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-03 08:50:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:05,121 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-03 08:50:05,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:50:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-03 08:50:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:50:05,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:05,122 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-03 08:50:05,122 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:05,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-10-03 08:50:05,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:05,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:05,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:05,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:05,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:05,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:05,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:50:05,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:05,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:07,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:07,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-03 08:50:07,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:50:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:50:07,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1471, Invalid=5839, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:50:07,258 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-10-03 08:50:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:08,461 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-03 08:50:08,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:50:08,461 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-03 08:50:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:08,462 INFO L225 Difference]: With dead ends: 134 [2018-10-03 08:50:08,462 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:50:08,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2227, Invalid=9115, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:50:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:50:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:50:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:50:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-03 08:50:08,475 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-03 08:50:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:08,475 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-03 08:50:08,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:50:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-03 08:50:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:50:08,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:08,476 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-03 08:50:08,476 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:08,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-10-03 08:50:08,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:08,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:08,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:08,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:08,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:08,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:08,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:08,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:09,014 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:09,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:09,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:09,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:09,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-03 08:50:09,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:50:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:50:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:50:09,080 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-03 08:50:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:09,701 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-03 08:50:09,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:50:09,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-03 08:50:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:09,702 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:50:09,702 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:50:09,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:50:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:50:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-03 08:50:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:50:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-03 08:50:09,716 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-03 08:50:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:09,716 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-03 08:50:09,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:50:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-03 08:50:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:50:09,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:09,717 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-03 08:50:09,717 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:09,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-10-03 08:50:09,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:09,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:09,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:09,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:09,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:10,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:10,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:10,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:10,592 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:50:10,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:10,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:13,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:13,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-03 08:50:13,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:50:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:50:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=6403, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:50:13,193 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-10-03 08:50:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:14,618 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-03 08:50:14,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:50:14,618 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-03 08:50:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:14,619 INFO L225 Difference]: With dead ends: 140 [2018-10-03 08:50:14,619 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:50:14,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2432, Invalid=10000, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:50:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:50:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:50:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:50:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-03 08:50:14,638 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-03 08:50:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:14,638 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-03 08:50:14,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:50:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-03 08:50:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:50:14,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:14,639 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-03 08:50:14,639 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:14,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-10-03 08:50:14,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:14,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:14,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:14,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:14,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:15,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:15,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:15,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:15,113 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-03 08:50:15,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:15,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:15,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:15,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-03 08:50:15,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:50:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:50:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:50:15,231 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-03 08:50:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:15,656 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-03 08:50:15,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:50:15,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-03 08:50:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:15,657 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:50:15,657 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:50:15,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:50:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:50:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-03 08:50:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:50:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-03 08:50:15,672 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-03 08:50:15,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:15,673 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-03 08:50:15,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:50:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-03 08:50:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:50:15,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:15,674 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-03 08:50:15,674 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:15,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-10-03 08:50:15,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:15,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:15,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:15,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:15,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:16,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:16,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:16,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:16,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:18,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:18,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-03 08:50:18,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:50:18,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:50:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=6993, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:50:18,199 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-10-03 08:50:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:20,230 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-03 08:50:20,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:50:20,230 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-03 08:50:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:20,231 INFO L225 Difference]: With dead ends: 146 [2018-10-03 08:50:20,231 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:50:20,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4786 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2646, Invalid=10926, Unknown=0, NotChecked=0, Total=13572 [2018-10-03 08:50:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:50:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:50:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:50:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-03 08:50:20,246 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-03 08:50:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:20,246 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-03 08:50:20,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:50:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-03 08:50:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:50:20,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:20,247 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-03 08:50:20,248 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:20,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-10-03 08:50:20,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:20,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:20,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:20,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:20,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:20,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:20,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:20,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:20,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:20,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:20,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:20,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:20,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-03 08:50:20,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:50:20,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:50:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:50:20,892 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-03 08:50:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:21,344 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-03 08:50:21,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:50:21,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-03 08:50:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:21,346 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:50:21,346 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:50:21,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:50:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:50:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-03 08:50:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:50:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-03 08:50:21,361 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-03 08:50:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:21,361 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-03 08:50:21,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:50:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-03 08:50:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:50:21,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:21,362 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-03 08:50:21,362 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:21,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-10-03 08:50:21,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:21,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:21,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:21,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:21,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:22,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:22,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:22,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:22,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:50:22,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:22,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:24,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:24,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-03 08:50:24,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:50:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:50:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=7609, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:50:24,676 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-10-03 08:50:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:26,310 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-03 08:50:26,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:50:26,310 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-03 08:50:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:26,311 INFO L225 Difference]: With dead ends: 152 [2018-10-03 08:50:26,311 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:50:26,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2869, Invalid=11893, Unknown=0, NotChecked=0, Total=14762 [2018-10-03 08:50:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:50:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:50:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:50:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-03 08:50:26,332 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-03 08:50:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:26,332 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-03 08:50:26,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:50:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-03 08:50:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:50:26,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:26,333 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-03 08:50:26,333 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:26,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-10-03 08:50:26,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:26,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:26,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:26,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:26,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:26,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:26,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:26,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:26,868 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:26,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:26,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:27,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:27,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-03 08:50:27,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:50:27,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:50:27,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:50:27,014 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-03 08:50:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:28,288 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-03 08:50:28,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:50:28,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-03 08:50:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:28,290 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:50:28,290 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:50:28,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:50:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:50:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-03 08:50:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:50:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-03 08:50:28,313 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-03 08:50:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:28,313 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-03 08:50:28,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:50:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-03 08:50:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:50:28,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:28,314 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-03 08:50:28,314 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:28,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-10-03 08:50:28,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:28,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:28,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:28,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:28,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:29,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:29,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:29,371 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:29,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:50:29,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:29,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:31,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:31,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-03 08:50:31,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:50:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:50:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=8251, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:50:31,500 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-10-03 08:50:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:32,851 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-03 08:50:32,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:50:32,851 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-03 08:50:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:32,852 INFO L225 Difference]: With dead ends: 158 [2018-10-03 08:50:32,852 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:50:32,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3101, Invalid=12901, Unknown=0, NotChecked=0, Total=16002 [2018-10-03 08:50:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:50:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:50:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:50:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-03 08:50:32,876 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-03 08:50:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:32,877 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-03 08:50:32,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:50:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-03 08:50:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:50:32,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:32,878 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-03 08:50:32,878 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:32,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-10-03 08:50:32,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:32,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:32,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:32,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:32,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:34,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:34,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:34,264 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:34,346 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-03 08:50:34,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:34,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:34,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:34,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-03 08:50:34,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:50:34,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:50:34,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:50:34,673 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-03 08:50:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:35,414 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-03 08:50:35,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:50:35,415 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-03 08:50:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:35,416 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:50:35,416 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:50:35,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:50:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:50:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-03 08:50:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:50:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-03 08:50:35,440 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-03 08:50:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:35,440 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-03 08:50:35,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:50:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-03 08:50:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:50:35,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:35,441 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-03 08:50:35,441 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:35,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-10-03 08:50:35,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:35,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:35,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:35,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:35,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:36,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:36,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:36,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:36,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:38,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:38,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-03 08:50:38,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:50:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:50:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=8919, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:50:38,746 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-10-03 08:50:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:40,532 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-03 08:50:40,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:50:40,532 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-03 08:50:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:40,533 INFO L225 Difference]: With dead ends: 164 [2018-10-03 08:50:40,533 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:50:40,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6151 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3342, Invalid=13950, Unknown=0, NotChecked=0, Total=17292 [2018-10-03 08:50:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:50:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:50:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:50:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-03 08:50:40,552 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-03 08:50:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:40,552 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-03 08:50:40,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:50:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-03 08:50:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:50:40,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:40,553 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-03 08:50:40,553 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:40,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-10-03 08:50:40,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:40,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:40,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:40,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:41,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:41,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:41,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:41,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:41,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:41,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:41,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:41,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-03 08:50:41,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:50:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:50:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:50:41,299 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-03 08:50:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:41,833 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-03 08:50:41,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:50:41,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-03 08:50:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:41,835 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:50:41,836 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:50:41,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:50:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:50:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-03 08:50:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:50:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-03 08:50:41,861 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-03 08:50:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:41,861 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-03 08:50:41,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:50:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-03 08:50:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:50:41,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:41,862 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-03 08:50:41,862 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:41,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-10-03 08:50:41,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:41,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:41,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:41,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:41,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:42,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:42,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:42,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:43,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:50:43,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:43,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:45,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:45,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-03 08:50:45,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:50:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:50:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2377, Invalid=9613, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:50:45,382 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-10-03 08:50:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:47,496 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-03 08:50:47,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:50:47,496 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-03 08:50:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:47,497 INFO L225 Difference]: With dead ends: 170 [2018-10-03 08:50:47,497 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:50:47,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6644 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3592, Invalid=15040, Unknown=0, NotChecked=0, Total=18632 [2018-10-03 08:50:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:50:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:50:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:50:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-03 08:50:47,519 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-03 08:50:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:47,519 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-03 08:50:47,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:50:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-03 08:50:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:50:47,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:47,520 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-03 08:50:47,520 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:47,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-10-03 08:50:47,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:47,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:47,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:47,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:47,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:48,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:48,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:48,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:48,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:48,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:48,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:48,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:48,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-03 08:50:48,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:50:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:50:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:50:48,390 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-03 08:50:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:48,929 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-03 08:50:48,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:50:48,930 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-03 08:50:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:48,931 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:50:48,932 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:50:48,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:50:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:50:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-03 08:50:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:50:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-03 08:50:48,958 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-03 08:50:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:48,958 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-03 08:50:48,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:50:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-03 08:50:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:50:48,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:48,959 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-03 08:50:48,960 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:48,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-10-03 08:50:48,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:48,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:48,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:48,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:48,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:50,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:50,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:50,070 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:50,159 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:50:50,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:50,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:52,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:52,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-03 08:50:52,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-03 08:50:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-03 08:50:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=10333, Unknown=0, NotChecked=0, Total=12882 [2018-10-03 08:50:52,729 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-10-03 08:50:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:53,796 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-03 08:50:53,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:50:53,796 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-03 08:50:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:53,797 INFO L225 Difference]: With dead ends: 176 [2018-10-03 08:50:53,797 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:50:53,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3851, Invalid=16171, Unknown=0, NotChecked=0, Total=20022 [2018-10-03 08:50:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:50:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 08:50:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 08:50:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-03 08:50:53,819 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-03 08:50:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:53,820 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-03 08:50:53,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-03 08:50:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-03 08:50:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 08:50:53,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:53,821 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-03 08:50:53,821 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:53,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-10-03 08:50:53,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:53,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:53,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:54,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:54,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:54,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:54,385 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-03 08:50:54,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:54,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:54,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:54,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-03 08:50:54,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:50:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:50:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:50:54,680 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-03 08:50:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:55,241 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-03 08:50:55,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:50:55,241 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-03 08:50:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:55,242 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:50:55,242 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:50:55,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:50:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:50:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-03 08:50:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:50:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-03 08:50:55,263 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-03 08:50:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:55,263 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-03 08:50:55,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:50:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-03 08:50:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:50:55,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:55,264 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-03 08:50:55,264 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:55,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-10-03 08:50:55,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:55,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:55,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:55,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:55,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:56,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:56,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:50:56,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:56,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:00,806 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-03 08:51:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:01,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:01,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-03 08:51:01,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-03 08:51:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-03 08:51:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=11079, Unknown=0, NotChecked=0, Total=13806 [2018-10-03 08:51:01,120 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-10-03 08:51:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:04,025 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-03 08:51:04,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:51:04,025 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-10-03 08:51:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:04,026 INFO L225 Difference]: With dead ends: 182 [2018-10-03 08:51:04,026 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:51:04,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4119, Invalid=17343, Unknown=0, NotChecked=0, Total=21462 [2018-10-03 08:51:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:51:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:51:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:51:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-03 08:51:04,049 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-03 08:51:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:04,049 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-03 08:51:04,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-03 08:51:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-03 08:51:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 08:51:04,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:04,050 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-03 08:51:04,050 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:04,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-10-03 08:51:04,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:04,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:04,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:04,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:04,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:04,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:04,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:04,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:04,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:04,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:04,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:04,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:04,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-03 08:51:04,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:51:04,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:51:04,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:51:04,946 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-03 08:51:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:05,531 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-03 08:51:05,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:51:05,532 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-03 08:51:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:05,533 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:51:05,533 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:51:05,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:51:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:51:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-03 08:51:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:51:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-03 08:51:05,555 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-03 08:51:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:05,555 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-03 08:51:05,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:51:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-03 08:51:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:51:05,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:05,556 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-03 08:51:05,556 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:05,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-10-03 08:51:05,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:05,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:05,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:05,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:05,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:07,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:07,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:07,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:07,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:51:07,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:07,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:09,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:09,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-03 08:51:09,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-03 08:51:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-03 08:51:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=11851, Unknown=0, NotChecked=0, Total=14762 [2018-10-03 08:51:09,652 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-10-03 08:51:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:12,932 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-03 08:51:12,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:51:12,933 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-10-03 08:51:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:12,933 INFO L225 Difference]: With dead ends: 188 [2018-10-03 08:51:12,933 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:51:12,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8237 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4396, Invalid=18556, Unknown=0, NotChecked=0, Total=22952 [2018-10-03 08:51:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:51:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 08:51:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:51:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-03 08:51:12,963 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-03 08:51:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:12,963 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-03 08:51:12,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-03 08:51:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-03 08:51:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 08:51:12,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:12,964 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-03 08:51:12,964 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:12,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-10-03 08:51:12,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:12,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:12,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:12,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:12,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:14,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:14,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:14,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:14,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:14,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:14,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:14,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:14,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-03 08:51:14,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:51:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:51:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:51:14,309 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-03 08:51:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:14,922 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-03 08:51:14,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:51:14,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-03 08:51:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:14,924 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:51:14,924 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:51:14,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:51:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:51:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-03 08:51:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:51:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-03 08:51:14,948 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-03 08:51:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:14,948 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-03 08:51:14,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:51:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-03 08:51:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:51:14,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:14,949 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-03 08:51:14,949 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:14,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-10-03 08:51:14,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:14,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:14,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:16,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:16,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:16,642 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:16,743 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:51:16,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:16,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:19,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:19,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-03 08:51:19,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-03 08:51:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-03 08:51:19,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3101, Invalid=12649, Unknown=0, NotChecked=0, Total=15750 [2018-10-03 08:51:19,386 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-10-03 08:51:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:22,322 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-03 08:51:22,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:51:22,322 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-10-03 08:51:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:22,323 INFO L225 Difference]: With dead ends: 194 [2018-10-03 08:51:22,323 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:51:22,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8806 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4682, Invalid=19810, Unknown=0, NotChecked=0, Total=24492 [2018-10-03 08:51:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:51:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 08:51:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:51:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-03 08:51:22,348 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-03 08:51:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:22,348 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-03 08:51:22,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-03 08:51:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-03 08:51:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:51:22,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:22,349 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-03 08:51:22,349 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:22,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-10-03 08:51:22,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:22,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:22,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:22,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:22,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:22,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:22,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:22,890 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:22,995 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-03 08:51:22,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:22,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:23,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:23,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-03 08:51:23,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:51:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:51:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:51:23,074 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-03 08:51:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:23,723 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-03 08:51:23,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:51:23,723 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-03 08:51:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:23,724 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:51:23,724 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:51:23,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:51:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:51:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-03 08:51:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:51:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-03 08:51:23,749 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-03 08:51:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:23,749 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-03 08:51:23,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:51:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-03 08:51:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:51:23,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:23,750 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-03 08:51:23,750 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:23,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-10-03 08:51:23,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:23,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:23,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:25,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:25,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:25,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:25,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:28,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:28,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-03 08:51:28,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-03 08:51:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-03 08:51:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3297, Invalid=13473, Unknown=0, NotChecked=0, Total=16770 [2018-10-03 08:51:28,629 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-10-03 08:51:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:30,229 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-03 08:51:30,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:51:30,229 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-10-03 08:51:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:30,230 INFO L225 Difference]: With dead ends: 200 [2018-10-03 08:51:30,230 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:51:30,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9394 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4977, Invalid=21105, Unknown=0, NotChecked=0, Total=26082 [2018-10-03 08:51:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:51:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 08:51:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:51:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-03 08:51:30,254 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-03 08:51:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:30,254 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-03 08:51:30,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-03 08:51:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-03 08:51:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:51:30,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:30,255 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-03 08:51:30,255 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:30,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-10-03 08:51:30,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:30,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:30,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:30,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:30,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:30,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:30,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:30,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:30,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:30,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:30,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:31,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:31,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-03 08:51:31,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:51:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:51:31,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:51:31,155 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-03 08:51:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:32,079 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-03 08:51:32,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:51:32,080 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-03 08:51:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:32,081 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:51:32,081 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:51:32,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:51:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:51:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-03 08:51:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:51:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-03 08:51:32,108 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-03 08:51:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:32,108 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-03 08:51:32,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:51:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-03 08:51:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:51:32,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:32,109 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-03 08:51:32,109 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:32,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-10-03 08:51:32,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:32,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:32,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:32,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:32,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:33,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:33,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:33,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:33,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:51:33,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:33,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:37,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:37,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-03 08:51:37,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-03 08:51:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-03 08:51:37,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3499, Invalid=14323, Unknown=0, NotChecked=0, Total=17822 [2018-10-03 08:51:37,195 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-10-03 08:51:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:41,170 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-03 08:51:41,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:51:41,170 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-10-03 08:51:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:41,171 INFO L225 Difference]: With dead ends: 206 [2018-10-03 08:51:41,171 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:51:41,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10001 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5281, Invalid=22441, Unknown=0, NotChecked=0, Total=27722 [2018-10-03 08:51:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:51:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 08:51:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 08:51:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-03 08:51:41,197 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-03 08:51:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:41,198 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-03 08:51:41,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-03 08:51:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-03 08:51:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 08:51:41,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:41,198 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-03 08:51:41,199 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:41,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:41,199 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-10-03 08:51:41,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:41,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:41,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:41,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:41,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:42,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:42,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:42,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:42,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:42,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:42,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:42,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:42,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-03 08:51:42,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:51:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:51:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:51:42,259 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-03 08:51:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:43,012 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-03 08:51:43,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:51:43,012 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-03 08:51:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:43,013 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:51:43,013 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:51:43,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:51:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:51:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-03 08:51:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:51:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-03 08:51:43,044 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-03 08:51:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:43,044 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-03 08:51:43,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:51:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-03 08:51:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:51:43,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:43,045 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-03 08:51:43,045 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:43,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-10-03 08:51:43,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:43,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:43,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:43,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:43,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:44,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:44,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:44,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:44,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:51:44,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:44,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:48,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:48,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-03 08:51:48,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-03 08:51:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-03 08:51:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3707, Invalid=15199, Unknown=0, NotChecked=0, Total=18906 [2018-10-03 08:51:48,233 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-10-03 08:51:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:51,281 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-03 08:51:51,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:51:51,281 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-10-03 08:51:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:51,282 INFO L225 Difference]: With dead ends: 212 [2018-10-03 08:51:51,282 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:51:51,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10627 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5594, Invalid=23818, Unknown=0, NotChecked=0, Total=29412 [2018-10-03 08:51:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:51:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:51:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:51:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-03 08:51:51,309 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-03 08:51:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:51,309 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-03 08:51:51,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-03 08:51:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-03 08:51:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 08:51:51,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:51,310 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-03 08:51:51,310 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:51,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-10-03 08:51:51,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:51,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:51,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:51,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:51,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:52,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:52,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:52,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:52,363 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-03 08:51:52,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:52,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:52,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:52,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-03 08:51:52,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:51:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:51:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:51:52,450 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-03 08:51:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:53,260 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-03 08:51:53,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:51:53,260 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-03 08:51:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:53,261 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:51:53,262 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:51:53,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:51:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:51:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-03 08:51:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:51:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-03 08:51:53,293 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-03 08:51:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:53,293 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-03 08:51:53,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:51:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-03 08:51:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:51:53,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:53,294 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-03 08:51:53,294 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:53,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:53,294 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-10-03 08:51:53,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:53,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:53,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:53,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:53,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:54,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:54,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:51:54,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:55,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:58,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:58,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-03 08:51:58,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-03 08:51:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-03 08:51:58,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=16101, Unknown=0, NotChecked=0, Total=20022 [2018-10-03 08:51:58,652 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-10-03 08:52:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:02,839 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-03 08:52:02,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:52:02,839 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-10-03 08:52:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:02,840 INFO L225 Difference]: With dead ends: 218 [2018-10-03 08:52:02,840 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 08:52:02,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11272 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5916, Invalid=25236, Unknown=0, NotChecked=0, Total=31152 [2018-10-03 08:52:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 08:52:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 08:52:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:52:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-03 08:52:02,876 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-03 08:52:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:02,877 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-03 08:52:02,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-03 08:52:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-03 08:52:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 08:52:02,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:02,878 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-03 08:52:02,878 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:02,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-10-03 08:52:02,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:02,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:02,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:02,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:02,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:03,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:03,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:03,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:52:03,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:52:03,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:03,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:03,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:03,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-03 08:52:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:52:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:52:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:52:03,700 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-03 08:52:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:04,505 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-03 08:52:04,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:52:04,506 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-03 08:52:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:04,506 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:52:04,507 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:52:04,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:52:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:52:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-03 08:52:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:52:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-03 08:52:04,541 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-03 08:52:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:04,542 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-03 08:52:04,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:52:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-03 08:52:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:52:04,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:04,543 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-03 08:52:04,543 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:04,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-10-03 08:52:04,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:04,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:04,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:04,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:04,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:06,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:06,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:06,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:52:06,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:52:06,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:06,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:10,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:10,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-10-03 08:52:10,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-03 08:52:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-03 08:52:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=17029, Unknown=0, NotChecked=0, Total=21170 [2018-10-03 08:52:10,374 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-10-03 08:52:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:14,280 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-03 08:52:14,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:52:14,280 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-10-03 08:52:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:14,281 INFO L225 Difference]: With dead ends: 224 [2018-10-03 08:52:14,281 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:52:14,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11936 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6247, Invalid=26695, Unknown=0, NotChecked=0, Total=32942 [2018-10-03 08:52:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:52:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 08:52:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:52:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-03 08:52:14,321 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-03 08:52:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:14,321 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-03 08:52:14,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-03 08:52:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-03 08:52:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:52:14,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:14,322 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-03 08:52:14,322 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:14,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-10-03 08:52:14,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:14,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:14,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:14,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:14,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:14,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:14,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:15,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:52:15,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:52:15,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:15,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:15,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:15,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-03 08:52:15,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:52:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:52:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:52:15,208 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-03 08:52:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:16,092 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-03 08:52:16,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:52:16,092 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-03 08:52:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:16,093 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:52:16,093 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:52:16,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:52:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:52:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-03 08:52:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:52:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-03 08:52:16,124 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-03 08:52:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:16,124 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-03 08:52:16,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:52:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-03 08:52:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:52:16,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:16,125 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-03 08:52:16,126 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:16,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:16,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-10-03 08:52:16,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:16,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:16,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:16,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:16,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:18,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:18,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:18,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:52:18,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:52:18,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:18,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:22,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:22,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-10-03 08:52:22,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-03 08:52:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-03 08:52:22,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4367, Invalid=17983, Unknown=0, NotChecked=0, Total=22350 [2018-10-03 08:52:22,275 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-10-03 08:52:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:26,353 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-03 08:52:26,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:52:26,353 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-10-03 08:52:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:26,354 INFO L225 Difference]: With dead ends: 230 [2018-10-03 08:52:26,354 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:52:26,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12619 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6587, Invalid=28195, Unknown=0, NotChecked=0, Total=34782 [2018-10-03 08:52:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:52:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 08:52:26,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 08:52:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-03 08:52:26,393 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-03 08:52:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:26,393 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-03 08:52:26,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-03 08:52:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-03 08:52:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:52:26,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:26,394 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-03 08:52:26,394 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:26,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:26,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-10-03 08:52:26,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:26,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:26,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:26,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:26,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:27,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:27,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:27,104 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:52:27,234 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-03 08:52:27,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:27,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:27,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:27,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-03 08:52:27,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:52:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:52:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:52:27,324 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-03 08:52:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:28,434 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-03 08:52:28,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:52:28,435 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-03 08:52:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:28,436 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:52:28,436 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:52:28,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:52:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:52:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-03 08:52:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:52:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-03 08:52:28,469 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-03 08:52:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:28,469 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-03 08:52:28,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:52:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-03 08:52:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:52:28,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:28,470 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-03 08:52:28,470 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:28,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-10-03 08:52:28,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:28,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:28,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:28,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:28,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:30,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:30,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:30,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:30,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:34,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:34,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-10-03 08:52:34,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-03 08:52:34,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-03 08:52:34,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4599, Invalid=18963, Unknown=0, NotChecked=0, Total=23562 [2018-10-03 08:52:34,698 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-10-03 08:52:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:39,471 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-03 08:52:39,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:52:39,471 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-10-03 08:52:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:39,472 INFO L225 Difference]: With dead ends: 236 [2018-10-03 08:52:39,472 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 08:52:39,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13321 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6936, Invalid=29736, Unknown=0, NotChecked=0, Total=36672 [2018-10-03 08:52:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 08:52:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 08:52:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:52:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-03 08:52:39,505 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-03 08:52:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:39,506 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-03 08:52:39,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-03 08:52:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-03 08:52:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:52:39,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:39,506 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-03 08:52:39,507 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:39,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:39,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-10-03 08:52:39,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:39,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:39,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:39,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:39,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:40,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:40,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:40,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:52:40,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:52:40,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:40,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:40,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:40,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-03 08:52:40,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:52:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:52:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:52:40,563 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-03 08:52:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:41,482 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-03 08:52:41,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:52:41,482 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-03 08:52:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:41,483 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:52:41,483 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:52:41,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:52:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:52:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-03 08:52:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:52:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-03 08:52:41,524 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-03 08:52:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:41,524 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-03 08:52:41,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:52:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-03 08:52:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:52:41,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:41,525 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-03 08:52:41,525 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:41,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-10-03 08:52:41,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:41,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:41,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:41,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:41,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:44,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:44,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:44,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:52:44,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:52:44,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:44,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:48,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:48,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-10-03 08:52:48,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-03 08:52:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-03 08:52:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4837, Invalid=19969, Unknown=0, NotChecked=0, Total=24806 [2018-10-03 08:52:48,525 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-10-03 08:52:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:52,510 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-03 08:52:52,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:52:52,510 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-10-03 08:52:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:52,511 INFO L225 Difference]: With dead ends: 242 [2018-10-03 08:52:52,511 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:52:52,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=7294, Invalid=31318, Unknown=0, NotChecked=0, Total=38612 [2018-10-03 08:52:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:52:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:52:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:52:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-03 08:52:52,552 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-03 08:52:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:52,552 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-03 08:52:52,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-03 08:52:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-03 08:52:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:52:52,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:52,553 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-03 08:52:52,554 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:52,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-10-03 08:52:52,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:52,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:52,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:52,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:52,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:53,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:53,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:53,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:52:53,828 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:52:53,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:53,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:53,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:53,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-03 08:52:53,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:52:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:52:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:52:53,931 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-03 08:52:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:54,917 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-03 08:52:54,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:52:54,918 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-03 08:52:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:54,918 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:52:54,918 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:52:54,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:52:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:52:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-03 08:52:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:52:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-03 08:52:54,954 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-03 08:52:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:54,954 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-03 08:52:54,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:52:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-03 08:52:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:52:54,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:54,955 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-03 08:52:54,956 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:54,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-10-03 08:52:54,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:54,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:54,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:54,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:54,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:57,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:57,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:52:57,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:52:57,243 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:52:57,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:57,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:01,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-10-03 08:53:01,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-03 08:53:01,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-03 08:53:01,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5081, Invalid=21001, Unknown=0, NotChecked=0, Total=26082 [2018-10-03 08:53:01,941 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-10-03 08:53:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:04,412 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-03 08:53:04,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:53:04,412 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-10-03 08:53:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:04,413 INFO L225 Difference]: With dead ends: 248 [2018-10-03 08:53:04,413 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 08:53:04,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14782 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=7661, Invalid=32941, Unknown=0, NotChecked=0, Total=40602 [2018-10-03 08:53:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 08:53:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 08:53:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:53:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-03 08:53:04,452 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-03 08:53:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:04,452 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-03 08:53:04,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-03 08:53:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-03 08:53:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 08:53:04,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:04,453 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-03 08:53:04,453 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:04,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-10-03 08:53:04,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:04,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:05,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:05,263 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:05,412 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-03 08:53:05,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:05,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:05,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-03 08:53:05,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:53:05,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:53:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:53:05,569 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. Received shutdown request... [2018-10-03 08:53:06,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:53:06,409 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:53:06,414 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:53:06,414 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:53:06 BoogieIcfgContainer [2018-10-03 08:53:06,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:53:06,415 INFO L168 Benchmark]: Toolchain (without parser) took 237114.84 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -109.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 152.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2018-10-03 08:53:06,416 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:53:06,416 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:53:06,416 INFO L168 Benchmark]: Boogie Preprocessor took 25.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:53:06,417 INFO L168 Benchmark]: RCFGBuilder took 359.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:53:06,417 INFO L168 Benchmark]: TraceAbstraction took 236682.99 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -109.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 131.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2018-10-03 08:53:06,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 359.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236682.99 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -109.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 131.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was constructing difference of abstraction (165states) and FLOYD_HOARE automaton (currently 77 states, 46 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 80 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 236.6s OverallTime, 80 OverallIterations, 41 TraceHistogramMax, 88.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1180 SDtfs, 903 SDslu, 6381 SDs, 0 SdLazy, 63842 SolverSat, 3954 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11821 GetRequests, 5891 SyntacticMatches, 0 SemanticMatches, 5929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226025 ImplicationChecksByTransitivity, 168.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 79 MinimizatonAttempts, 156 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 137.0s InterpolantComputationTime, 13586 NumberOfCodeBlocks, 13586 NumberOfCodeBlocksAsserted, 1003 NumberOfCheckSat, 13428 ConstructedInterpolants, 0 QuantifiedInterpolants, 7396594 SizeOfPredicates, 312 NumberOfNonLiveVariables, 27456 ConjunctsInSsa, 3666 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 88558/173838 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-53-06-431.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-53-06-431.csv Completed graceful shutdown