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/gj2007.c.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:26:24,128 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:26:24,130 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:26:24,142 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:26:24,142 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:26:24,144 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:26:24,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:26:24,146 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:26:24,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:26:24,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:26:24,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:26:24,185 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 [2018-09-23 21:26:24,217 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:26:24,217 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:26:24,218 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:26:24,218 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:26:24,219 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:26:24,219 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:26:24,219 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:26:24,220 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:26:24,220 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:26:24,220 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:26:24,220 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:26:24,221 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:26:24,221 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:26:24,222 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:26:24,222 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:26:24,222 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:26:24,222 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:26:24,222 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:26:24,223 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:26:24,223 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:26:24,223 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:26:24,224 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:26:24,224 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:26:24,224 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:26:24,224 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:26:24,225 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:26:24,225 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:26:24,225 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:26:24,225 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:26:24,226 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:26:24,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:26:24,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:26:24,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:26:24,313 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:26:24,314 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:26:24,315 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gj2007.c.i_4.bpl [2018-09-23 21:26:24,315 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gj2007.c.i_4.bpl' [2018-09-23 21:26:24,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:26:24,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:26:24,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:26:24,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:26:24,371 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:26:24,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:26:24,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:26:24,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:26:24,414 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:26:24,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... [2018-09-23 21:26:24,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:26:24,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:26:24,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:26:24,437 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:26:24,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:26:24,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:26:24,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:26:24,759 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:26:24,760 INFO L202 PluginConnector]: Adding new model gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:26:24 BoogieIcfgContainer [2018-09-23 21:26:24,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:26:24,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:26:24,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:26:24,767 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:26:24,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:26:24" (1/2) ... [2018-09-23 21:26:24,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59422fc3 and model type gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:26:24, skipping insertion in model container [2018-09-23 21:26:24,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:26:24" (2/2) ... [2018-09-23 21:26:24,771 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.c.i_4.bpl [2018-09-23 21:26:24,780 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:26:24,791 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:26:24,837 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:26:24,838 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:26:24,838 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:26:24,838 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:26:24,838 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:26:24,838 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:26:24,839 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:26:24,839 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:26:24,839 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:26:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 21:26:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:26:24,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:24,862 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:26:24,863 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:24,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 21:26:24,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:24,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:24,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:24,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:24,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,022 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:26:25,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:26:25,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:26:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:26:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:26:25,042 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 21:26:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:25,119 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-23 21:26:25,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:26:25,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 21:26:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:25,132 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:26:25,132 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:26:25,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:26:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:26:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:26:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:26:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 21:26:25,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-23 21:26:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:25,174 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 21:26:25,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:26:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 21:26:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:26:25,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:25,175 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-23 21:26:25,176 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:25,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:25,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1807905788, now seen corresponding path program 1 times [2018-09-23 21:26:25,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:25,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:25,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:25,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:25,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:25,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:25,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:25,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,463 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:26:25,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-09-23 21:26:25,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:26:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:26:25,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:26:25,465 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-23 21:26:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:25,532 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-23 21:26:25,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:26:25,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-23 21:26:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:25,534 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:26:25,534 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:26:25,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:26:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:26:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-09-23 21:26:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:26:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-23 21:26:25,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2018-09-23 21:26:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:25,541 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-23 21:26:25,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:26:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-23 21:26:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:26:25,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:25,542 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1] [2018-09-23 21:26:25,542 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:25,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1839610074, now seen corresponding path program 1 times [2018-09-23 21:26:25,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:25,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:25,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:25,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:25,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:25,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:25,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:25,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:25,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:26:25,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:26:25,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:26:25,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:26:25,704 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-09-23 21:26:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:25,805 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-09-23 21:26:25,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:26:25,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-23 21:26:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:25,806 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:26:25,807 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:26:25,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:26:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:26:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:26:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:26:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-23 21:26:25,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-09-23 21:26:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:25,814 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-23 21:26:25,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:26:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-23 21:26:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:26:25,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:25,815 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1] [2018-09-23 21:26:25,815 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:25,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1731932091, now seen corresponding path program 2 times [2018-09-23 21:26:25,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:25,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:25,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:25,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:25,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:26,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:26,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:26,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:26,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:26,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:26,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:26,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:26,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:26:26,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:26:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:26:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:26:26,151 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2018-09-23 21:26:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:26,281 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-23 21:26:26,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:26:26,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-09-23 21:26:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:26,282 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:26:26,283 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:26:26,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:26:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:26:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:26:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:26:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-23 21:26:26,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-09-23 21:26:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:26,293 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-23 21:26:26,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:26:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-23 21:26:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:26:26,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:26,295 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1] [2018-09-23 21:26:26,296 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:26,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1975221498, now seen corresponding path program 3 times [2018-09-23 21:26:26,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:26,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:26,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:26,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:26,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:26,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:26,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:26,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:26:26,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:26,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:26:26,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:26,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-09-23 21:26:26,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:26:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:26:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:26:26,593 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2018-09-23 21:26:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:26,698 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-09-23 21:26:26,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:26:26,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-09-23 21:26:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:26,701 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:26:26,702 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:26:26,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:26:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:26:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-09-23 21:26:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:26:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-23 21:26:26,712 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2018-09-23 21:26:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:26,712 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-23 21:26:26,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:26:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-23 21:26:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:26:26,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:26,713 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 5, 2, 1, 1, 1] [2018-09-23 21:26:26,714 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:26,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2006868068, now seen corresponding path program 4 times [2018-09-23 21:26:26,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:26,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:26,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:26,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:26:26,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:26,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:26,874 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:26,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:26,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:26,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:26:26,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:26,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:26:26,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:26:26,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:26:26,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:26:26,923 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2018-09-23 21:26:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:27,000 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-09-23 21:26:27,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:26:27,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-09-23 21:26:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:27,002 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:26:27,002 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:26:27,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:26:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:26:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:26:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:26:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-23 21:26:27,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2018-09-23 21:26:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:27,009 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-23 21:26:27,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:26:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-23 21:26:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:26:27,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:27,011 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 6, 2, 1, 1, 1] [2018-09-23 21:26:27,011 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:27,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash -266768761, now seen corresponding path program 5 times [2018-09-23 21:26:27,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:27,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:27,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:27,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:27,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:26:27,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:27,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:27,394 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:27,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 21:26:27,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:27,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:26:27,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:27,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:26:27,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:26:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:26:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:26:27,555 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-23 21:26:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:27,638 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-09-23 21:26:27,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:26:27,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-23 21:26:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:27,641 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:26:27,641 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:26:27,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:26:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:26:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:26:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:26:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-23 21:26:27,648 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2018-09-23 21:26:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:27,648 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-23 21:26:27,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:26:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-23 21:26:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:26:27,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:27,650 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 7, 2, 1, 1, 1] [2018-09-23 21:26:27,650 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:27,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1223576644, now seen corresponding path program 6 times [2018-09-23 21:26:27,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:27,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:27,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:27,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:27,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:26:27,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:27,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:27,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:27,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 21:26:27,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:27,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-23 21:26:27,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:27,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-09-23 21:26:27,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:26:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:26:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:26:27,946 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2018-09-23 21:26:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:28,046 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2018-09-23 21:26:28,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:26:28,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-09-23 21:26:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:28,048 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:26:28,048 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:26:28,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:26:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:26:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-09-23 21:26:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:26:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-09-23 21:26:28,056 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2018-09-23 21:26:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:28,056 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-09-23 21:26:28,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:26:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-09-23 21:26:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:26:28,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:28,058 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 3, 1, 1, 1] [2018-09-23 21:26:28,058 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:28,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1547890150, now seen corresponding path program 7 times [2018-09-23 21:26:28,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:28,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:28,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:28,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:28,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:26:28,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:28,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:28,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:28,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:26:28,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:28,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:26:28,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:26:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:26:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:26:28,391 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2018-09-23 21:26:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:28,649 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2018-09-23 21:26:28,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:26:28,650 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-09-23 21:26:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:28,651 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:26:28,651 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:26:28,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:26:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:26:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:26:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:26:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-23 21:26:28,667 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2018-09-23 21:26:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:28,668 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-23 21:26:28,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:26:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-23 21:26:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:26:28,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:28,669 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 9, 3, 1, 1, 1] [2018-09-23 21:26:28,672 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:28,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1837705083, now seen corresponding path program 8 times [2018-09-23 21:26:28,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:28,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:28,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:28,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:28,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:26:28,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:28,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:29,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:29,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:29,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:29,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:26:29,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:29,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:26:29,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:26:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:26:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:26:29,057 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 12 states. [2018-09-23 21:26:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:29,156 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2018-09-23 21:26:29,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:26:29,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2018-09-23 21:26:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:29,158 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:26:29,158 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:26:29,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:26:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:26:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:26:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:26:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-09-23 21:26:29,168 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2018-09-23 21:26:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:29,169 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-09-23 21:26:29,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:26:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-09-23 21:26:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:26:29,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:29,171 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 10, 3, 1, 1, 1] [2018-09-23 21:26:29,171 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:29,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1464858170, now seen corresponding path program 9 times [2018-09-23 21:26:29,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:29,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:29,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:29,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:29,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 165 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:26:29,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:29,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:29,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:29,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:26:29,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:29,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 110 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-09-23 21:26:29,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:29,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 17 [2018-09-23 21:26:29,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:26:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:26:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:26:29,484 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 17 states. [2018-09-23 21:26:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:29,616 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2018-09-23 21:26:29,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:26:29,617 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2018-09-23 21:26:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:29,619 INFO L225 Difference]: With dead ends: 64 [2018-09-23 21:26:29,619 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:26:29,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:26:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:26:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-09-23 21:26:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:26:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-09-23 21:26:29,627 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 43 [2018-09-23 21:26:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:29,628 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-09-23 21:26:29,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:26:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-09-23 21:26:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:26:29,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:29,629 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 11, 4, 1, 1, 1] [2018-09-23 21:26:29,630 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:29,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:29,630 INFO L82 PathProgramCache]: Analyzing trace with hash 469061468, now seen corresponding path program 10 times [2018-09-23 21:26:29,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:29,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:29,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:29,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:29,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-23 21:26:29,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:29,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:29,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:29,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:29,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:29,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-23 21:26:29,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:29,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:26:29,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:26:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:26:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:26:29,912 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2018-09-23 21:26:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:30,002 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2018-09-23 21:26:30,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:26:30,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2018-09-23 21:26:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:30,004 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:26:30,004 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:26:30,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:26:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:26:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:26:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:26:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-09-23 21:26:30,013 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 49 [2018-09-23 21:26:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:30,013 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-09-23 21:26:30,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:26:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-09-23 21:26:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:26:30,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:30,015 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 12, 4, 1, 1, 1] [2018-09-23 21:26:30,015 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:30,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash -990261945, now seen corresponding path program 11 times [2018-09-23 21:26:30,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:30,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:30,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:30,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:30,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-23 21:26:30,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:30,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:30,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:30,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-23 21:26:30,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:30,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-23 21:26:30,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:30,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:26:30,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:26:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:26:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:26:30,327 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 15 states. [2018-09-23 21:26:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:30,474 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-09-23 21:26:30,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:26:30,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2018-09-23 21:26:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:30,476 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:26:30,476 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:26:30,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:26:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:26:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:26:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:26:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-09-23 21:26:30,484 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 52 [2018-09-23 21:26:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:30,484 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-09-23 21:26:30,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:26:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-09-23 21:26:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:26:30,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:30,485 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 13, 4, 1, 1, 1] [2018-09-23 21:26:30,486 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:30,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2035088516, now seen corresponding path program 12 times [2018-09-23 21:26:30,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:30,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:30,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:30,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:30,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 154 proven. 273 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-23 21:26:30,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:30,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:30,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:30,857 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-23 21:26:30,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:30,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 182 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-09-23 21:26:31,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:31,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2018-09-23 21:26:31,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:26:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:26:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:26:31,710 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 21 states. [2018-09-23 21:26:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:31,830 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-09-23 21:26:31,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:26:31,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2018-09-23 21:26:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:31,832 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:26:31,832 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:26:31,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:26:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:26:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-09-23 21:26:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:26:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2018-09-23 21:26:31,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 55 [2018-09-23 21:26:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:31,845 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2018-09-23 21:26:31,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:26:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2018-09-23 21:26:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:26:31,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:31,847 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 14, 5, 1, 1, 1] [2018-09-23 21:26:31,847 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:31,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1900338010, now seen corresponding path program 13 times [2018-09-23 21:26:31,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:31,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:31,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-23 21:26:32,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:32,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:32,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:32,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-23 21:26:32,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:32,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:26:32,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:26:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:26:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:26:32,459 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 17 states. [2018-09-23 21:26:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:32,591 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2018-09-23 21:26:32,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:26:32,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-09-23 21:26:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:32,593 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:26:32,593 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:26:32,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:26:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:26:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:26:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:26:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-09-23 21:26:32,602 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 61 [2018-09-23 21:26:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:32,602 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-09-23 21:26:32,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:26:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-09-23 21:26:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:26:32,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:32,604 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 15, 5, 1, 1, 1] [2018-09-23 21:26:32,604 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:32,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1598238523, now seen corresponding path program 14 times [2018-09-23 21:26:32,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:32,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:32,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:32,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:32,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-23 21:26:32,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:32,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:32,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:32,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:32,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:32,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-23 21:26:32,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:32,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:26:32,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:26:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:26:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:26:32,959 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 18 states. [2018-09-23 21:26:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:33,040 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2018-09-23 21:26:33,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:26:33,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2018-09-23 21:26:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:33,042 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:26:33,042 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:26:33,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:26:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:26:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:26:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:26:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-09-23 21:26:33,051 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 64 [2018-09-23 21:26:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:33,051 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-09-23 21:26:33,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:26:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-09-23 21:26:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:26:33,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:33,053 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 16, 5, 1, 1, 1] [2018-09-23 21:26:33,053 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:33,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1720361094, now seen corresponding path program 15 times [2018-09-23 21:26:33,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:33,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:33,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:33,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:33,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 238 proven. 408 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-23 21:26:33,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:33,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:33,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:33,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:26:33,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:33,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 40 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-09-23 21:26:33,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:33,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 25 [2018-09-23 21:26:33,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:26:33,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:26:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:26:33,643 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 25 states. [2018-09-23 21:26:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:34,037 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2018-09-23 21:26:34,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:26:34,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2018-09-23 21:26:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:34,040 INFO L225 Difference]: With dead ends: 94 [2018-09-23 21:26:34,040 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:26:34,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:26:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:26:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-09-23 21:26:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:26:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2018-09-23 21:26:34,050 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 67 [2018-09-23 21:26:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:34,050 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2018-09-23 21:26:34,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:26:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2018-09-23 21:26:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:26:34,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:34,052 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 17, 6, 1, 1, 1] [2018-09-23 21:26:34,052 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:34,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -867234020, now seen corresponding path program 16 times [2018-09-23 21:26:34,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:34,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:34,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:34,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:34,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-23 21:26:34,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:34,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:34,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:34,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:34,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:34,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-23 21:26:34,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:34,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:26:34,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:26:34,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:26:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:26:34,473 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 20 states. [2018-09-23 21:26:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:34,570 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2018-09-23 21:26:34,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:26:34,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2018-09-23 21:26:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:34,572 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:26:34,572 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:26:34,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:26:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:26:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:26:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:26:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-09-23 21:26:34,578 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 73 [2018-09-23 21:26:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:34,579 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-09-23 21:26:34,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:26:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-09-23 21:26:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:26:34,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:34,580 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 18, 6, 1, 1, 1] [2018-09-23 21:26:34,580 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:34,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1757201401, now seen corresponding path program 17 times [2018-09-23 21:26:34,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:34,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:34,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:34,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:34,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-23 21:26:34,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:34,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:34,892 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:34,925 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:26:34,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:34,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-23 21:26:34,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:34,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:26:34,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:26:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:26:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:26:34,967 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 21 states. [2018-09-23 21:26:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:35,141 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2018-09-23 21:26:35,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:26:35,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2018-09-23 21:26:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:35,142 INFO L225 Difference]: With dead ends: 102 [2018-09-23 21:26:35,142 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:26:35,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:26:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:26:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:26:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:26:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2018-09-23 21:26:35,149 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 76 [2018-09-23 21:26:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:35,149 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2018-09-23 21:26:35,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:26:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2018-09-23 21:26:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:26:35,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:35,150 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 19, 6, 1, 1, 1] [2018-09-23 21:26:35,151 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:35,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1942330564, now seen corresponding path program 18 times [2018-09-23 21:26:35,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:35,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:35,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:35,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:35,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 340 proven. 570 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-23 21:26:35,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:35,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:35,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:35,529 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-23 21:26:35,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:35,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 380 proven. 57 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2018-09-23 21:26:35,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:35,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2018-09-23 21:26:35,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:26:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:26:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:26:35,758 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 29 states. [2018-09-23 21:26:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:35,928 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2018-09-23 21:26:35,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:26:35,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2018-09-23 21:26:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:35,930 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:26:35,930 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:26:35,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:26:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:26:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-09-23 21:26:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:26:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2018-09-23 21:26:35,938 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 79 [2018-09-23 21:26:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:35,938 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2018-09-23 21:26:35,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:26:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2018-09-23 21:26:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:26:35,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:35,939 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 20, 7, 1, 1, 1] [2018-09-23 21:26:35,940 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:35,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1524001638, now seen corresponding path program 19 times [2018-09-23 21:26:35,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:35,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:35,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:35,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:35,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-23 21:26:36,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:36,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:36,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:36,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-23 21:26:36,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:36,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:26:36,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:26:36,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:26:36,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:26:36,392 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 23 states. [2018-09-23 21:26:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:36,465 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2018-09-23 21:26:36,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:26:36,465 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2018-09-23 21:26:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:36,466 INFO L225 Difference]: With dead ends: 114 [2018-09-23 21:26:36,467 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:26:36,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:26:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:26:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:26:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:26:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2018-09-23 21:26:36,472 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 85 [2018-09-23 21:26:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:36,473 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2018-09-23 21:26:36,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:26:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2018-09-23 21:26:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:26:36,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:36,474 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 21, 7, 1, 1, 1] [2018-09-23 21:26:36,474 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:36,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash 427997445, now seen corresponding path program 20 times [2018-09-23 21:26:36,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:36,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:36,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:36,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:36,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-23 21:26:36,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:36,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:36,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:36,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:36,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:36,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-23 21:26:36,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:36,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:26:36,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:26:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:26:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:26:36,964 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 24 states. [2018-09-23 21:26:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:37,104 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2018-09-23 21:26:37,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:26:37,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2018-09-23 21:26:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:37,106 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:26:37,106 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:26:37,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:26:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:26:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:26:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:26:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2018-09-23 21:26:37,111 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 88 [2018-09-23 21:26:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:37,111 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2018-09-23 21:26:37,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:26:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2018-09-23 21:26:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:26:37,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:37,112 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 22, 7, 1, 1, 1] [2018-09-23 21:26:37,112 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:37,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1424508742, now seen corresponding path program 21 times [2018-09-23 21:26:37,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:37,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:37,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:37,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:37,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 460 proven. 759 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-23 21:26:37,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:37,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:37,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:37,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:26:37,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:37,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 506 proven. 77 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-09-23 21:26:38,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:38,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 33 [2018-09-23 21:26:38,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:26:38,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:26:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:26:38,172 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 33 states. [2018-09-23 21:26:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:38,477 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2018-09-23 21:26:38,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:26:38,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2018-09-23 21:26:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:38,478 INFO L225 Difference]: With dead ends: 124 [2018-09-23 21:26:38,478 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:26:38,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:26:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:26:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-09-23 21:26:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:26:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2018-09-23 21:26:38,486 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 91 [2018-09-23 21:26:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:38,486 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2018-09-23 21:26:38,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:26:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2018-09-23 21:26:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:26:38,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:38,487 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 23, 8, 1, 1, 1] [2018-09-23 21:26:38,488 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:38,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash 201514716, now seen corresponding path program 22 times [2018-09-23 21:26:38,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:38,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:38,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:38,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:38,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-23 21:26:39,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:39,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:39,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:39,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:39,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:39,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-23 21:26:39,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:39,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:26:39,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:26:39,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:26:39,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:26:39,520 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 26 states. [2018-09-23 21:26:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:39,612 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2018-09-23 21:26:39,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:26:39,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2018-09-23 21:26:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:39,614 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:26:39,614 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:26:39,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:26:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:26:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:26:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:26:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2018-09-23 21:26:39,620 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 97 [2018-09-23 21:26:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:39,620 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2018-09-23 21:26:39,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:26:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2018-09-23 21:26:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:26:39,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:39,622 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 24, 8, 1, 1, 1] [2018-09-23 21:26:39,622 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:39,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:39,622 INFO L82 PathProgramCache]: Analyzing trace with hash -527844665, now seen corresponding path program 23 times [2018-09-23 21:26:39,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:39,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:39,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:39,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:39,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-23 21:26:40,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:40,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:40,056 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:40,104 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-09-23 21:26:40,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:40,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-23 21:26:40,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:40,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:26:40,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:26:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:26:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:26:40,156 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 27 states. [2018-09-23 21:26:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:40,421 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2018-09-23 21:26:40,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:26:40,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2018-09-23 21:26:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:40,423 INFO L225 Difference]: With dead ends: 132 [2018-09-23 21:26:40,423 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:26:40,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:26:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:26:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:26:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:26:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2018-09-23 21:26:40,430 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 100 [2018-09-23 21:26:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:40,430 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2018-09-23 21:26:40,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:26:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2018-09-23 21:26:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:26:40,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:40,431 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 25, 8, 1, 1, 1] [2018-09-23 21:26:40,431 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:40,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash -633613572, now seen corresponding path program 24 times [2018-09-23 21:26:40,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:40,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:40,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:40,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:40,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 598 proven. 975 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-23 21:26:41,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:41,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:41,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:41,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-23 21:26:41,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:41,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 650 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-09-23 21:26:41,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:41,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 37 [2018-09-23 21:26:41,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:26:41,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:26:41,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:26:41,320 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 37 states. [2018-09-23 21:26:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:41,473 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2018-09-23 21:26:41,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:26:41,473 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 103 [2018-09-23 21:26:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:41,475 INFO L225 Difference]: With dead ends: 139 [2018-09-23 21:26:41,475 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:26:41,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:26:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:26:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-09-23 21:26:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:26:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2018-09-23 21:26:41,482 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 103 [2018-09-23 21:26:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:41,482 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2018-09-23 21:26:41,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:26:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2018-09-23 21:26:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 21:26:41,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:41,483 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 26, 9, 1, 1, 1] [2018-09-23 21:26:41,483 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:41,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash 223821274, now seen corresponding path program 25 times [2018-09-23 21:26:41,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:41,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:41,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:41,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:41,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-23 21:26:42,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:42,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:42,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:42,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-23 21:26:42,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:42,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:26:42,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:26:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:26:42,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:26:42,917 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand 29 states. [2018-09-23 21:26:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:43,068 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2018-09-23 21:26:43,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:26:43,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2018-09-23 21:26:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:43,070 INFO L225 Difference]: With dead ends: 144 [2018-09-23 21:26:43,070 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:26:43,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:26:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:26:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:26:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:26:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2018-09-23 21:26:43,078 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 109 [2018-09-23 21:26:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:43,078 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2018-09-23 21:26:43,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:26:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2018-09-23 21:26:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:26:43,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:43,079 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 27, 9, 1, 1, 1] [2018-09-23 21:26:43,079 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:43,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1370788165, now seen corresponding path program 26 times [2018-09-23 21:26:43,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:43,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:43,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:43,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:43,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-23 21:26:43,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:43,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:43,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:43,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:43,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:43,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-23 21:26:43,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:43,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:26:43,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:26:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:26:43,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:26:43,684 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 30 states. [2018-09-23 21:26:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:43,867 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2018-09-23 21:26:43,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:26:43,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2018-09-23 21:26:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:43,868 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:26:43,868 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 21:26:43,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:26:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 21:26:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 21:26:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 21:26:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2018-09-23 21:26:43,874 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 112 [2018-09-23 21:26:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:43,874 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2018-09-23 21:26:43,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:26:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2018-09-23 21:26:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 21:26:43,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:43,874 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 28, 9, 1, 1, 1] [2018-09-23 21:26:43,875 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:43,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash -98369030, now seen corresponding path program 27 times [2018-09-23 21:26:43,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:43,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:43,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:43,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:43,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 754 proven. 1218 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-23 21:26:44,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:44,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:44,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:44,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:26:44,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:44,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 812 proven. 126 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-09-23 21:26:44,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:44,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 41 [2018-09-23 21:26:44,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:26:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:26:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:26:44,725 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 41 states. [2018-09-23 21:26:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:44,947 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2018-09-23 21:26:44,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:26:44,947 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 115 [2018-09-23 21:26:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:44,948 INFO L225 Difference]: With dead ends: 154 [2018-09-23 21:26:44,948 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:26:44,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:26:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:26:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-09-23 21:26:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-23 21:26:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2018-09-23 21:26:44,958 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 115 [2018-09-23 21:26:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:44,958 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2018-09-23 21:26:44,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:26:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2018-09-23 21:26:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-23 21:26:44,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:44,959 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 29, 10, 1, 1, 1] [2018-09-23 21:26:44,960 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:44,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:44,960 INFO L82 PathProgramCache]: Analyzing trace with hash -291193188, now seen corresponding path program 28 times [2018-09-23 21:26:44,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:44,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:44,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:44,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:44,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-23 21:26:46,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:46,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:46,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:46,355 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:46,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:46,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-23 21:26:46,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:46,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:26:46,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:26:46,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:26:46,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:26:46,409 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 32 states. [2018-09-23 21:26:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:46,569 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2018-09-23 21:26:46,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:26:46,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 121 [2018-09-23 21:26:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:46,571 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:26:46,571 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 21:26:46,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:26:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 21:26:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 21:26:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 21:26:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-09-23 21:26:46,579 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 121 [2018-09-23 21:26:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:46,579 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-09-23 21:26:46,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:26:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-09-23 21:26:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 21:26:46,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:46,581 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 30, 10, 1, 1, 1] [2018-09-23 21:26:46,581 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:46,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1151252089, now seen corresponding path program 29 times [2018-09-23 21:26:46,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:46,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:46,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:46,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:46,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-23 21:26:47,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:47,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:47,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:47,159 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-09-23 21:26:47,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:47,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-23 21:26:47,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:47,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:26:47,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:26:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:26:47,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:26:47,205 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 33 states. [2018-09-23 21:26:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:47,381 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2018-09-23 21:26:47,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:26:47,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2018-09-23 21:26:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:47,382 INFO L225 Difference]: With dead ends: 162 [2018-09-23 21:26:47,382 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 21:26:47,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:26:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 21:26:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-23 21:26:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-23 21:26:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2018-09-23 21:26:47,390 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 124 [2018-09-23 21:26:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:47,390 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2018-09-23 21:26:47,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:26:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2018-09-23 21:26:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-23 21:26:47,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:47,391 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 31, 10, 1, 1, 1] [2018-09-23 21:26:47,391 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:47,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash 608916156, now seen corresponding path program 30 times [2018-09-23 21:26:47,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:47,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:47,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:47,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:47,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 928 proven. 1488 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-23 21:26:48,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:48,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:48,076 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:48,126 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-09-23 21:26:48,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:48,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 992 proven. 155 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-09-23 21:26:48,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:48,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 45 [2018-09-23 21:26:48,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:26:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:26:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:26:48,459 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 45 states. [2018-09-23 21:26:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:48,670 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2018-09-23 21:26:48,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:26:48,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 127 [2018-09-23 21:26:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:48,671 INFO L225 Difference]: With dead ends: 169 [2018-09-23 21:26:48,671 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 21:26:48,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:26:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 21:26:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-09-23 21:26:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 21:26:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2018-09-23 21:26:48,680 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 127 [2018-09-23 21:26:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:48,680 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2018-09-23 21:26:48,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:26:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2018-09-23 21:26:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 21:26:48,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:48,681 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 32, 11, 1, 1, 1] [2018-09-23 21:26:48,681 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:48,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash 918148890, now seen corresponding path program 31 times [2018-09-23 21:26:48,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:48,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:48,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:48,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:48,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-23 21:26:49,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:49,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:49,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:49,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-23 21:26:49,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:49,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:26:49,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:26:49,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:26:49,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:26:49,285 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 35 states. [2018-09-23 21:26:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:49,417 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2018-09-23 21:26:49,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:26:49,417 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2018-09-23 21:26:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:49,418 INFO L225 Difference]: With dead ends: 174 [2018-09-23 21:26:49,418 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 21:26:49,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:26:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 21:26:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 21:26:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 21:26:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2018-09-23 21:26:49,426 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 133 [2018-09-23 21:26:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:49,426 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2018-09-23 21:26:49,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:26:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2018-09-23 21:26:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 21:26:49,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:49,427 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 33, 11, 1, 1, 1] [2018-09-23 21:26:49,427 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:49,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1564367237, now seen corresponding path program 32 times [2018-09-23 21:26:49,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:49,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:49,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:49,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:49,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-23 21:26:50,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:50,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:50,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:50,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:50,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:50,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-23 21:26:50,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:50,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:26:50,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:26:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:26:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:26:50,257 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 36 states. [2018-09-23 21:26:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:50,534 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2018-09-23 21:26:50,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:26:50,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2018-09-23 21:26:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:50,535 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:26:50,536 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 21:26:50,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:26:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 21:26:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-23 21:26:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 21:26:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2018-09-23 21:26:50,543 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 136 [2018-09-23 21:26:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:50,543 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2018-09-23 21:26:50,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:26:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2018-09-23 21:26:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-23 21:26:50,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:50,544 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 34, 11, 1, 1, 1] [2018-09-23 21:26:50,545 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:50,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:50,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1283245254, now seen corresponding path program 33 times [2018-09-23 21:26:50,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:50,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:50,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:50,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:50,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1120 proven. 1785 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-23 21:26:51,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:51,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:51,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:51,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:26:51,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:51,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1190 proven. 187 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-09-23 21:26:52,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:52,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 49 [2018-09-23 21:26:52,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:26:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:26:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:26:52,406 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 49 states. [2018-09-23 21:26:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:52,763 INFO L93 Difference]: Finished difference Result 184 states and 210 transitions. [2018-09-23 21:26:52,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:26:52,764 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 139 [2018-09-23 21:26:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:52,765 INFO L225 Difference]: With dead ends: 184 [2018-09-23 21:26:52,765 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:26:52,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:26:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:26:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-09-23 21:26:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-23 21:26:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2018-09-23 21:26:52,773 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 139 [2018-09-23 21:26:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:52,773 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2018-09-23 21:26:52,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:26:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2018-09-23 21:26:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-23 21:26:52,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:52,774 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 35, 12, 1, 1, 1] [2018-09-23 21:26:52,774 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:52,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1757982300, now seen corresponding path program 34 times [2018-09-23 21:26:52,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:52,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:52,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:52,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:52,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-23 21:26:53,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:53,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:53,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:53,832 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:53,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:53,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-23 21:26:53,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:53,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:26:53,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:26:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:26:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:26:53,882 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand 38 states. [2018-09-23 21:26:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:54,110 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2018-09-23 21:26:54,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:26:54,111 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 145 [2018-09-23 21:26:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:54,112 INFO L225 Difference]: With dead ends: 189 [2018-09-23 21:26:54,112 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:26:54,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:26:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:26:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 21:26:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:26:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2018-09-23 21:26:54,121 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 145 [2018-09-23 21:26:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:54,122 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2018-09-23 21:26:54,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:26:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2018-09-23 21:26:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:26:54,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:54,123 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 36, 12, 1, 1, 1] [2018-09-23 21:26:54,123 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:54,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash 593356871, now seen corresponding path program 35 times [2018-09-23 21:26:54,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:54,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:54,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-23 21:26:55,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:55,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:55,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:55,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:26:55,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:55,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-23 21:26:55,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:55,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:26:55,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:26:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:26:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:26:55,704 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 39 states. [2018-09-23 21:26:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:55,883 INFO L93 Difference]: Finished difference Result 192 states and 217 transitions. [2018-09-23 21:26:55,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:26:55,884 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2018-09-23 21:26:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:55,885 INFO L225 Difference]: With dead ends: 192 [2018-09-23 21:26:55,885 INFO L226 Difference]: Without dead ends: 152 [2018-09-23 21:26:55,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:26:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-23 21:26:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-23 21:26:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-23 21:26:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2018-09-23 21:26:55,892 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 148 [2018-09-23 21:26:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:55,893 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2018-09-23 21:26:55,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:26:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2018-09-23 21:26:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-23 21:26:55,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:55,894 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 37, 12, 1, 1, 1] [2018-09-23 21:26:55,894 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:55,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:55,894 INFO L82 PathProgramCache]: Analyzing trace with hash -16981380, now seen corresponding path program 36 times [2018-09-23 21:26:55,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:55,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:55,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:55,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:55,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1330 proven. 2109 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-23 21:26:56,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:56,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:56,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:56,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-23 21:26:56,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:56,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1406 proven. 222 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2018-09-23 21:26:57,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:57,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 15] total 53 [2018-09-23 21:26:57,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:26:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:26:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:26:57,540 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand 53 states. [2018-09-23 21:26:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:57,920 INFO L93 Difference]: Finished difference Result 199 states and 227 transitions. [2018-09-23 21:26:57,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:26:57,920 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 151 [2018-09-23 21:26:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:57,922 INFO L225 Difference]: With dead ends: 199 [2018-09-23 21:26:57,922 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:26:57,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:26:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:26:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-09-23 21:26:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 21:26:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 171 transitions. [2018-09-23 21:26:57,929 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 171 transitions. Word has length 151 [2018-09-23 21:26:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:57,929 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 171 transitions. [2018-09-23 21:26:57,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:26:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 171 transitions. [2018-09-23 21:26:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-23 21:26:57,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:57,930 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 38, 13, 1, 1, 1] [2018-09-23 21:26:57,930 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:57,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash 758997082, now seen corresponding path program 37 times [2018-09-23 21:26:57,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:57,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:57,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:57,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:57,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-23 21:26:58,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:58,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:58,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:58,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-23 21:26:58,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:58,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:26:58,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:26:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:26:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:26:58,878 INFO L87 Difference]: Start difference. First operand 158 states and 171 transitions. Second operand 41 states. [2018-09-23 21:26:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:59,128 INFO L93 Difference]: Finished difference Result 204 states and 231 transitions. [2018-09-23 21:26:59,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:26:59,128 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 157 [2018-09-23 21:26:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:59,130 INFO L225 Difference]: With dead ends: 204 [2018-09-23 21:26:59,130 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 21:26:59,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:26:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 21:26:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 21:26:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 21:26:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2018-09-23 21:26:59,138 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 157 [2018-09-23 21:26:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:59,138 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2018-09-23 21:26:59,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:26:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2018-09-23 21:26:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 21:26:59,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:59,140 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 39, 13, 1, 1, 1] [2018-09-23 21:26:59,140 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:59,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:59,140 INFO L82 PathProgramCache]: Analyzing trace with hash -821292603, now seen corresponding path program 38 times [2018-09-23 21:26:59,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:59,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:59,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:59,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:59,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-23 21:27:00,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:00,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:00,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:00,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:00,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:00,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-23 21:27:00,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:00,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:27:00,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:27:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:27:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:27:00,689 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 42 states. [2018-09-23 21:27:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:00,887 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2018-09-23 21:27:00,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:27:00,887 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 160 [2018-09-23 21:27:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:00,889 INFO L225 Difference]: With dead ends: 207 [2018-09-23 21:27:00,889 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 21:27:00,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:27:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 21:27:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-23 21:27:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 21:27:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2018-09-23 21:27:00,897 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 160 [2018-09-23 21:27:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:00,898 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2018-09-23 21:27:00,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:27:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2018-09-23 21:27:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 21:27:00,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:00,899 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 40, 13, 1, 1, 1] [2018-09-23 21:27:00,899 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:00,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2094766982, now seen corresponding path program 39 times [2018-09-23 21:27:00,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:00,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:00,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:00,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:00,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1558 proven. 2460 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-23 21:27:02,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:02,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:02,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:02,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:27:02,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:02,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1640 proven. 260 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2018-09-23 21:27:03,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:03,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 16] total 57 [2018-09-23 21:27:03,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:27:03,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:27:03,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:27:03,282 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand 57 states. [2018-09-23 21:27:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:03,759 INFO L93 Difference]: Finished difference Result 214 states and 244 transitions. [2018-09-23 21:27:03,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:27:03,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 163 [2018-09-23 21:27:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:03,761 INFO L225 Difference]: With dead ends: 214 [2018-09-23 21:27:03,761 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:27:03,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:27:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:27:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-09-23 21:27:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-23 21:27:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2018-09-23 21:27:03,769 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 163 [2018-09-23 21:27:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:03,769 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2018-09-23 21:27:03,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:27:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2018-09-23 21:27:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-23 21:27:03,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:03,771 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 41, 14, 1, 1, 1] [2018-09-23 21:27:03,771 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:03,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1878872548, now seen corresponding path program 40 times [2018-09-23 21:27:03,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:03,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:03,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:03,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:03,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-23 21:27:04,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:04,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:04,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:04,671 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:04,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:04,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-23 21:27:04,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:04,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:27:04,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:27:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:27:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:27:04,744 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 44 states. [2018-09-23 21:27:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:04,965 INFO L93 Difference]: Finished difference Result 219 states and 248 transitions. [2018-09-23 21:27:04,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:27:04,965 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 169 [2018-09-23 21:27:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:04,966 INFO L225 Difference]: With dead ends: 219 [2018-09-23 21:27:04,966 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:27:04,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:27:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:27:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 21:27:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 21:27:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2018-09-23 21:27:04,975 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 169 [2018-09-23 21:27:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:04,975 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2018-09-23 21:27:04,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:27:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2018-09-23 21:27:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 21:27:04,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:04,976 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 42, 14, 1, 1, 1] [2018-09-23 21:27:04,976 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:04,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:04,977 INFO L82 PathProgramCache]: Analyzing trace with hash 890476295, now seen corresponding path program 41 times [2018-09-23 21:27:04,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:04,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:04,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:04,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:04,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-23 21:27:05,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:05,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:05,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:27:06,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2018-09-23 21:27:06,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:06,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-23 21:27:06,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:06,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:27:06,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:27:06,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:27:06,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:27:06,116 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand 45 states. [2018-09-23 21:27:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:06,285 INFO L93 Difference]: Finished difference Result 222 states and 251 transitions. [2018-09-23 21:27:06,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:27:06,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 172 [2018-09-23 21:27:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:06,287 INFO L225 Difference]: With dead ends: 222 [2018-09-23 21:27:06,288 INFO L226 Difference]: Without dead ends: 176 [2018-09-23 21:27:06,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:27:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-23 21:27:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-23 21:27:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-23 21:27:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2018-09-23 21:27:06,295 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 172 [2018-09-23 21:27:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:06,295 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2018-09-23 21:27:06,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:27:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2018-09-23 21:27:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-23 21:27:06,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:06,296 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 43, 14, 1, 1, 1] [2018-09-23 21:27:06,296 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:06,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash 535069244, now seen corresponding path program 42 times [2018-09-23 21:27:06,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:06,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:06,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:06,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:06,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1804 proven. 2838 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-23 21:27:07,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:07,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:07,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:07,412 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2018-09-23 21:27:07,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:07,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1892 proven. 301 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2018-09-23 21:27:08,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:08,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 17] total 61 [2018-09-23 21:27:08,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:27:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:27:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:27:08,358 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand 61 states. [2018-09-23 21:27:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:08,728 INFO L93 Difference]: Finished difference Result 229 states and 261 transitions. [2018-09-23 21:27:08,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:27:08,728 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 175 [2018-09-23 21:27:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:08,729 INFO L225 Difference]: With dead ends: 229 [2018-09-23 21:27:08,730 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:27:08,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:27:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:27:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-09-23 21:27:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-23 21:27:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2018-09-23 21:27:08,735 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 175 [2018-09-23 21:27:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:08,736 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2018-09-23 21:27:08,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:27:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2018-09-23 21:27:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-23 21:27:08,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:08,737 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 44, 15, 1, 1, 1] [2018-09-23 21:27:08,737 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:08,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1003346330, now seen corresponding path program 43 times [2018-09-23 21:27:08,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:08,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:08,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:08,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:08,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-23 21:27:09,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:09,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:09,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:09,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-23 21:27:09,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:09,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:27:09,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:27:09,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:27:09,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:27:09,977 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand 47 states. [2018-09-23 21:27:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:10,135 INFO L93 Difference]: Finished difference Result 234 states and 265 transitions. [2018-09-23 21:27:10,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:27:10,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 181 [2018-09-23 21:27:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:10,137 INFO L225 Difference]: With dead ends: 234 [2018-09-23 21:27:10,137 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 21:27:10,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:27:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 21:27:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 21:27:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 21:27:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2018-09-23 21:27:10,143 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 181 [2018-09-23 21:27:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:10,144 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2018-09-23 21:27:10,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:27:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2018-09-23 21:27:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 21:27:10,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:10,145 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 45, 15, 1, 1, 1] [2018-09-23 21:27:10,145 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:10,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2030680581, now seen corresponding path program 44 times [2018-09-23 21:27:10,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:10,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:10,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:10,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:10,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-23 21:27:11,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:11,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:11,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:11,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:11,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:11,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-23 21:27:11,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:11,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:27:11,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:27:11,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:27:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:27:11,506 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 48 states. [2018-09-23 21:27:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:12,671 INFO L93 Difference]: Finished difference Result 237 states and 268 transitions. [2018-09-23 21:27:12,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:27:12,671 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 184 [2018-09-23 21:27:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:12,673 INFO L225 Difference]: With dead ends: 237 [2018-09-23 21:27:12,673 INFO L226 Difference]: Without dead ends: 188 [2018-09-23 21:27:12,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:27:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-23 21:27:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-09-23 21:27:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-09-23 21:27:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2018-09-23 21:27:12,682 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 184 [2018-09-23 21:27:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:12,682 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2018-09-23 21:27:12,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:27:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2018-09-23 21:27:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-23 21:27:12,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:12,683 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 46, 15, 1, 1, 1] [2018-09-23 21:27:12,683 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:12,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:12,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1408400826, now seen corresponding path program 45 times [2018-09-23 21:27:12,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:12,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:12,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:12,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:12,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2068 proven. 3243 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-23 21:27:13,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:13,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:13,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:13,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:27:13,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:13,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2162 proven. 345 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-09-23 21:27:14,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:14,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 18] total 65 [2018-09-23 21:27:14,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:27:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:27:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:27:14,883 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 65 states. [2018-09-23 21:27:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:15,230 INFO L93 Difference]: Finished difference Result 244 states and 278 transitions. [2018-09-23 21:27:15,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:27:15,231 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 187 [2018-09-23 21:27:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:15,232 INFO L225 Difference]: With dead ends: 244 [2018-09-23 21:27:15,232 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:27:15,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:27:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:27:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-09-23 21:27:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-23 21:27:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2018-09-23 21:27:15,239 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 187 [2018-09-23 21:27:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:15,239 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2018-09-23 21:27:15,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:27:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2018-09-23 21:27:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-23 21:27:15,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:15,240 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 47, 16, 1, 1, 1] [2018-09-23 21:27:15,241 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:15,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash -622412324, now seen corresponding path program 46 times [2018-09-23 21:27:15,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:15,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:15,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:15,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:15,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-23 21:27:16,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:16,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:16,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:16,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:16,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:16,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-23 21:27:16,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:16,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:27:16,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:27:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:27:16,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:27:16,831 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand 50 states. [2018-09-23 21:27:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:17,226 INFO L93 Difference]: Finished difference Result 249 states and 282 transitions. [2018-09-23 21:27:17,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:27:17,227 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 193 [2018-09-23 21:27:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:17,228 INFO L225 Difference]: With dead ends: 249 [2018-09-23 21:27:17,228 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 21:27:17,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:27:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 21:27:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 21:27:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 21:27:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2018-09-23 21:27:17,235 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 193 [2018-09-23 21:27:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:17,235 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2018-09-23 21:27:17,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:27:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2018-09-23 21:27:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 21:27:17,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:17,236 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 48, 16, 1, 1, 1] [2018-09-23 21:27:17,236 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:17,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:17,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1846957511, now seen corresponding path program 47 times [2018-09-23 21:27:17,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:17,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:17,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:17,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:17,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-23 21:27:18,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:18,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:18,613 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:27:18,714 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-09-23 21:27:18,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:18,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-23 21:27:18,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:18,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:27:18,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:27:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:27:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:27:18,774 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 51 states. [2018-09-23 21:27:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:19,938 INFO L93 Difference]: Finished difference Result 252 states and 285 transitions. [2018-09-23 21:27:19,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:27:19,938 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 196 [2018-09-23 21:27:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:19,940 INFO L225 Difference]: With dead ends: 252 [2018-09-23 21:27:19,940 INFO L226 Difference]: Without dead ends: 200 [2018-09-23 21:27:19,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:27:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-23 21:27:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-23 21:27:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-23 21:27:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2018-09-23 21:27:19,948 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 196 [2018-09-23 21:27:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:19,949 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2018-09-23 21:27:19,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:27:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2018-09-23 21:27:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-23 21:27:19,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:19,950 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 49, 16, 1, 1, 1] [2018-09-23 21:27:19,950 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:19,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1651101188, now seen corresponding path program 48 times [2018-09-23 21:27:19,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:19,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:19,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2350 proven. 3675 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-23 21:27:21,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:21,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:21,265 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:21,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-23 21:27:21,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:21,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2450 proven. 392 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-09-23 21:27:22,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:22,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 19] total 69 [2018-09-23 21:27:22,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:27:22,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:27:22,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:27:22,071 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand 69 states. [2018-09-23 21:27:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:22,472 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2018-09-23 21:27:22,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:27:22,473 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 199 [2018-09-23 21:27:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:22,474 INFO L225 Difference]: With dead ends: 259 [2018-09-23 21:27:22,475 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 21:27:22,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:27:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 21:27:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-09-23 21:27:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-23 21:27:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 223 transitions. [2018-09-23 21:27:22,484 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 223 transitions. Word has length 199 [2018-09-23 21:27:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:22,485 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 223 transitions. [2018-09-23 21:27:22,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:27:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 223 transitions. [2018-09-23 21:27:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-23 21:27:22,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:22,486 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 50, 17, 1, 1, 1] [2018-09-23 21:27:22,486 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:22,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1403567398, now seen corresponding path program 49 times [2018-09-23 21:27:22,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:22,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:22,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 2832 proven. 551 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-23 21:27:22,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:22,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:22,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:22,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:24,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:24,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 69] total 72 [2018-09-23 21:27:24,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:27:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:27:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:27:24,891 INFO L87 Difference]: Start difference. First operand 206 states and 223 transitions. Second operand 72 states. [2018-09-23 21:27:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:25,196 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2018-09-23 21:27:25,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:27:25,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 205 [2018-09-23 21:27:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:25,199 INFO L225 Difference]: With dead ends: 218 [2018-09-23 21:27:25,199 INFO L226 Difference]: Without dead ends: 216 [2018-09-23 21:27:25,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:27:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-23 21:27:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-09-23 21:27:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 21:27:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 235 transitions. [2018-09-23 21:27:25,208 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 235 transitions. Word has length 205 [2018-09-23 21:27:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:25,208 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 235 transitions. [2018-09-23 21:27:25,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:27:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 235 transitions. [2018-09-23 21:27:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-23 21:27:25,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:25,210 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 50, 20, 1, 1, 1] [2018-09-23 21:27:25,210 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:25,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash 29832167, now seen corresponding path program 50 times [2018-09-23 21:27:25,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:25,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:25,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:25,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:25,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 3264 proven. 737 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-23 21:27:25,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:25,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:25,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:25,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:25,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:25,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:26,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:26,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 72] total 75 [2018-09-23 21:27:26,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:27:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:27:26,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:27:26,717 INFO L87 Difference]: Start difference. First operand 215 states and 235 transitions. Second operand 75 states. [2018-09-23 21:27:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:27,063 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2018-09-23 21:27:27,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:27:27,064 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 214 [2018-09-23 21:27:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:27,065 INFO L225 Difference]: With dead ends: 227 [2018-09-23 21:27:27,065 INFO L226 Difference]: Without dead ends: 225 [2018-09-23 21:27:27,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:27:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-23 21:27:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-09-23 21:27:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-23 21:27:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 247 transitions. [2018-09-23 21:27:27,073 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 247 transitions. Word has length 214 [2018-09-23 21:27:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:27,074 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 247 transitions. [2018-09-23 21:27:27,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:27:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 247 transitions. [2018-09-23 21:27:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-23 21:27:27,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:27,075 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 50, 23, 1, 1, 1] [2018-09-23 21:27:27,076 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:27,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -462347910, now seen corresponding path program 51 times [2018-09-23 21:27:27,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:27,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:27,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:27,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:27,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3696 proven. 950 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-23 21:27:28,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:28,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:28,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:28,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:27:28,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:28,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3550 proven. 805 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-09-23 21:27:28,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:28,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 28 [2018-09-23 21:27:28,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:27:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:27:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:27:28,231 INFO L87 Difference]: Start difference. First operand 224 states and 247 transitions. Second operand 28 states. [2018-09-23 21:27:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:28,547 INFO L93 Difference]: Finished difference Result 236 states and 265 transitions. [2018-09-23 21:27:28,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:27:28,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 223 [2018-09-23 21:27:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:28,548 INFO L225 Difference]: With dead ends: 236 [2018-09-23 21:27:28,548 INFO L226 Difference]: Without dead ends: 234 [2018-09-23 21:27:28,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:27:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-23 21:27:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-09-23 21:27:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-23 21:27:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 259 transitions. [2018-09-23 21:27:28,558 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 259 transitions. Word has length 223 [2018-09-23 21:27:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:28,558 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 259 transitions. [2018-09-23 21:27:28,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:27:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 259 transitions. [2018-09-23 21:27:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-23 21:27:28,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:28,560 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 50, 26, 1, 1, 1] [2018-09-23 21:27:28,560 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:28,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash 869124423, now seen corresponding path program 52 times [2018-09-23 21:27:28,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:28,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:28,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 4128 proven. 1190 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-23 21:27:28,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:28,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:28,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:29,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:29,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:29,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:30,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:30,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 78] total 81 [2018-09-23 21:27:30,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:27:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:27:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:27:30,133 INFO L87 Difference]: Start difference. First operand 233 states and 259 transitions. Second operand 81 states. [2018-09-23 21:27:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:30,808 INFO L93 Difference]: Finished difference Result 245 states and 277 transitions. [2018-09-23 21:27:30,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:27:30,808 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 232 [2018-09-23 21:27:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:30,809 INFO L225 Difference]: With dead ends: 245 [2018-09-23 21:27:30,809 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 21:27:30,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:27:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 21:27:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-09-23 21:27:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-23 21:27:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 271 transitions. [2018-09-23 21:27:30,816 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 271 transitions. Word has length 232 [2018-09-23 21:27:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:30,816 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 271 transitions. [2018-09-23 21:27:30,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:27:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 271 transitions. [2018-09-23 21:27:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-09-23 21:27:30,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:30,817 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 50, 29, 1, 1, 1] [2018-09-23 21:27:30,818 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:30,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash -208889830, now seen corresponding path program 53 times [2018-09-23 21:27:30,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:30,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:30,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:30,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:30,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4560 proven. 1457 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-23 21:27:31,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:31,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:31,422 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:27:31,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2018-09-23 21:27:31,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:31,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4470 proven. 3626 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2018-09-23 21:27:32,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:32,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 52] total 52 [2018-09-23 21:27:32,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:27:32,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:27:32,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:27:32,522 INFO L87 Difference]: Start difference. First operand 242 states and 271 transitions. Second operand 52 states. [2018-09-23 21:27:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:32,858 INFO L93 Difference]: Finished difference Result 307 states and 377 transitions. [2018-09-23 21:27:32,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:27:32,858 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 241 [2018-09-23 21:27:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:32,859 INFO L225 Difference]: With dead ends: 307 [2018-09-23 21:27:32,859 INFO L226 Difference]: Without dead ends: 305 [2018-09-23 21:27:32,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:27:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-09-23 21:27:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-09-23 21:27:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-23 21:27:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 355 transitions. [2018-09-23 21:27:32,867 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 355 transitions. Word has length 241 [2018-09-23 21:27:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:32,868 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 355 transitions. [2018-09-23 21:27:32,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:27:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 355 transitions. [2018-09-23 21:27:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-23 21:27:32,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:32,870 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 50, 50, 1, 1, 1] [2018-09-23 21:27:32,870 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:32,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 602025671, now seen corresponding path program 54 times [2018-09-23 21:27:32,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:32,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:32,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-09-23 21:27:35,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:35,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:35,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:35,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 101 check-sat command(s) [2018-09-23 21:27:35,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:35,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-09-23 21:27:36,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:36,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:27:36,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:27:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:27:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:27:36,360 INFO L87 Difference]: Start difference. First operand 305 states and 355 transitions. Second operand 53 states. [2018-09-23 21:27:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:38,782 INFO L93 Difference]: Finished difference Result 4284 states and 5659 transitions. [2018-09-23 21:27:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:27:38,782 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 304 [2018-09-23 21:27:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:38,797 INFO L225 Difference]: With dead ends: 4284 [2018-09-23 21:27:38,797 INFO L226 Difference]: Without dead ends: 4282 [2018-09-23 21:27:38,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:27:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2018-09-23 21:27:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 308. [2018-09-23 21:27:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-09-23 21:27:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 359 transitions. [2018-09-23 21:27:38,954 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 359 transitions. Word has length 304 [2018-09-23 21:27:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:38,954 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 359 transitions. [2018-09-23 21:27:38,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:27:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 359 transitions. [2018-09-23 21:27:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-09-23 21:27:38,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:38,956 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 51, 50, 1, 1, 1] [2018-09-23 21:27:38,956 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:38,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash -834605638, now seen corresponding path program 55 times [2018-09-23 21:27:38,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:38,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:38,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:38,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:38,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 11527 proven. 0 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-09-23 21:27:40,525 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:27:40,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-09-23 21:27:40,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:27:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:27:40,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:27:40,526 INFO L87 Difference]: Start difference. First operand 308 states and 359 transitions. Second operand 52 states. [2018-09-23 21:27:40,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:40,894 INFO L93 Difference]: Finished difference Result 457 states and 557 transitions. [2018-09-23 21:27:40,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:27:40,895 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 307 [2018-09-23 21:27:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:40,896 INFO L225 Difference]: With dead ends: 457 [2018-09-23 21:27:40,896 INFO L226 Difference]: Without dead ends: 0 [2018-09-23 21:27:40,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:27:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-23 21:27:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-23 21:27:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-23 21:27:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-23 21:27:40,898 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 307 [2018-09-23 21:27:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:40,899 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-23 21:27:40,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:27:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-23 21:27:40,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-23 21:27:40,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-23 21:27:41,732 WARN L178 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-09-23 21:27:42,379 WARN L178 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 1827 DAG size of output: 400 [2018-09-23 21:27:42,927 WARN L178 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-09-23 21:27:46,415 WARN L178 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-09-23 21:27:48,076 WARN L178 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2018-09-23 21:27:49,817 WARN L178 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-09-23 21:27:49,823 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-09-23 21:27:49,824 INFO L422 ceAbstractionStarter]: At program point L32(lines 29 38) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~4 96) (<= 96 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 96)) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= 79 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 79) (<= 79 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 79))) (and (and (<= ULTIMATE.start_main_~y~4 97) (<= ULTIMATE.start_main_~x~4 97) (<= 97 ULTIMATE.start_main_~y~4)) (<= 97 ULTIMATE.start_main_~x~4)) (and (and (<= 95 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 95) (<= ULTIMATE.start_main_~x~4 95)) (<= 95 ULTIMATE.start_main_~x~4)) (and (and (<= 91 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 91) (<= ULTIMATE.start_main_~y~4 91)) (<= 91 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 72) (<= 72 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 72)) (<= 72 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 62) (<= 62 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 62)) (<= 62 ULTIMATE.start_main_~x~4)) (and (<= 54 ULTIMATE.start_main_~x~4) (and (<= 54 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 54) (<= ULTIMATE.start_main_~y~4 54))) (and (<= 60 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 60) (<= ULTIMATE.start_main_~x~4 60) (<= 60 ULTIMATE.start_main_~y~4))) (and (<= 98 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 98) (<= ULTIMATE.start_main_~y~4 98) (<= 98 ULTIMATE.start_main_~y~4))) (and (and (<= 88 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 88) (<= ULTIMATE.start_main_~x~4 88)) (<= 88 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 73)) (<= 73 ULTIMATE.start_main_~x~4)) (and (<= 64 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 64))) (and (and (<= ULTIMATE.start_main_~x~4 76) (<= 76 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 76)) (<= 76 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 84) (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~y~4)) (<= 84 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 85) (<= 85 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 85)) (<= 85 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 61) (<= 61 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 61)) (<= 61 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 59) (<= ULTIMATE.start_main_~y~4 59) (<= 59 ULTIMATE.start_main_~y~4)) (<= 59 ULTIMATE.start_main_~x~4)) (and (<= 69 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 69) (<= ULTIMATE.start_main_~x~4 69) (<= 69 ULTIMATE.start_main_~y~4))) (and (and (<= 55 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 55) (<= ULTIMATE.start_main_~x~4 55)) (<= 55 ULTIMATE.start_main_~x~4)) (and (and (<= 99 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 99) (<= ULTIMATE.start_main_~x~4 99)) (<= 99 ULTIMATE.start_main_~x~4)) (and (<= 53 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 53) (<= ULTIMATE.start_main_~y~4 53) (<= 53 ULTIMATE.start_main_~y~4))) (and (<= 77 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 77) (<= ULTIMATE.start_main_~y~4 77) (<= 77 ULTIMATE.start_main_~y~4))) (and (<= 89 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 89) (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~y~4))) (and (<= 94 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 94) (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 93) (<= 93 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 93)) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= 68 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 68) (<= ULTIMATE.start_main_~y~4 68) (<= 68 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 81) (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~y~4)) (<= 81 ULTIMATE.start_main_~x~4)) (and (and (<= 57 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 57) (<= ULTIMATE.start_main_~x~4 57)) (<= 57 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 82)) (<= 82 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 58) (<= ULTIMATE.start_main_~x~4 58) (<= 58 ULTIMATE.start_main_~y~4)) (<= 58 ULTIMATE.start_main_~x~4)) (and (<= 78 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 78))) (and (and (<= ULTIMATE.start_main_~y~4 65) (<= ULTIMATE.start_main_~x~4 65) (<= 65 ULTIMATE.start_main_~y~4)) (<= 65 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 90)) (<= 90 ULTIMATE.start_main_~x~4)) (and (<= 63 ULTIMATE.start_main_~x~4) (and (<= 63 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 63) (<= ULTIMATE.start_main_~x~4 63))) (and (<= 51 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 51) (<= 51 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 51))) (and (<= 52 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 52))) (and (and (<= 74 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 74) (<= ULTIMATE.start_main_~y~4 74)) (<= 74 ULTIMATE.start_main_~x~4)) (and (<= 86 ULTIMATE.start_main_~x~4) (and (<= 86 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 86) (<= ULTIMATE.start_main_~x~4 86))) (and (<= 56 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 56) (<= ULTIMATE.start_main_~x~4 56) (<= 56 ULTIMATE.start_main_~y~4))) (and (<= 67 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 67) (<= 67 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 67))) (and (<= 83 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 83) (<= 83 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 83))) (and (and (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 87)) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) (and (<= 66 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 66) (<= ULTIMATE.start_main_~x~4 66))) (and (and (<= 80 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 80) (<= ULTIMATE.start_main_~y~4 80)) (<= 80 ULTIMATE.start_main_~x~4)) (and (<= 70 ULTIMATE.start_main_~x~4) (and (<= 70 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 70) (<= ULTIMATE.start_main_~y~4 70))) (and (<= 71 ULTIMATE.start_main_~x~4) (and (<= 71 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 71) (<= ULTIMATE.start_main_~y~4 71))) (and (and (<= ULTIMATE.start_main_~x~4 75) (<= ULTIMATE.start_main_~y~4 75) (<= 75 ULTIMATE.start_main_~y~4)) (<= 75 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~y~4)) (and (and (<= ULTIMATE.start_main_~x~4 92) (<= 92 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 92)) (<= 92 ULTIMATE.start_main_~x~4))) [2018-09-23 21:27:49,825 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 43) no Hoare annotation was computed. [2018-09-23 21:27:49,825 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-09-23 21:27:49,825 INFO L422 ceAbstractionStarter]: At program point L26(lines 26 30) the Hoare annotation is: false [2018-09-23 21:27:49,826 INFO L422 ceAbstractionStarter]: At program point L16(lines 16 27) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~4 96) (<= 96 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 96)) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= 79 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 79) (<= 79 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 79))) (and (and (<= ULTIMATE.start_main_~y~4 97) (<= ULTIMATE.start_main_~x~4 97) (<= 97 ULTIMATE.start_main_~y~4)) (<= 97 ULTIMATE.start_main_~x~4)) (and (and (<= 95 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 95) (<= ULTIMATE.start_main_~x~4 95)) (<= 95 ULTIMATE.start_main_~x~4)) (and (and (<= 91 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 91) (<= ULTIMATE.start_main_~y~4 91)) (<= 91 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 72) (<= 72 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 72)) (<= 72 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 62) (<= 62 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 62)) (<= 62 ULTIMATE.start_main_~x~4)) (and (<= 54 ULTIMATE.start_main_~x~4) (and (<= 54 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 54) (<= ULTIMATE.start_main_~y~4 54))) (and (<= 60 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 60) (<= ULTIMATE.start_main_~x~4 60) (<= 60 ULTIMATE.start_main_~y~4))) (and (<= 98 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 98) (<= ULTIMATE.start_main_~y~4 98) (<= 98 ULTIMATE.start_main_~y~4))) (and (and (<= 88 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 88) (<= ULTIMATE.start_main_~x~4 88)) (<= 88 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 73)) (<= 73 ULTIMATE.start_main_~x~4)) (and (<= 64 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 64))) (and (and (<= ULTIMATE.start_main_~x~4 76) (<= 76 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 76)) (<= 76 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 84) (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~y~4)) (<= 84 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 85) (<= 85 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 85)) (<= 85 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 61) (<= 61 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 61)) (<= 61 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 59) (<= ULTIMATE.start_main_~y~4 59) (<= 59 ULTIMATE.start_main_~y~4)) (<= 59 ULTIMATE.start_main_~x~4)) (and (<= 69 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 69) (<= ULTIMATE.start_main_~x~4 69) (<= 69 ULTIMATE.start_main_~y~4))) (and (and (<= 55 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 55) (<= ULTIMATE.start_main_~x~4 55)) (<= 55 ULTIMATE.start_main_~x~4)) (and (and (<= 99 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 99) (<= ULTIMATE.start_main_~x~4 99)) (<= 99 ULTIMATE.start_main_~x~4)) (and (<= 53 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 53) (<= ULTIMATE.start_main_~y~4 53) (<= 53 ULTIMATE.start_main_~y~4))) (and (<= 77 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 77) (<= ULTIMATE.start_main_~y~4 77) (<= 77 ULTIMATE.start_main_~y~4))) (and (<= 89 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 89) (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~y~4))) (and (<= 94 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 94) (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 93) (<= 93 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 93)) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= 68 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 68) (<= ULTIMATE.start_main_~y~4 68) (<= 68 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 81) (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~y~4)) (<= 81 ULTIMATE.start_main_~x~4)) (and (and (<= 57 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 57) (<= ULTIMATE.start_main_~x~4 57)) (<= 57 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 82)) (<= 82 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 58) (<= ULTIMATE.start_main_~x~4 58) (<= 58 ULTIMATE.start_main_~y~4)) (<= 58 ULTIMATE.start_main_~x~4)) (and (<= 78 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 78))) (and (and (<= ULTIMATE.start_main_~y~4 65) (<= ULTIMATE.start_main_~x~4 65) (<= 65 ULTIMATE.start_main_~y~4)) (<= 65 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 90)) (<= 90 ULTIMATE.start_main_~x~4)) (and (<= 63 ULTIMATE.start_main_~x~4) (and (<= 63 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 63) (<= ULTIMATE.start_main_~x~4 63))) (and (<= 51 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 51) (<= 51 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 51))) (and (<= 52 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 52))) (and (and (<= 74 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 74) (<= ULTIMATE.start_main_~y~4 74)) (<= 74 ULTIMATE.start_main_~x~4)) (and (<= 86 ULTIMATE.start_main_~x~4) (and (<= 86 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 86) (<= ULTIMATE.start_main_~x~4 86))) (and (<= 56 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 56) (<= ULTIMATE.start_main_~x~4 56) (<= 56 ULTIMATE.start_main_~y~4))) (and (<= 67 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 67) (<= 67 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 67))) (and (<= 83 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 83) (<= 83 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 83))) (and (and (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 87)) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) (and (<= 66 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 66) (<= ULTIMATE.start_main_~x~4 66))) (and (and (<= 80 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 80) (<= ULTIMATE.start_main_~y~4 80)) (<= 80 ULTIMATE.start_main_~x~4)) (and (<= 70 ULTIMATE.start_main_~x~4) (and (<= 70 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 70) (<= ULTIMATE.start_main_~y~4 70))) (and (<= 71 ULTIMATE.start_main_~x~4) (and (<= 71 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 71) (<= ULTIMATE.start_main_~y~4 71))) (and (and (<= ULTIMATE.start_main_~x~4 75) (<= ULTIMATE.start_main_~y~4 75) (<= 75 ULTIMATE.start_main_~y~4)) (<= 75 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 100) (< 99 ULTIMATE.start_main_~y~4)) (<= 100 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~y~4)) (and (and (<= ULTIMATE.start_main_~x~4 92) (<= 92 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 92)) (<= 92 ULTIMATE.start_main_~x~4))) [2018-09-23 21:27:49,827 INFO L422 ceAbstractionStarter]: At program point L42(lines 13 42) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~4 96) (<= 96 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 96)) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= 79 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 79) (<= 79 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 79))) (and (and (<= ULTIMATE.start_main_~y~4 97) (<= ULTIMATE.start_main_~x~4 97) (<= 97 ULTIMATE.start_main_~y~4)) (<= 97 ULTIMATE.start_main_~x~4)) (and (and (<= 95 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 95) (<= ULTIMATE.start_main_~x~4 95)) (<= 95 ULTIMATE.start_main_~x~4)) (and (and (<= 91 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 91) (<= ULTIMATE.start_main_~y~4 91)) (<= 91 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 72) (<= 72 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 72)) (<= 72 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 62) (<= 62 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 62)) (<= 62 ULTIMATE.start_main_~x~4)) (and (<= 54 ULTIMATE.start_main_~x~4) (and (<= 54 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 54) (<= ULTIMATE.start_main_~y~4 54))) (and (<= 60 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 60) (<= ULTIMATE.start_main_~x~4 60) (<= 60 ULTIMATE.start_main_~y~4))) (and (<= 98 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 98) (<= ULTIMATE.start_main_~y~4 98) (<= 98 ULTIMATE.start_main_~y~4))) (and (and (<= 88 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 88) (<= ULTIMATE.start_main_~x~4 88)) (<= 88 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 73)) (<= 73 ULTIMATE.start_main_~x~4)) (and (<= 64 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 64))) (and (and (<= ULTIMATE.start_main_~x~4 76) (<= 76 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 76)) (<= 76 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 84) (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~y~4)) (<= 84 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 85) (<= 85 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 85)) (<= 85 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 61) (<= 61 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 61)) (<= 61 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 59) (<= ULTIMATE.start_main_~y~4 59) (<= 59 ULTIMATE.start_main_~y~4)) (<= 59 ULTIMATE.start_main_~x~4)) (and (<= 69 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 69) (<= ULTIMATE.start_main_~x~4 69) (<= 69 ULTIMATE.start_main_~y~4))) (and (and (<= 55 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 55) (<= ULTIMATE.start_main_~x~4 55)) (<= 55 ULTIMATE.start_main_~x~4)) (and (and (<= 99 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 99) (<= ULTIMATE.start_main_~x~4 99)) (<= 99 ULTIMATE.start_main_~x~4)) (and (<= 53 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 53) (<= ULTIMATE.start_main_~y~4 53) (<= 53 ULTIMATE.start_main_~y~4))) (and (<= 77 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 77) (<= ULTIMATE.start_main_~y~4 77) (<= 77 ULTIMATE.start_main_~y~4))) (and (<= 89 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 89) (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~y~4))) (and (<= 94 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 94) (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 93) (<= 93 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 93)) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= 68 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 68) (<= ULTIMATE.start_main_~y~4 68) (<= 68 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 81) (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~y~4)) (<= 81 ULTIMATE.start_main_~x~4)) (and (and (<= 57 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 57) (<= ULTIMATE.start_main_~x~4 57)) (<= 57 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 82)) (<= 82 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 58) (<= ULTIMATE.start_main_~x~4 58) (<= 58 ULTIMATE.start_main_~y~4)) (<= 58 ULTIMATE.start_main_~x~4)) (and (<= 78 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 78))) (and (and (<= ULTIMATE.start_main_~y~4 65) (<= ULTIMATE.start_main_~x~4 65) (<= 65 ULTIMATE.start_main_~y~4)) (<= 65 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 90)) (<= 90 ULTIMATE.start_main_~x~4)) (and (<= 63 ULTIMATE.start_main_~x~4) (and (<= 63 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 63) (<= ULTIMATE.start_main_~x~4 63))) (and (<= 51 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 51) (<= 51 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 51))) (and (<= 52 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 52))) (and (and (<= 74 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 74) (<= ULTIMATE.start_main_~y~4 74)) (<= 74 ULTIMATE.start_main_~x~4)) (and (<= 86 ULTIMATE.start_main_~x~4) (and (<= 86 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 86) (<= ULTIMATE.start_main_~x~4 86))) (and (<= 56 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 56) (<= ULTIMATE.start_main_~x~4 56) (<= 56 ULTIMATE.start_main_~y~4))) (and (<= 67 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 67) (<= 67 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 67))) (and (<= 83 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 83) (<= 83 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 83))) (and (and (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 87)) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) (and (<= 66 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 66) (<= ULTIMATE.start_main_~x~4 66))) (and (and (<= 80 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 80) (<= ULTIMATE.start_main_~y~4 80)) (<= 80 ULTIMATE.start_main_~x~4)) (and (<= 70 ULTIMATE.start_main_~x~4) (and (<= 70 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 70) (<= ULTIMATE.start_main_~y~4 70))) (and (<= 71 ULTIMATE.start_main_~x~4) (and (<= 71 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 71) (<= ULTIMATE.start_main_~y~4 71))) (and (and (<= ULTIMATE.start_main_~x~4 75) (<= ULTIMATE.start_main_~y~4 75) (<= 75 ULTIMATE.start_main_~y~4)) (<= 75 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 100) (< 99 ULTIMATE.start_main_~y~4)) (<= 100 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~y~4)) (and (and (<= ULTIMATE.start_main_~x~4 92) (<= 92 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 92)) (<= 92 ULTIMATE.start_main_~x~4))) [2018-09-23 21:27:49,827 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2018-09-23 21:27:49,862 INFO L202 PluginConnector]: Adding new model gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:27:49 BoogieIcfgContainer [2018-09-23 21:27:49,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:27:49,863 INFO L168 Benchmark]: Toolchain (without parser) took 85497.09 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 682.6 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -526.8 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-23 21:27:49,864 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:27:49,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:27:49,865 INFO L168 Benchmark]: Boogie Preprocessor took 22.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:27:49,865 INFO L168 Benchmark]: RCFGBuilder took 323.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:27:49,865 INFO L168 Benchmark]: TraceAbstraction took 85098.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 682.6 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -548.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-23 21:27:49,868 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 323.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 85098.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 682.6 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -548.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main_~y~4 <= 96 && 96 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4) || (79 <= main_~x~4 && (main_~y~4 <= 79 && 79 <= main_~y~4) && main_~x~4 <= 79)) || (((main_~y~4 <= 97 && main_~x~4 <= 97) && 97 <= main_~y~4) && 97 <= main_~x~4)) || (((95 <= main_~y~4 && main_~y~4 <= 95) && main_~x~4 <= 95) && 95 <= main_~x~4)) || (((91 <= main_~y~4 && main_~x~4 <= 91) && main_~y~4 <= 91) && 91 <= main_~x~4)) || (((main_~x~4 <= 72 && 72 <= main_~y~4) && main_~y~4 <= 72) && 72 <= main_~x~4)) || (((main_~x~4 <= 62 && 62 <= main_~y~4) && main_~y~4 <= 62) && 62 <= main_~x~4)) || (54 <= main_~x~4 && (54 <= main_~y~4 && main_~x~4 <= 54) && main_~y~4 <= 54)) || (60 <= main_~x~4 && (main_~y~4 <= 60 && main_~x~4 <= 60) && 60 <= main_~y~4)) || (98 <= main_~x~4 && (main_~x~4 <= 98 && main_~y~4 <= 98) && 98 <= main_~y~4)) || (((88 <= main_~y~4 && main_~y~4 <= 88) && main_~x~4 <= 88) && 88 <= main_~x~4)) || (((main_~x~4 <= 73 && 73 <= main_~y~4) && main_~y~4 <= 73) && 73 <= main_~x~4)) || (64 <= main_~x~4 && (main_~x~4 <= 64 && 64 <= main_~y~4) && main_~y~4 <= 64)) || (((main_~x~4 <= 76 && 76 <= main_~y~4) && main_~y~4 <= 76) && 76 <= main_~x~4)) || (((main_~y~4 <= 84 && main_~x~4 <= 84) && 84 <= main_~y~4) && 84 <= main_~x~4)) || (((main_~y~4 <= 85 && 85 <= main_~y~4) && main_~x~4 <= 85) && 85 <= main_~x~4)) || (((main_~x~4 <= 61 && 61 <= main_~y~4) && main_~y~4 <= 61) && 61 <= main_~x~4)) || (((main_~x~4 <= 59 && main_~y~4 <= 59) && 59 <= main_~y~4) && 59 <= main_~x~4)) || (69 <= main_~x~4 && (main_~y~4 <= 69 && main_~x~4 <= 69) && 69 <= main_~y~4)) || (((55 <= main_~y~4 && main_~y~4 <= 55) && main_~x~4 <= 55) && 55 <= main_~x~4)) || (((99 <= main_~y~4 && main_~y~4 <= 99) && main_~x~4 <= 99) && 99 <= main_~x~4)) || (53 <= main_~x~4 && (main_~x~4 <= 53 && main_~y~4 <= 53) && 53 <= main_~y~4)) || (77 <= main_~x~4 && (main_~x~4 <= 77 && main_~y~4 <= 77) && 77 <= main_~y~4)) || (89 <= main_~x~4 && (main_~y~4 <= 89 && main_~x~4 <= 89) && 89 <= main_~y~4)) || (94 <= main_~x~4 && (main_~y~4 <= 94 && main_~x~4 <= 94) && 94 <= main_~y~4)) || (((main_~y~4 <= 93 && 93 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (68 <= main_~x~4 && (main_~x~4 <= 68 && main_~y~4 <= 68) && 68 <= main_~y~4)) || (((main_~y~4 <= 81 && main_~x~4 <= 81) && 81 <= main_~y~4) && 81 <= main_~x~4)) || (((57 <= main_~y~4 && main_~y~4 <= 57) && main_~x~4 <= 57) && 57 <= main_~x~4)) || (((main_~x~4 <= 82 && 82 <= main_~y~4) && main_~y~4 <= 82) && 82 <= main_~x~4)) || (((main_~y~4 <= 58 && main_~x~4 <= 58) && 58 <= main_~y~4) && 58 <= main_~x~4)) || (78 <= main_~x~4 && (main_~x~4 <= 78 && 78 <= main_~y~4) && main_~y~4 <= 78)) || (((main_~y~4 <= 65 && main_~x~4 <= 65) && 65 <= main_~y~4) && 65 <= main_~x~4)) || (((main_~x~4 <= 90 && 90 <= main_~y~4) && main_~y~4 <= 90) && 90 <= main_~x~4)) || (63 <= main_~x~4 && (63 <= main_~y~4 && main_~y~4 <= 63) && main_~x~4 <= 63)) || (51 <= main_~x~4 && (main_~y~4 <= 51 && 51 <= main_~y~4) && main_~x~4 <= 51)) || (52 <= main_~x~4 && (main_~x~4 <= 52 && 52 <= main_~y~4) && main_~y~4 <= 52)) || (((74 <= main_~y~4 && main_~x~4 <= 74) && main_~y~4 <= 74) && 74 <= main_~x~4)) || (86 <= main_~x~4 && (86 <= main_~y~4 && main_~y~4 <= 86) && main_~x~4 <= 86)) || (56 <= main_~x~4 && (main_~y~4 <= 56 && main_~x~4 <= 56) && 56 <= main_~y~4)) || (67 <= main_~x~4 && (main_~y~4 <= 67 && 67 <= main_~y~4) && main_~x~4 <= 67)) || (83 <= main_~x~4 && (main_~y~4 <= 83 && 83 <= main_~y~4) && main_~x~4 <= 83)) || (((main_~x~4 <= 87 && 87 <= main_~y~4) && main_~y~4 <= 87) && 87 <= main_~x~4)) || (66 <= main_~x~4 && (66 <= main_~y~4 && main_~y~4 <= 66) && main_~x~4 <= 66)) || (((80 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 80) && 80 <= main_~x~4)) || (70 <= main_~x~4 && (70 <= main_~y~4 && main_~x~4 <= 70) && main_~y~4 <= 70)) || (71 <= main_~x~4 && (71 <= main_~y~4 && main_~x~4 <= 71) && main_~y~4 <= 71)) || (((main_~x~4 <= 75 && main_~y~4 <= 75) && 75 <= main_~y~4) && 75 <= main_~x~4)) || ((main_~y~4 <= 100 && 99 < main_~y~4) && 100 <= main_~x~4)) || ((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~y~4)) || (((main_~x~4 <= 92 && 92 <= main_~y~4) && main_~y~4 <= 92) && 92 <= main_~x~4) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main_~y~4 <= 96 && 96 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4) || (79 <= main_~x~4 && (main_~y~4 <= 79 && 79 <= main_~y~4) && main_~x~4 <= 79)) || (((main_~y~4 <= 97 && main_~x~4 <= 97) && 97 <= main_~y~4) && 97 <= main_~x~4)) || (((95 <= main_~y~4 && main_~y~4 <= 95) && main_~x~4 <= 95) && 95 <= main_~x~4)) || (((91 <= main_~y~4 && main_~x~4 <= 91) && main_~y~4 <= 91) && 91 <= main_~x~4)) || (((main_~x~4 <= 72 && 72 <= main_~y~4) && main_~y~4 <= 72) && 72 <= main_~x~4)) || (((main_~x~4 <= 62 && 62 <= main_~y~4) && main_~y~4 <= 62) && 62 <= main_~x~4)) || (54 <= main_~x~4 && (54 <= main_~y~4 && main_~x~4 <= 54) && main_~y~4 <= 54)) || (60 <= main_~x~4 && (main_~y~4 <= 60 && main_~x~4 <= 60) && 60 <= main_~y~4)) || (98 <= main_~x~4 && (main_~x~4 <= 98 && main_~y~4 <= 98) && 98 <= main_~y~4)) || (((88 <= main_~y~4 && main_~y~4 <= 88) && main_~x~4 <= 88) && 88 <= main_~x~4)) || (((main_~x~4 <= 73 && 73 <= main_~y~4) && main_~y~4 <= 73) && 73 <= main_~x~4)) || (64 <= main_~x~4 && (main_~x~4 <= 64 && 64 <= main_~y~4) && main_~y~4 <= 64)) || (((main_~x~4 <= 76 && 76 <= main_~y~4) && main_~y~4 <= 76) && 76 <= main_~x~4)) || (((main_~y~4 <= 84 && main_~x~4 <= 84) && 84 <= main_~y~4) && 84 <= main_~x~4)) || (((main_~y~4 <= 85 && 85 <= main_~y~4) && main_~x~4 <= 85) && 85 <= main_~x~4)) || (((main_~x~4 <= 61 && 61 <= main_~y~4) && main_~y~4 <= 61) && 61 <= main_~x~4)) || (((main_~x~4 <= 59 && main_~y~4 <= 59) && 59 <= main_~y~4) && 59 <= main_~x~4)) || (69 <= main_~x~4 && (main_~y~4 <= 69 && main_~x~4 <= 69) && 69 <= main_~y~4)) || (((55 <= main_~y~4 && main_~y~4 <= 55) && main_~x~4 <= 55) && 55 <= main_~x~4)) || (((99 <= main_~y~4 && main_~y~4 <= 99) && main_~x~4 <= 99) && 99 <= main_~x~4)) || (53 <= main_~x~4 && (main_~x~4 <= 53 && main_~y~4 <= 53) && 53 <= main_~y~4)) || (77 <= main_~x~4 && (main_~x~4 <= 77 && main_~y~4 <= 77) && 77 <= main_~y~4)) || (89 <= main_~x~4 && (main_~y~4 <= 89 && main_~x~4 <= 89) && 89 <= main_~y~4)) || (94 <= main_~x~4 && (main_~y~4 <= 94 && main_~x~4 <= 94) && 94 <= main_~y~4)) || (((main_~y~4 <= 93 && 93 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (68 <= main_~x~4 && (main_~x~4 <= 68 && main_~y~4 <= 68) && 68 <= main_~y~4)) || (((main_~y~4 <= 81 && main_~x~4 <= 81) && 81 <= main_~y~4) && 81 <= main_~x~4)) || (((57 <= main_~y~4 && main_~y~4 <= 57) && main_~x~4 <= 57) && 57 <= main_~x~4)) || (((main_~x~4 <= 82 && 82 <= main_~y~4) && main_~y~4 <= 82) && 82 <= main_~x~4)) || (((main_~y~4 <= 58 && main_~x~4 <= 58) && 58 <= main_~y~4) && 58 <= main_~x~4)) || (78 <= main_~x~4 && (main_~x~4 <= 78 && 78 <= main_~y~4) && main_~y~4 <= 78)) || (((main_~y~4 <= 65 && main_~x~4 <= 65) && 65 <= main_~y~4) && 65 <= main_~x~4)) || (((main_~x~4 <= 90 && 90 <= main_~y~4) && main_~y~4 <= 90) && 90 <= main_~x~4)) || (63 <= main_~x~4 && (63 <= main_~y~4 && main_~y~4 <= 63) && main_~x~4 <= 63)) || (51 <= main_~x~4 && (main_~y~4 <= 51 && 51 <= main_~y~4) && main_~x~4 <= 51)) || (52 <= main_~x~4 && (main_~x~4 <= 52 && 52 <= main_~y~4) && main_~y~4 <= 52)) || (((74 <= main_~y~4 && main_~x~4 <= 74) && main_~y~4 <= 74) && 74 <= main_~x~4)) || (86 <= main_~x~4 && (86 <= main_~y~4 && main_~y~4 <= 86) && main_~x~4 <= 86)) || (56 <= main_~x~4 && (main_~y~4 <= 56 && main_~x~4 <= 56) && 56 <= main_~y~4)) || (67 <= main_~x~4 && (main_~y~4 <= 67 && 67 <= main_~y~4) && main_~x~4 <= 67)) || (83 <= main_~x~4 && (main_~y~4 <= 83 && 83 <= main_~y~4) && main_~x~4 <= 83)) || (((main_~x~4 <= 87 && 87 <= main_~y~4) && main_~y~4 <= 87) && 87 <= main_~x~4)) || (66 <= main_~x~4 && (66 <= main_~y~4 && main_~y~4 <= 66) && main_~x~4 <= 66)) || (((80 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 80) && 80 <= main_~x~4)) || (70 <= main_~x~4 && (70 <= main_~y~4 && main_~x~4 <= 70) && main_~y~4 <= 70)) || (71 <= main_~x~4 && (71 <= main_~y~4 && main_~x~4 <= 71) && main_~y~4 <= 71)) || (((main_~x~4 <= 75 && main_~y~4 <= 75) && 75 <= main_~y~4) && 75 <= main_~x~4)) || ((main_~y~4 <= 100 && 99 < main_~y~4) && 100 <= main_~x~4)) || ((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~y~4)) || (((main_~x~4 <= 92 && 92 <= main_~y~4) && main_~y~4 <= 92) && 92 <= main_~x~4) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((main_~y~4 <= 96 && 96 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4) || (79 <= main_~x~4 && (main_~y~4 <= 79 && 79 <= main_~y~4) && main_~x~4 <= 79)) || (((main_~y~4 <= 97 && main_~x~4 <= 97) && 97 <= main_~y~4) && 97 <= main_~x~4)) || (((95 <= main_~y~4 && main_~y~4 <= 95) && main_~x~4 <= 95) && 95 <= main_~x~4)) || (((91 <= main_~y~4 && main_~x~4 <= 91) && main_~y~4 <= 91) && 91 <= main_~x~4)) || (((main_~x~4 <= 72 && 72 <= main_~y~4) && main_~y~4 <= 72) && 72 <= main_~x~4)) || (((main_~x~4 <= 62 && 62 <= main_~y~4) && main_~y~4 <= 62) && 62 <= main_~x~4)) || (54 <= main_~x~4 && (54 <= main_~y~4 && main_~x~4 <= 54) && main_~y~4 <= 54)) || (60 <= main_~x~4 && (main_~y~4 <= 60 && main_~x~4 <= 60) && 60 <= main_~y~4)) || (98 <= main_~x~4 && (main_~x~4 <= 98 && main_~y~4 <= 98) && 98 <= main_~y~4)) || (((88 <= main_~y~4 && main_~y~4 <= 88) && main_~x~4 <= 88) && 88 <= main_~x~4)) || (((main_~x~4 <= 73 && 73 <= main_~y~4) && main_~y~4 <= 73) && 73 <= main_~x~4)) || (64 <= main_~x~4 && (main_~x~4 <= 64 && 64 <= main_~y~4) && main_~y~4 <= 64)) || (((main_~x~4 <= 76 && 76 <= main_~y~4) && main_~y~4 <= 76) && 76 <= main_~x~4)) || (((main_~y~4 <= 84 && main_~x~4 <= 84) && 84 <= main_~y~4) && 84 <= main_~x~4)) || (((main_~y~4 <= 85 && 85 <= main_~y~4) && main_~x~4 <= 85) && 85 <= main_~x~4)) || (((main_~x~4 <= 61 && 61 <= main_~y~4) && main_~y~4 <= 61) && 61 <= main_~x~4)) || (((main_~x~4 <= 59 && main_~y~4 <= 59) && 59 <= main_~y~4) && 59 <= main_~x~4)) || (69 <= main_~x~4 && (main_~y~4 <= 69 && main_~x~4 <= 69) && 69 <= main_~y~4)) || (((55 <= main_~y~4 && main_~y~4 <= 55) && main_~x~4 <= 55) && 55 <= main_~x~4)) || (((99 <= main_~y~4 && main_~y~4 <= 99) && main_~x~4 <= 99) && 99 <= main_~x~4)) || (53 <= main_~x~4 && (main_~x~4 <= 53 && main_~y~4 <= 53) && 53 <= main_~y~4)) || (77 <= main_~x~4 && (main_~x~4 <= 77 && main_~y~4 <= 77) && 77 <= main_~y~4)) || (89 <= main_~x~4 && (main_~y~4 <= 89 && main_~x~4 <= 89) && 89 <= main_~y~4)) || (94 <= main_~x~4 && (main_~y~4 <= 94 && main_~x~4 <= 94) && 94 <= main_~y~4)) || (((main_~y~4 <= 93 && 93 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (68 <= main_~x~4 && (main_~x~4 <= 68 && main_~y~4 <= 68) && 68 <= main_~y~4)) || (((main_~y~4 <= 81 && main_~x~4 <= 81) && 81 <= main_~y~4) && 81 <= main_~x~4)) || (((57 <= main_~y~4 && main_~y~4 <= 57) && main_~x~4 <= 57) && 57 <= main_~x~4)) || (((main_~x~4 <= 82 && 82 <= main_~y~4) && main_~y~4 <= 82) && 82 <= main_~x~4)) || (((main_~y~4 <= 58 && main_~x~4 <= 58) && 58 <= main_~y~4) && 58 <= main_~x~4)) || (78 <= main_~x~4 && (main_~x~4 <= 78 && 78 <= main_~y~4) && main_~y~4 <= 78)) || (((main_~y~4 <= 65 && main_~x~4 <= 65) && 65 <= main_~y~4) && 65 <= main_~x~4)) || (((main_~x~4 <= 90 && 90 <= main_~y~4) && main_~y~4 <= 90) && 90 <= main_~x~4)) || (63 <= main_~x~4 && (63 <= main_~y~4 && main_~y~4 <= 63) && main_~x~4 <= 63)) || (51 <= main_~x~4 && (main_~y~4 <= 51 && 51 <= main_~y~4) && main_~x~4 <= 51)) || (52 <= main_~x~4 && (main_~x~4 <= 52 && 52 <= main_~y~4) && main_~y~4 <= 52)) || (((74 <= main_~y~4 && main_~x~4 <= 74) && main_~y~4 <= 74) && 74 <= main_~x~4)) || (86 <= main_~x~4 && (86 <= main_~y~4 && main_~y~4 <= 86) && main_~x~4 <= 86)) || (56 <= main_~x~4 && (main_~y~4 <= 56 && main_~x~4 <= 56) && 56 <= main_~y~4)) || (67 <= main_~x~4 && (main_~y~4 <= 67 && 67 <= main_~y~4) && main_~x~4 <= 67)) || (83 <= main_~x~4 && (main_~y~4 <= 83 && 83 <= main_~y~4) && main_~x~4 <= 83)) || (((main_~x~4 <= 87 && 87 <= main_~y~4) && main_~y~4 <= 87) && 87 <= main_~x~4)) || (66 <= main_~x~4 && (66 <= main_~y~4 && main_~y~4 <= 66) && main_~x~4 <= 66)) || (((80 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 80) && 80 <= main_~x~4)) || (70 <= main_~x~4 && (70 <= main_~y~4 && main_~x~4 <= 70) && main_~y~4 <= 70)) || (71 <= main_~x~4 && (71 <= main_~y~4 && main_~x~4 <= 71) && main_~y~4 <= 71)) || (((main_~x~4 <= 75 && main_~y~4 <= 75) && 75 <= main_~y~4) && 75 <= main_~x~4)) || ((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~y~4)) || (((main_~x~4 <= 92 && 92 <= main_~y~4) && main_~y~4 <= 92) && 92 <= main_~x~4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. SAFE Result, 85.0s OverallTime, 57 OverallIterations, 102 TraceHistogramMax, 16.6s AutomataDifference, 0.0s DeadEndRemovalTime, 8.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 464 SDtfs, 947 SDslu, 10266 SDs, 0 SdLazy, 8094 SolverSat, 1708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8028 GetRequests, 6199 SyntacticMatches, 2 SemanticMatches, 1827 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6900 ImplicationChecksByTransitivity, 48.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 57 MinimizatonAttempts, 3995 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 2114 HoareAnnotationTreeSize, 4 FomulaSimplifications, 40190 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 596 FormulaSimplificationTreeSizeReductionInter, 6.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 51.7s InterpolantComputationTime, 13339 NumberOfCodeBlocks, 12541 NumberOfCodeBlocksAsserted, 964 NumberOfCheckSat, 13227 ConstructedInterpolants, 0 QuantifiedInterpolants, 5674359 SizeOfPredicates, 25 NumberOfNonLiveVariables, 11131 ConjunctsInSsa, 1456 ConjunctsInUnsatCore, 112 InterpolantComputations, 3 PerfectInterpolantSequences, 183380/343178 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007.c.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-27-49-886.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007.c.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-27-49-886.csv Received shutdown request...